The cardiac cycle
Download as ppt, pdf2 likes851 views
The cardiac cycle describes the sequence of events in one heartbeat. It involves systole, the contraction of the ventricles, and diastole, the relaxation of the ventricles. During atrial systole, the atria contract and blood passes to the relaxed ventricles. During ventricular systole, the ventricles contract and force blood out through the arteries. During diastole, the ventricles relax and blood flows back into the atria from the veins, completing the cycle.
1 of 14
Downloaded 68 times
Ad
Recommended
Cardiac cycle made easy
Cardiac cycle made easy Md Rahman
油
The cardiac cycle describes the sequence of events that occur with each heartbeat. It involves mechanical, electrical, and pressure changes in the heart. The cycle begins with ventricular relaxation and atrial filling in diastole. Upon electrical stimulation, the ventricles contract in systole to pump blood out of the heart. This is accompanied by characteristic pressure and volume changes in the chambers as well as events on an electrocardiogram like the P, QRS, and T waves. The cycle repeats with each heartbeat to sustain blood circulation.Anatomy And Physiology of Human Heart
Anatomy And Physiology of Human Heart C L GUPTA EYE INSTITUTE MORADABAD UTTER PRADESH
油
The document provides a comprehensive overview of the anatomy of the heart, detailing its structure, function, and the arrangement of its components, including the chambers, walls, and valves. It describes the heart's protective pericardium, the dual blood supply from the coronary arteries, and the nerve supply that regulates its activity. Key features such as atria, ventricles, and valves are explained in terms of their roles in blood flow and circulation.CARDIAC CYCLE
CARDIAC CYCLEDr Nilesh Kate
油
This document summarizes the cardiac cycle and its phases. It begins with an introduction to the heart as a dual pump and defines the cardiac cycle. It then describes the normal duration of the cardiac cycle and its various phases, including atrial systole, atrial diastole, ventricular systole, and ventricular diastole. It discusses the pressure and volume changes that occur in the atria, ventricles, aorta and pulmonary artery during each phase of the cardiac cycle. It also summarizes the heart sounds and murmurs that can occur.Cardiac cycle ii
Cardiac cycle iiDrChintansinh Parmar
油
The document summarizes the cardiac cycle and related events. It describes:
1) Atrial pressure changes including a, c, and v waves that occur during atrial systole and ventricular contraction and filling.
2) The relationship between the ECG and cardiac cycle, with the P wave occurring during atrial depolarization, the QRS complex starting ventricular contraction, and the T wave coinciding with ventricular relaxation.
3) The timing of events in the right and left sides of the heart, with right atrial contraction preceding left atrial contraction and right ventricular ejection beginning before left ventricular ejection.
4) Key metrics like end diastolic volume, stroke volume, end systolic volumeThymus gland and spleen by Mohammad Mufarreh
Thymus gland and spleen by Mohammad MufarrehMMufarreh
油
The document discusses the anatomy and function of the thymus as a primary lymphoid organ essential for T lymphocyte development and maturation, highlighting its structure, including lobules, cortex, and medulla. It elaborates on the processes of thymocyte selection, T cell education, and the implications of thymus abnormalities such as in DiGeorge syndrome. Additionally, it briefly addresses the spleen's role in immune responses to bloodstream antigens and its structural components, including red and white pulp.Micturition Reflex.ppt
Micturition Reflex.pptssuser7ec6af
油
The urinary reflex involves the coordinated actions of the bladder, urethra, and sphincter muscles to regulate urination. When the bladder fills to 300-400mL, stretch receptors send signals to the spinal cord and brain. This triggers efferent signals through the pelvic nerve that cause the detrusor muscle to contract and the internal sphincter to relax, allowing urine to enter the urethra. Further stretching of the urethra sends feedback signals, and the external sphincter then relaxes to allow urination. Higher brain centers also facilitate or inhibit micturition through connections to the spinal micturition centers.Development of respiratory system
Development of respiratory systemRohit Paswan
油
The respiratory system develops from a respiratory diverticulum that appears as an outgrowth of the ventral wall of the primitive foregut at 4 weeks of intrauterine life. The larynx develops from the cranial part of the laryngotracheal diverticulum, which remains connected to the pharynx and forms the laryngeal inlet. The trachea develops from the distal part of the diverticulum between the larynx and bronchial buds. Each bronchial bud gives rise to the principal bronchus of the right and left lungs, which then subdivide to form the bronchial tree through multiple generations of branching.Cardiac output & factors affecting it.
Cardiac output & factors affecting it.ANDROIDTIPS2
油
The document discusses cardiac output, defined as the volume of blood pumped by each ventricle per minute, which is influenced by heart rate and stroke volume. It outlines the components and factors affecting cardiac output, including venous return and the force of contraction, and provides a formula for calculation. It also touches on measurement methods and the consequences of low and high cardiac output, such as heart failure or infections.Cardiology
CardiologyMiami Dade
油
Unstable angina is caused by plaque rupture, ulceration, or hemorrhage in the coronary arteries, which can lead to thrombus formation. It is diagnosed using EKGs showing ST segment changes and treated with medications to reduce blood pressure, heart rate, and oxygen demand on the heart. Prinzmetal's angina involves ST segment elevation and often affects young women, usually occurring in the morning and involving the right coronary artery. It is treated with nitrates and calcium channel blockers to reduce oxygen consumption and induce vasodilatation. Cardiac failure presents with symptoms like shortness of breath, fatigue, and edema. Causes include heart attacks, infections, or valve problems. Treatment focuses on correcting reversible causesmanagement of Fluid & electrolytes disturbances.pptx
management of Fluid & electrolytes disturbances.pptxhmgamh8
油
This document discusses fluid and electrolyte disturbances. It begins by providing the normal ranges for specific gravity and pH of urine, extracellular fluid volume, definition of the third space, and normal urine output in adults. It then lists intended learning outcomes related to fluid homeostasis, maintenance, deficits, and electrolyte disturbances. The majority of the document covers the physiology of fluid compartments, daily maintenance, correcting deficits, and managing hypernatremia, hyponatremia, hyperkalemia, and hypokalemia. Formulas and case examples are provided for calculating and correcting electrolyte imbalances.Development of the heart
Development of the heartQuan Fu Gan
油
The document summarizes the development of the heart from its initial formation as a heart tube through the development of its chambers, valves, and conducting system. Key stages include the fusion of the bilateral heart tubes, formation of the atria, bulbus cordis and ventricles, separation of the aorta and pulmonary trunk, development of the valves and septa that divide the chambers, and incorporation of veins and changes to the exterior shape. Potential congenital anomalies are also briefly outlined.Cardiac cycle
Cardiac cycleNikhil Vaishnav
油
The cardiac cycle describes the sequence of events in the heart from the beginning of one heartbeat to the next. It consists of both electrical and mechanical events in the atria and ventricles over a total duration of 0.8 seconds for each cycle. The cycle includes atrial systole, atrial diastole, ventricular systole (consisting of isovolumic contraction and ejection phases), and ventricular diastole (consisting of relaxation, rapid filling, reduced filling, and last rapid filling phases). Precise timing and coordination of the opening and closing of the atrioventricular and semilunar valves are crucial for efficient pumping of blood throughout the cardiac cycle.Mechanism of-respiration
Mechanism of-respirationMohamed M. Elsaied
油
This document discusses the mechanism of respiration. It describes the anatomy of the respiratory system and the mechanics of breathing, including inspiration and expiration. It explains external and internal respiration processes and the role of muscles like the diaphragm in breathing. Pressure changes in the lungs during ventilation are analyzed. Muscle involvement in inspiration and expiration is outlined.Kidney function
Kidney functionAbino David
油
The kidney has four main functions:
1. Excretory - forms and excretes urine through glomerular filtration, reabsorption, and secretion
2. Homeostatic - regulates blood volume, pressure, pH and electrolyte concentrations
3. Endocrine - produces hormones like erythropoietin, renin, and prostaglandins
4. Metabolic - performs gluconeogenesis during starvation and metabolizes hormonesGross anatomy of heart
Gross anatomy of heart Nikhil Vaishnav
油
The document provides an overview of heart anatomy. It describes the heart's location in the thorax and its dimensions. The four chambers - right and left atria and ventricles - are introduced. Each chamber's function is summarized as receiving or pumping blood. The three layers of the heart - epicardium, myocardium, and endocardium - are defined. The cardiac skeleton is described as a fibrous structure that partitions the chambers and anchors the heart valves.Cardiac muscle physiology
Cardiac muscle physiologyKanimozhi Sadasivam
油
This document provides an overview of cardiac muscle structure and function. It defines key terms related to the properties of cardiac muscle such as rhythmicity, excitability, conductivity, and contractility. It describes the cardiac syncytium and normal conduction pathway in the heart. It explains excitation-contraction coupling in cardiac muscle and compares it to skeletal muscle. It also compares action potentials in the sinoatrial node and ventricular muscle. Finally, it discusses the significance of the plateau and refractory period in ventricular muscle action potentials.Cardiac cycle
Cardiac cyclemariaidrees3
油
The cardiac cycle describes the sequence of events that occur with each heartbeat. It consists of systole, when the heart contracts and pumps blood, and diastole, when the heart relaxes and fills with blood. The cardiac cycle includes atrial and ventricular events. Atrial systole forces a small amount of blood into the ventricles, while atrial diastole allows the atria to fill with blood. Ventricular events include isovolumetric contraction, ejection of blood, isovolumetric relaxation, and rapid and slow filling as the ventricles refill with blood. The pressures and volumes in the heart chambers change throughout the cardiac cycle.CARDIAC CYCLE.pptx
CARDIAC CYCLE.pptxCharlesSsekawu
油
The document describes the cardiac cycle and its key events. The cardiac cycle consists of systole, when the heart contracts and pumps blood, and diastole, when the heart relaxes and fills with blood. Each cycle takes approximately 0.8 seconds. Systole includes the isometric contraction, when pressure rises but volume does not change, and the ejection period, when blood is pumped out. Diastole includes isometric relaxation as pressure falls, followed by three filling phases - rapid, slow, and last rapid filling due to atrial contraction. The document provides details on the timing and mechanics of each phase of the cardiac cycle.Hemodynamics 202
Hemodynamics 202aaronpaulbaliga
油
The document discusses key concepts in cardiovascular physiology including:
1. Hemodynamic parameters such as blood flow, pressure, pressure gradient, vessel diameter, blood velocity, and peripheral resistance and how they are interrelated.
2. Physical laws governing blood flow including Bernoulli's principle, Poiseuille's law, and Ohm's law and how they describe the relationship between flow, pressure, resistance, and vessel geometry.
3. Factors that determine blood flow and resistance including viscosity, vessel length, radius and the "fourth power law".Cardiac cycle
Cardiac cycleDrChintansinh Parmar
油
The cardiac cycle begins with the spontaneous generation of an action potential in the sinus node which triggers contractions that move through the heart. It consists of systole, where the heart contracts to pump blood, and diastole, where the heart relaxes and refills with blood. Each cycle takes approximately 0.8 seconds and involves coordinated opening and closing of valves between the atria and ventricles and between the ventricles and arteries. Pressure and volume curves change dynamically throughout the cycle as the heart contracts and relaxes, pumping blood through the body.Structure and function of arteries and veins.
Structure and function of arteries and veins.EXCELRA
油
The document compares and contrasts the key features of arteries, veins, and capillaries. Arteries carry oxygenated blood away from the heart at high pressure, have thick muscular walls, and a relatively narrow lumen. Veins carry deoxygenated blood back to the heart at low pressure, have thinner walls that can collapse, and larger lumens. Capillaries have the thinnest walls of only one cell layer and the smallest lumens, connecting arteries and veins to supply tissues with nutrients and oxygen and remove waste.The Cardiac Cycle
The Cardiac CycleChristabelle C辿cile
油
The cardiac cycle refers to the series of events in the heart from the start of one heartbeat to the next, initiated by the sino-atrial node (SAN) that generates contraction signals. It consists of four main stages: atrial diastole, atrial systole, ventricular systole, and ventricular diastole, each involving the relaxation and contraction of heart chambers to effectively circulate blood. The atrioventricular node (AVN) and Purkinje fibers play essential roles in conducting the excitation waves that coordinate these contractions.Mediastinum
MediastinumDr Laxman Khanal
油
This document outlines the anatomy of the mediastinum, describing its divisions, boundaries, contents, and related pathologies. It explains the significance of structures within the superior, middle, and posterior mediastinum, as well as clinical implications such as mediastinal shift and mediastinal syndrome. Key content includes details about the heart, major vessels, and nerves, and conditions like mediastinitis and mediastinal widening.Development of heart ii
Development of heart iiRohit Paswan
油
The document summarizes the development of the atria and ventricles of the heart. It describes how the atrioventricular canal divides into right and left halves through the formation of endocardial cushions. It also discusses the formation of the interatrial and interventricular septa that divide the heart chambers. The document outlines the development of the conduction system including the sinoatrial node, atrioventricular node and bundle of His. It briefly mentions some congenital heart malformations such as atrial and ventricular septal defects.Cvs anatomy
Cvs anatomyManohar Vishnoi
油
The document provides information about the cardiovascular system, including the heart and blood vessels. It discusses the anatomy and layers of the heart, including the pericardium, myocardium, and endocardium. It describes the four chambers of the heart - two atria and two ventricles. It outlines the heart's location in the thorax and examines the heart valves and conducting system, including the sinoatrial and atrioventricular nodes. It also reviews the coronary arteries that supply blood to the heart.Cardiac cycle new
Cardiac cycle newJohny Wilbert
油
The document discusses the cardiac cycle and its various phases. It describes that the cardiac cycle consists of systole and diastole. Systole is the contraction phase where the ventricles pump blood out, while diastole is the relaxation phase where the ventricles fill with blood. The cycle is further divided into atrial and ventricular events. Each phase of the cardiac cycle is defined along with its duration and significance in the overall heart function.Cardiac cycle
Cardiac cycleDr. Manish Kharel
油
The cardiac cycle describes the repeating sequence of heart contraction and relaxation that pumps blood throughout the body. It has two main phases: diastole, where the heart relaxes and fills with blood, and systole, where the heart contracts to pump out blood. Specifically, it involves atrial diastole, atrial systole, ventricular diastole, and ventricular systole. The cardiac cycle ensures blood is continuously circulating at a rate of around 72 beats per minute, pumping approximately 5-6 liters of blood per minute known as cardiac output through the coordinated squeezing of the heart's left and right ventricles.Compliance of lung
Compliance of lungDr Nilesh Kate
油
The document discusses lung elastance, compliance, and work of breathing. It defines key terms like elastance, compliance, and surface tension. It describes the elastance of the thoracic cage and lungs, the role of pulmonary surfactant in reducing surface tension, and how compliance is measured. It also explains the different components of work of breathing, including overcoming elastic, viscous, and airway resistance, and how work of breathing is affected in restrictive and obstructive lung diseases.Trabajo antropolog達 aAngieSandoval12
油
El documento describe cuatro lazos tri叩dicos fundamentales en la naturaleza humana: 1) el lazo entre el cerebro, la mente y la cultura, 2) el lazo entre la raz坦n, el afecto y el impulso, 3) el lazo entre los individuos, la sociedad y la especie humana, y 4) la unidualidad fundamental del ser humano como un ser a la vez biol坦gico y cultural.H動畛ng d畉n s畛 d畛ng tin h畛c vn ph嘆ng r畉t chi ti畉t
H動畛ng d畉n s畛 d畛ng tin h畛c vn ph嘆ng r畉t chi ti畉tKe Toan Ha Noi
油
Ti li畛u tr狸nh by c叩c thao t叩c c董 b畉n tr棚n h畛 i畛u hnh Windows, bao g畛m vi畛c s畛 d畛ng chu畛t v bn ph鱈m. N坦 m担 t畉 c叩c ch畛c nng c畛a c叩c ph鱈m kh叩c nhau v c叩ch s畛 d畛ng ph鱈m t畉t trong Microsoft Excel. Cu畛i c湛ng, ti li畛u gi畉i th鱈ch c叩ch t畛 ch畛c d畛 li畛u trong c叩c th動 m畛c v t畛p tin tr棚n m叩y t鱈nh.More Related Content
What's hot (20)
Cardiology
CardiologyMiami Dade
油
Unstable angina is caused by plaque rupture, ulceration, or hemorrhage in the coronary arteries, which can lead to thrombus formation. It is diagnosed using EKGs showing ST segment changes and treated with medications to reduce blood pressure, heart rate, and oxygen demand on the heart. Prinzmetal's angina involves ST segment elevation and often affects young women, usually occurring in the morning and involving the right coronary artery. It is treated with nitrates and calcium channel blockers to reduce oxygen consumption and induce vasodilatation. Cardiac failure presents with symptoms like shortness of breath, fatigue, and edema. Causes include heart attacks, infections, or valve problems. Treatment focuses on correcting reversible causesmanagement of Fluid & electrolytes disturbances.pptx
management of Fluid & electrolytes disturbances.pptxhmgamh8
油
This document discusses fluid and electrolyte disturbances. It begins by providing the normal ranges for specific gravity and pH of urine, extracellular fluid volume, definition of the third space, and normal urine output in adults. It then lists intended learning outcomes related to fluid homeostasis, maintenance, deficits, and electrolyte disturbances. The majority of the document covers the physiology of fluid compartments, daily maintenance, correcting deficits, and managing hypernatremia, hyponatremia, hyperkalemia, and hypokalemia. Formulas and case examples are provided for calculating and correcting electrolyte imbalances.Development of the heart
Development of the heartQuan Fu Gan
油
The document summarizes the development of the heart from its initial formation as a heart tube through the development of its chambers, valves, and conducting system. Key stages include the fusion of the bilateral heart tubes, formation of the atria, bulbus cordis and ventricles, separation of the aorta and pulmonary trunk, development of the valves and septa that divide the chambers, and incorporation of veins and changes to the exterior shape. Potential congenital anomalies are also briefly outlined.Cardiac cycle
Cardiac cycleNikhil Vaishnav
油
The cardiac cycle describes the sequence of events in the heart from the beginning of one heartbeat to the next. It consists of both electrical and mechanical events in the atria and ventricles over a total duration of 0.8 seconds for each cycle. The cycle includes atrial systole, atrial diastole, ventricular systole (consisting of isovolumic contraction and ejection phases), and ventricular diastole (consisting of relaxation, rapid filling, reduced filling, and last rapid filling phases). Precise timing and coordination of the opening and closing of the atrioventricular and semilunar valves are crucial for efficient pumping of blood throughout the cardiac cycle.Mechanism of-respiration
Mechanism of-respirationMohamed M. Elsaied
油
This document discusses the mechanism of respiration. It describes the anatomy of the respiratory system and the mechanics of breathing, including inspiration and expiration. It explains external and internal respiration processes and the role of muscles like the diaphragm in breathing. Pressure changes in the lungs during ventilation are analyzed. Muscle involvement in inspiration and expiration is outlined.Kidney function
Kidney functionAbino David
油
The kidney has four main functions:
1. Excretory - forms and excretes urine through glomerular filtration, reabsorption, and secretion
2. Homeostatic - regulates blood volume, pressure, pH and electrolyte concentrations
3. Endocrine - produces hormones like erythropoietin, renin, and prostaglandins
4. Metabolic - performs gluconeogenesis during starvation and metabolizes hormonesGross anatomy of heart
Gross anatomy of heart Nikhil Vaishnav
油
The document provides an overview of heart anatomy. It describes the heart's location in the thorax and its dimensions. The four chambers - right and left atria and ventricles - are introduced. Each chamber's function is summarized as receiving or pumping blood. The three layers of the heart - epicardium, myocardium, and endocardium - are defined. The cardiac skeleton is described as a fibrous structure that partitions the chambers and anchors the heart valves.Cardiac muscle physiology
Cardiac muscle physiologyKanimozhi Sadasivam
油
This document provides an overview of cardiac muscle structure and function. It defines key terms related to the properties of cardiac muscle such as rhythmicity, excitability, conductivity, and contractility. It describes the cardiac syncytium and normal conduction pathway in the heart. It explains excitation-contraction coupling in cardiac muscle and compares it to skeletal muscle. It also compares action potentials in the sinoatrial node and ventricular muscle. Finally, it discusses the significance of the plateau and refractory period in ventricular muscle action potentials.Cardiac cycle
Cardiac cyclemariaidrees3
油
The cardiac cycle describes the sequence of events that occur with each heartbeat. It consists of systole, when the heart contracts and pumps blood, and diastole, when the heart relaxes and fills with blood. The cardiac cycle includes atrial and ventricular events. Atrial systole forces a small amount of blood into the ventricles, while atrial diastole allows the atria to fill with blood. Ventricular events include isovolumetric contraction, ejection of blood, isovolumetric relaxation, and rapid and slow filling as the ventricles refill with blood. The pressures and volumes in the heart chambers change throughout the cardiac cycle.CARDIAC CYCLE.pptx
CARDIAC CYCLE.pptxCharlesSsekawu
油
The document describes the cardiac cycle and its key events. The cardiac cycle consists of systole, when the heart contracts and pumps blood, and diastole, when the heart relaxes and fills with blood. Each cycle takes approximately 0.8 seconds. Systole includes the isometric contraction, when pressure rises but volume does not change, and the ejection period, when blood is pumped out. Diastole includes isometric relaxation as pressure falls, followed by three filling phases - rapid, slow, and last rapid filling due to atrial contraction. The document provides details on the timing and mechanics of each phase of the cardiac cycle.Hemodynamics 202
Hemodynamics 202aaronpaulbaliga
油
The document discusses key concepts in cardiovascular physiology including:
1. Hemodynamic parameters such as blood flow, pressure, pressure gradient, vessel diameter, blood velocity, and peripheral resistance and how they are interrelated.
2. Physical laws governing blood flow including Bernoulli's principle, Poiseuille's law, and Ohm's law and how they describe the relationship between flow, pressure, resistance, and vessel geometry.
3. Factors that determine blood flow and resistance including viscosity, vessel length, radius and the "fourth power law".Cardiac cycle
Cardiac cycleDrChintansinh Parmar
油
The cardiac cycle begins with the spontaneous generation of an action potential in the sinus node which triggers contractions that move through the heart. It consists of systole, where the heart contracts to pump blood, and diastole, where the heart relaxes and refills with blood. Each cycle takes approximately 0.8 seconds and involves coordinated opening and closing of valves between the atria and ventricles and between the ventricles and arteries. Pressure and volume curves change dynamically throughout the cycle as the heart contracts and relaxes, pumping blood through the body.Structure and function of arteries and veins.
Structure and function of arteries and veins.EXCELRA
油
The document compares and contrasts the key features of arteries, veins, and capillaries. Arteries carry oxygenated blood away from the heart at high pressure, have thick muscular walls, and a relatively narrow lumen. Veins carry deoxygenated blood back to the heart at low pressure, have thinner walls that can collapse, and larger lumens. Capillaries have the thinnest walls of only one cell layer and the smallest lumens, connecting arteries and veins to supply tissues with nutrients and oxygen and remove waste.The Cardiac Cycle
The Cardiac CycleChristabelle C辿cile
油
The cardiac cycle refers to the series of events in the heart from the start of one heartbeat to the next, initiated by the sino-atrial node (SAN) that generates contraction signals. It consists of four main stages: atrial diastole, atrial systole, ventricular systole, and ventricular diastole, each involving the relaxation and contraction of heart chambers to effectively circulate blood. The atrioventricular node (AVN) and Purkinje fibers play essential roles in conducting the excitation waves that coordinate these contractions.Mediastinum
MediastinumDr Laxman Khanal
油
This document outlines the anatomy of the mediastinum, describing its divisions, boundaries, contents, and related pathologies. It explains the significance of structures within the superior, middle, and posterior mediastinum, as well as clinical implications such as mediastinal shift and mediastinal syndrome. Key content includes details about the heart, major vessels, and nerves, and conditions like mediastinitis and mediastinal widening.Development of heart ii
Development of heart iiRohit Paswan
油
The document summarizes the development of the atria and ventricles of the heart. It describes how the atrioventricular canal divides into right and left halves through the formation of endocardial cushions. It also discusses the formation of the interatrial and interventricular septa that divide the heart chambers. The document outlines the development of the conduction system including the sinoatrial node, atrioventricular node and bundle of His. It briefly mentions some congenital heart malformations such as atrial and ventricular septal defects.Cvs anatomy
Cvs anatomyManohar Vishnoi
油
The document provides information about the cardiovascular system, including the heart and blood vessels. It discusses the anatomy and layers of the heart, including the pericardium, myocardium, and endocardium. It describes the four chambers of the heart - two atria and two ventricles. It outlines the heart's location in the thorax and examines the heart valves and conducting system, including the sinoatrial and atrioventricular nodes. It also reviews the coronary arteries that supply blood to the heart.Cardiac cycle new
Cardiac cycle newJohny Wilbert
油
The document discusses the cardiac cycle and its various phases. It describes that the cardiac cycle consists of systole and diastole. Systole is the contraction phase where the ventricles pump blood out, while diastole is the relaxation phase where the ventricles fill with blood. The cycle is further divided into atrial and ventricular events. Each phase of the cardiac cycle is defined along with its duration and significance in the overall heart function.Cardiac cycle
Cardiac cycleDr. Manish Kharel
油
The cardiac cycle describes the repeating sequence of heart contraction and relaxation that pumps blood throughout the body. It has two main phases: diastole, where the heart relaxes and fills with blood, and systole, where the heart contracts to pump out blood. Specifically, it involves atrial diastole, atrial systole, ventricular diastole, and ventricular systole. The cardiac cycle ensures blood is continuously circulating at a rate of around 72 beats per minute, pumping approximately 5-6 liters of blood per minute known as cardiac output through the coordinated squeezing of the heart's left and right ventricles.Compliance of lung
Compliance of lungDr Nilesh Kate
油
The document discusses lung elastance, compliance, and work of breathing. It defines key terms like elastance, compliance, and surface tension. It describes the elastance of the thoracic cage and lungs, the role of pulmonary surfactant in reducing surface tension, and how compliance is measured. It also explains the different components of work of breathing, including overcoming elastic, viscous, and airway resistance, and how work of breathing is affected in restrictive and obstructive lung diseases.Viewers also liked (20)
Trabajo antropolog達 aAngieSandoval12
油
El documento describe cuatro lazos tri叩dicos fundamentales en la naturaleza humana: 1) el lazo entre el cerebro, la mente y la cultura, 2) el lazo entre la raz坦n, el afecto y el impulso, 3) el lazo entre los individuos, la sociedad y la especie humana, y 4) la unidualidad fundamental del ser humano como un ser a la vez biol坦gico y cultural.H動畛ng d畉n s畛 d畛ng tin h畛c vn ph嘆ng r畉t chi ti畉t
H動畛ng d畉n s畛 d畛ng tin h畛c vn ph嘆ng r畉t chi ti畉tKe Toan Ha Noi
油
Ti li畛u tr狸nh by c叩c thao t叩c c董 b畉n tr棚n h畛 i畛u hnh Windows, bao g畛m vi畛c s畛 d畛ng chu畛t v bn ph鱈m. N坦 m担 t畉 c叩c ch畛c nng c畛a c叩c ph鱈m kh叩c nhau v c叩ch s畛 d畛ng ph鱈m t畉t trong Microsoft Excel. Cu畛i c湛ng, ti li畛u gi畉i th鱈ch c叩ch t畛 ch畛c d畛 li畛u trong c叩c th動 m畛c v t畛p tin tr棚n m叩y t鱈nh.Cientifico 1Yesenia Castillo Salinas
油
Este documento describe los conceptos fundamentales de la visi坦n binocular, incluyendo la fusi坦n de im叩genes retinianas, el hor坦ptero emp鱈rico, el 叩rea de Panum y la diplop鱈a fisiol坦gica. Tambi辿n explica posibles alteraciones de la visi坦n binocular como el s鱈ndrome de monofijaci坦n, la correspondencia retiniana an坦mala y las adaptaciones sensoriales que ocurren cuando se rompe la binocularidad durante el desarrollo visual. Finalmente, analiza las pruebas diagn坦sticas necesarias para comprender la etiologDesperately seeking purpose sample
Desperately seeking purpose sampleMaxine Jones
油
This document discusses finding one's sense of purpose and greater meaning in life. It suggests that many people feel they are meant to do something bigger but get caught up in daily demands. The introduction describes a conversation where participants openly discussed their frustrations with not knowing their deeper purpose. The chapter then explores signs that one may be ready to seek purpose, and signs that a sense of greater purpose is breaking through into one's awareness. It asserts that we all have an encoded sense of purpose within us, and moments when it breaks through can profoundly impact our view of ourselves and life.Folleto Corporativo ILG Logistics S.A.
Folleto Corporativo ILG Logistics S.A.Ricardo Arias
油
ILG Logistics S.A. is an strategic partner for all companies requiring world class logistics support in Central America.#CPAF15 WS7: Addressing climate change issues in fisheries and aquaculture in...
#CPAF15 WS7: Addressing climate change issues in fisheries and aquaculture in...Technical Centre for Agricultural and Rural Cooperation ACP-EU (CTA)
油
The document discusses climate change impacts on fisheries and aquaculture in the Caribbean region and recent initiatives to address these issues. It outlines key challenges like rising sea levels, changing weather patterns, and damage to coral reefs from warming oceans. Recent regional projects aim to build climate resilience in fishing communities through activities like developing early warning systems for fishers of weather threats and establishing a regional fisheries risk insurance fund to incentivize climate-smart practices. The document also discusses partnerships and opportunities to scale up best practices to increase adaptation efforts across the Caribbean.The CMO Imperative - Data Driven Results
The CMO Imperative - Data Driven ResultsScribe Software Corp.
油
Scribe Software presented on achieving integrated marketing automation through a data-driven approach. They discussed the changing landscape where data and marketing automation are increasingly important. Scribe outlined strategies for data-driven marketing like defining use cases and logical data mappings. An example was provided of capturing large customer orders from an ERP system and adding them as subscribers in a marketing automation platform. Scribe believes starting with low hanging fruit and building experience is key to success. Questions were taken at the end.Capilla 12 09-08Colegio Cristiano Logos
油
El documento invita repetidamente a las personas a venir ante Dios y adorarle. Resalta que al escoger el amor de Dios, se doblar叩n las rodillas y se tendr叩 un tesoro eterno. Celebra a Jes炭s como la 炭nica raz坦n de adoraci坦n y esperanza, y agradece que vino a salvar y ayudar. Finalmente, alaba el nombre de Dios por dejar su trono para mostrar la luz, pagar la deuda humana muriendo en la cruz y levantarse de entre los muertos.TechComm Responsive Publishing Suite | TechComm Mobile App 2.0
TechComm Responsive Publishing Suite | TechComm Mobile App 2.0SQUIDDS / Akademie / Konsortium
油
The document discusses the capabilities and benefits of the Techcomm Responsive Publishing Suite, highlighting its mobile app that allows for easy management and delivery of technical communications. It outlines a four-step workflow for creating, managing, and distributing content using HTML5 responsive technology. Additionally, it includes information on security measures and various business models for utilizing the service.Barber Osgerby Project Stories for the Design Museum
Barber Osgerby Project Stories for the Design Museum DesignMuseum1
油
Edward Barber and Jay Osgerby established BarberOsgerby in 1996 after studying architecture together. Since then, they have designed furniture, lighting, and other products for many international companies. They are known for their innovative and award-winning designs. Some of their most notable projects include designing tables with colorful segmented aluminum tops for Established & Sons gallery and architectural designs for several H&M stores around the world.7227 la cartuja de granadaAgendaMagica Mar
油
Este documento describe una visita al monasterio de la Cartuja en Granada. Comienza con una breve introducci坦n hist坦rica sobre el monasterio, fundado en 1516. Luego detalla las diferentes 叩reas visitadas como el claustro, refectorio, capilla, sala capitular e iglesia, destacando obras de arte y detalles arquitect坦nicos. Concluye volviendo a la entrada y observando la nieve en la sierra.fisioterapia geri叩tricaCristal Hernandez
油
La fisioterapia geri叩trica contribuye a la prevenci坦n de un envejecimiento temprano teniendo en cuenta las necesidades fisiol坦gicas b叩sicas, de seguridad, sociales y su entorno aportando la ayuda para un r叩pido mejoramiento en alguna patolog鱈a. El fisioterapeuta tiene el rol de reincorporar a los pacientes de la tercera edad a sus actividades cotidianas generando autonom鱈a en su movilidad, independencia f鱈sica y funcional. La fisioterapia geri叩trica tambi辿n ayudaSignos 11Colegios Attendis
油
Este documento presenta informaci坦n sobre videojuegos dirigida a padres. Explica que los videojuegos son un fen坦meno mundial que influye en la formaci坦n de los ni単os y que los padres deben informarse sobre los contenidos de los juegos antes de comprarlos. Tambi辿n describe nuevas consolas como la Wii que fomentan el juego en familia y ofrece consejos sobre alternativas al uso excesivo de videojuegos.Gu鱈a para realizar la Voluntad Vital AnticipadaHospInfantaMargarita
油
Este documento resume la legislaci坦n y directrices sobre voluntades vitales anticipadas en Espa単a y Andaluc鱈a, incluyendo la Ley 41/2002 sobre la autonom鱈a del paciente, la Ley 2/2010 sobre derechos y garant鱈as de la dignidad de la persona en el proceso de muerte, y el Decreto 59/2012 sobre el Registro de Voluntades Vitales Anticipadas de Andaluc鱈a. Adem叩s, proporciona una gu鱈a detallada sobre c坦mo completar una declaraci坦n de voluntad vital anticipada y registrarla.Is Google Analytics Giving You The Whole Story?
Is Google Analytics Giving You The Whole Story?Kate Hamilton-Miller
油
The document discusses the Fresh Intelligence Roundtable series focusing on Google Analytics, including the upgrade to Universal Analytics and the benefits it provides such as improved tracking and reporting features. It covers audience insights, traffic sources, content engagement, event tracking, and how to calculate click-through rates for advertisements. It also mentions the option to receive email reports for analytics data.Cyberbullying film 260
Cyberbullying film 260teaganmclaren
油
Cyberbullying involves using electronic communication to bully or intimidate others. The rise of digital technology and social media has enabled bullies to target victims more easily and accessibly. Teenagers especially are spending increasing amounts of time online, opening more opportunities for cyberbullying. Common cyberbullying behaviors include sending threatening messages, posting embarrassing photos without consent, impersonating others online, and tricking someone into revealing private information. Victims of cyberbullying are at higher risk for depression, anxiety, poor school performance, substance abuse, and low self-esteem. Resources are available for those being cyberbullied or knowing someone who is.Volvo V50 Santa Barbara
Volvo V50 Santa BarbaraSanta Barbara Volvo
油
The document presents the Volvo V50 sportswagon, highlighting its unique blend of aesthetics and functionality, designed with the driver's needs in mind. It boasts features such as a high-quality audio system, versatile cargo space, and advanced safety technologies that promote a fun and secure driving experience. Additionally, the V50 emphasizes environmental consideration and innovation, aiming for reduced emissions and safety improvements, reflecting Volvo's commitment to a better driving future.Mobile Test Automation
Mobile Test AutomationAndreas Jakl
油
The document presents a comprehensive overview of mobile test automation, emphasizing its importance in ensuring app functionality across various devices and OS versions. It discusses testing strategies, tools, and methodologies, including the significance of user feedback and the impact of app updates on customer retention. Additionally, it highlights automated testing capabilities through platforms like Xamarin Test Cloud and other tools to enhance testing efficiency and reliability.#CPAF15 WS7: Addressing climate change issues in fisheries and aquaculture in...
#CPAF15 WS7: Addressing climate change issues in fisheries and aquaculture in...Technical Centre for Agricultural and Rural Cooperation ACP-EU (CTA)
油
Ad
Similar to The cardiac cycle (20)
The cardiac cycle colstons
The cardiac cycle colstonsandymartin
油
The document describes the cardiac cycle, which is the sequence of events in one heartbeat. It defines systole as the period of ventricular contraction and diastole as the period of ventricular relaxation. The cycle begins with atrial systole, where the atria contract and blood passes to the relaxed ventricles. This is followed by ventricular systole, where the ventricles contract and force blood out through the arteries. Finally, during diastole the ventricles relax and refill with blood from the veins, completing the cycle.Cardiac cycle
Cardiac cycleDARSANALAL
油
The cardiac cycle refers to the alternating contraction and relaxation of the heart's chambers during one heartbeat. It involves two main phases: systole, when the ventricles contract, and diastole, when the ventricles relax and refill with blood. The cycle is precisely coordinated by electrical signals from the heart's conduction system and involves the opening and closing of valves between the chambers.cardiac cycle basics and anesthetic implication
cardiac cycle basics and anesthetic implicationDrHarshithaGM
油
The document presents a detailed overview of the cardiac cycle, describing the heart's main functions, the sequence of mechanical and electrical events during each heartbeat, and the roles of valves and pressures. It outlines the phases of systole and diastole, providing insights into the timing and significance of each phase for blood flow and heart function. Additionally, it explains heart sounds and their relation to valve closures and atrial pressure changes during the cycle.Cardiac cycle
Cardiac cycleAqsa Rabbani
油
The document discusses the cardiac cycle and its four stages: atrial diastole, atrial systole, ventricular systole, and ventricular diastole. It describes the opening and closing of valves between the atria and ventricles that allow blood to flow in and be pumped out. Key waves in an ECG like the P, QRS, and T waves correspond to electrical signals during contraction and relaxation of the heart chambers. The cardiac output and factors that can increase or decrease it are also covered, along with the Frank-Starling law and conditions of hypoeffective and hypereffective heart function.Cardiac cycle topic 際際滷Share
Cardiac cycle topic 際際滷Share AsgharullahKhan
油
The document discusses the cardiac cycle and its four stages: atrial diastole, atrial systole, ventricular systole, and ventricular diastole. It describes the opening and closing of valves between the atria and ventricles that allow blood to flow in and be pumped out. Key waves in an ECG like the P, QRS, and T waves correspond to electrical signals during contraction and relaxation of the heart chambers. The cardiac output and factors that can increase or decrease it are also covered, along with the Frank-Starling law and conditions of hypoeffective and hypereffective heart function.CARDIAC CYCLE.pptx
CARDIAC CYCLE.pptxRakshatNayak1
油
The cardiac cycle describes the alternating contraction and relaxation of the atria and ventricles to pump blood through the body. Each cycle is initiated by spontaneous electrical impulses originating in the sinoatrial node. The cycle can be divided into atrial and ventricular events. When the heart rate is 72 beats per minute, each cycle lasts 0.8 seconds, with atrial systole lasting 0.1 seconds, atrial diastole 0.7 seconds, ventricular systole 0.3 seconds, and ventricular diastole 0.5 seconds. The phases of the cardiac cycle include ventricular systole with isovolumic contraction, rapid ejection and slow ejection, and ventricular diastole with isovolumicCVS Item 2.pdf
CVS Item 2.pdfashiqurrahman632074
油
The document discusses the cardiac cycle, including definitions, events, pressure and volume changes. It describes the four heart sounds, their causes, characteristics and significance. It also discusses the electrocardiogram (ECG), including the waves that make up a normal ECG tracing and their significance. Key events of the cardiac cycle include atrial systole, ventricular systole and diastole. Pressure and volume changes occur in the atria, ventricles, aorta and pulmonary artery. The four heart sounds are produced by specific events in the cardiac cycle. An ECG traces the electrical activity of the heart and can be used to diagnose cardiac conditions.Cardiac cycle Physiology
Cardiac cycle PhysiologyRaghu Veer
油
The cardiac cycle describes the sequence of events in one heartbeat. It begins with spontaneous generation of an action potential in the sinus node which then spreads to the atria and ventricles. Each cycle consists of a diastolic phase where the heart relaxes and fills with blood, followed by a systolic phase where the heart contracts and pumps blood out. Key events include atrial systole, isovolumetric contraction, ventricular ejection, reduced ejection, isovolumetric relaxation, and rapid ventricular filling. The cycle repeats with each heartbeat to circulate blood through the body.Cardiac cycle
Cardiac cycleSuprabha Panda
油
The cardiac cycle involves four main phases: atrial systole, ventricular systole, ventricular diastole, and atrial diastole. During atrial systole, the atria contract and push blood into the ventricles. In ventricular systole, the ventricles contract and pump blood out of the heart. This is followed by ventricular diastole when the ventricles relax and refill with blood. Finally, during atrial diastole the atria relax and refill with blood to prepare for the next cycle. The cycle repeats with contraction and relaxation of the atria and ventricles in precise sequence to efficiently pump blood through the body.Cardiac Cycle.pdf
Cardiac Cycle.pdfNitin98008
油
The document discusses the cardiac cycle, defined as a sequence of events during a heartbeat, consisting of systole (contraction) and diastole (relaxation). It outlines the subdivisions and durations of these phases, detailing the mechanical and electrical events involved, as well as the corresponding heart sounds. Overall, it emphasizes the importance of understanding the cardiac cycle for insights into heart function and blood flow.Cardiac Cycle 5.pptx
Cardiac Cycle 5.pptxParithisanthi
油
The cardiac cycle describes the regular relaxation and contraction of the heart. It consists of systole, when the ventricles contract to pump blood out of the heart, and diastole, when the ventricles relax and refill. During systole, the atrioventricular valves are closed and semilunar valves are open to allow blood to be ejected from the ventricles. During diastole, the atrioventricular valves open to allow blood to fill the ventricles passively from the atria as well as actively when the atria contract. The cycle repeats approximately 60-80 times per minute.physiological event during cardiac cycle
physiological event during cardiac cycleDr .Priyanka Verma
油
phases of cardiac cycle,pressure volume relationship,JVP,ECG,HS changescardiac cycle PDF Systole and diastole
cardiac cycle PDF Systole and diastolerohidihsan1
油
The cardiac cycle consists of alternating contractions and relaxations of the heart's atria and ventricles, initiating from the fourth gestational week and encompassing phases such as systole and diastole. Key phases include atrial contraction for ventricular filling, isovolumetric contraction, and rapid and slow ventricular ejection, all of which are linked to specific heart sounds and pressure changes within the heart and aorta. A graphical representation of the cardiac cycle illustrates the relationships between atrial, ventricular, and aortic pressures throughout the cycle.Cardiac cycle - systole & diastole
Cardiac cycle - systole & diastoleneeru02
油
The cardiac cycle describes the repeating sequence of events in the heart during one heartbeat. It consists of two main phases - diastole and systole. During systole, the ventricles contract and eject blood into the arteries. During diastole, the ventricles relax and fill with blood from the atria. The cardiac cycle is initiated by atrial systole, when the atria contract and push additional blood into the ventricles. This is followed by ventricular systole, when the ventricles contract and pump blood out of the heart. Between these events is diastole, when the heart relaxes and refills with blood.Cardiaccyclephysiology4dpt 140126025440-phpapp02
Cardiaccyclephysiology4dpt 140126025440-phpapp02pankti gajera
油
The cardiac cycle refers to the sequence of events that occur from one heartbeat to the next, consisting of diastole (relaxation and filling of the heart) and systole (contraction and ejection of blood). Important phases include atrial and ventricular systole/diastole, with specific time intervals for each event, such as atrial systole lasting 0.11 seconds and ventricular systole lasting 0.27 seconds. Changes in intra-atrial and intra-ventricular pressures are crucial for the opening of valves and effective blood circulation.Cardiac cycle physiology ppt
Cardiac cycle physiology pptWaleedKhan45124
油
The cardiac cycle describes the mechanical and electrical events of the heart during one complete heartbeat. It includes atrial and ventricular relaxation and filling followed by contraction and ejection. The normal cardiac cycle is approximately 0.8 seconds long and divided into systole which is 1/3 of the cycle and diastole which is 2/3. It involves phases such as isovolumetric contraction, ejection, isovolumetric relaxation and filling. Events in the cardiac cycle produce the four characteristic heart sounds.仄舒仍ﾐ歳歳夷姉狐从
仄舒仍ﾐ歳歳夷姉狐从Liz_Oks
油
The heart has four chambers divided by a septum. It pumps blood through two circuits - pulmonary and systemic. Each heartbeat consists of three phases: atrial systole where the auricles contract and push blood into the ventricles, ventricular systole where the ventricles contract and pump blood out, and joint diastole where all chambers relax simultaneously. The heart beats 60-72 times per minute in adults with each cycle lasting around 1 second total.Lecture 3 - SHS.108.pptx CARDIOVASCULAR DISORDER
Lecture 3 - SHS.108.pptx CARDIOVASCULAR DISORDERjiyaj762
油
The cardiac cycle encompasses the sequence of events that occur during each heartbeat, consisting of systole (contraction) and diastole (relaxation), with an average duration of about 0.8 seconds at a normal heart rate of 72 beats per minute. Key phases include atrial and ventricular events, with pressures and volumes changing throughout to facilitate blood flow from the atria to the ventricles and into the aorta and pulmonary arteries. Understanding these phases and their significance is crucial for assessing cardiovascular function and conditions like heart failure or arrhythmias.Ad
The cardiac cycle
- 1. The cardiac cycle Describing the sequence of events in one heart beat
- 2. Definitions 油油油油 Systole = period of ventricular contraction. Diastole = period of ventricular relaxation. NOTE:油 Normally diastole is longer than systole.
- 3. Cardiac cycle General Principles. 油油油油 Contraction of the myocardium generates pressure changes which result in the orderly movement of blood. Blood flows from an area of high pressure to an area of low pressure , unless flow is blocked by a valve. Events on the right and left sides of the heart are the same, but pressures are lower on the right.
- 4. Atrial systole The heart is full of blood and the ventricles are relaxed Both the atria contract and blood passes down to the ventricles The atrio-ventricular valves open due to blood pressure 70% of the blood flows passively down to the ventricles so the atria do not have to contract a great amount.
- 5. Ventricular systole The atria relax. The ventricle walls contract, forcing the blood out The pressure of the blood forces the atrio-ventricular valves to shut (producing the heart sound lub)
- 6. Ventricular systole The pressure of blood opens the semi-lunar valves. Blood passes into the aorta and pulmonary arteries.
- 7. Diastole The ventricles relax Pressure in the ventricles falls below that in the arteries Blood under high pressure in the arteries causes the semi lunar valves to shut. This produces the second heart sound, dub. During diastole, all the muscle in the heart relaxes.
- 8. Blood from the vena cava and pulmonary veins enter the atria. The whole cycle starts again.
- 9. 油
- 10. Cardiac cycle Match the letter on the graph to the following events Semi-lunar valves open Atrio-ventricular valves close, Semi-lunar valves close Atrio-ventricular valves open
- 12. atrio-ventricular valves open atrio-ventricular valves close
- 13. atrio-ventricular valves open atrio-ventricular valves close semi-lunar valves open
- 14. atrio-ventricular valves open atrio-ventricular valves close semi-lunar valves open semi-lunar valves close