Atrial tachycardias are an uncommon cause of supraventricular tachycardia, accounting for around 5-15% of cases depending on whether the patient has congenital heart defects. Atrial tachycardias can be focal, originating from a single site, or macroreentrant utilizing existing anatomical barriers; 3D mapping systems have improved localization of focal atrial tachycardia origins by providing better atrial anatomy visualization. Successful focal atrial tachycardia ablation is identified by termination of tachycardia within 10 seconds of beginning radiofrequency delivery and inability to reinduce tachycardia with drug provocation.
The document lists 13 famous gardens around the world, including Versailles in Paris, France; The Garden of Cosmic Speculation in Scotland, UK; Boboli Gardens in Florence, Italy; Rikugien Gardens in Tokyo, Japan; Claude Monet Gardens in Giverny, West Paris, France; Butchart Gardens in Victoria, BC, Canada; Kirstenbosch Botanical Gardens in Cape Town, South Africa; Guarapiranga Sacred Grounds in Sao Paulo, Brazil; Yu Gardens in Shanghai, China; Exbury Gardens in New Forest, England; Keukenhof Gardens in Holland; Mirabell Garden in Salzburg, Austria; and Zen Garden of Ryoan Temple in Kyoto
Erik Johansson is a 23-year-old Swedish student who creates impossible pictures that play tricks on the viewer's mind. His pictures use optical illusions and unusual perspectives to make scenes and objects appear in ways that defy perception and logic.