Le document traite de la physiologie cardiovasculaire, en se concentrant sur les propriétés du c?ur telles que l'excitabilité, la conductivité, la contractilité et l'automatisme. Il explique les mécanismes électrophysiologiques, notamment le potentiel d'action, les phases de dépolarisation et de repolarisation, et le fonctionnement des canaux ioniques. Enfin, il aborde l'importance de l'automatisme cardiaque et les principes de l'électrocardiogramme (ECG).
Le document traite de la physiologie cardiovasculaire, en se concentrant sur les propriétés du c?ur telles que l'excitabilité, la conductivité, la contractilité et l'automatisme. Il explique les mécanismes électrophysiologiques, notamment le potentiel d'action, les phases de dépolarisation et de repolarisation, et le fonctionnement des canaux ioniques. Enfin, il aborde l'importance de l'automatisme cardiaque et les principes de l'électrocardiogramme (ECG).
This document appears to be in Chinese and discusses a herbal medicine practitioner named Zhou Sunhong. However, as the document is in Chinese I do not have enough contextual information to provide a meaningful 3 sentence summary.
Clonidine is an antihypertensive medication that lowers blood pressure by stimulating alpha2-adrenergic receptors, reducing sympathetic nervous system activity. However, it is associated with side effects such as drowsiness, bradycardia, and orthostatic hypotension, making it unsuitable as a first-line treatment for patients over 65, according to the Beers Criteria. It may be considered for resistant hypertension and specific elderly patients with symptoms like hyperactivity or tachycardia.
Cefiderocol is a siderophore cephalosporin antibiotic that can chelate iron. It tricks gram-negative bacteria (GNB) into taking it up by mimicking iron. Its cephalosporin portion then inhibits cell wall synthesis. It has activity against many multidrug-resistant gram-negative pathogens like ESBL, CRAB, CRKP, CRPA. It can be used to treat urinary tract infections and hospital-acquired or ventilator-associated pneumonia. The dosage is 2g every 8 hours via intermittent IV infusion over 3 hours. Dosage needs to be adjusted based on creatinine clearance. For treatment of infections caused by carbapenemase-producing GNB, alternative