The sinoatrial (SA) node is the natural pacemaker of the heart. It generates electrical impulses that cause the heart’s chambers to contract, setting the heart rate. The SA node typically generates 60 ...
Second-degree heart block is a potentially serious but treatable condition affecting the heart’s electrical system. Treatment may require a pacemaker to stabilize the heart’s rhythm. Electrical ...
Consultant Fee/Honoraria/Speaker's Bureau - AstraZenca; Bayer AG; Bristol-Myers Squibb; Medtronic; Merck/Schering Plough; Boston Scientific Corporation; Daiichi-Sankyo/Elil Lilly and Company; Edwards ...
Reentry arrhythmia occurs when electrical signals in the heart deviate from their usual path, creating a loop that causes repeated stimulation and disrupts the heart’s rhythm. Symptoms of reentry ...
Your heart’s job is to keep your pulse steady to pump blood throughout your body. Sometimes your heart rate is slower when you’re relaxing, and sometimes it’s faster when you’re exercising or stressed ...
Figure 1. Three years after undergoing heart transplantation, a 44-year-old man presented with very frequent supraventricular extrasystoles (asterisks). Myocardial rejection and clinically significant ...
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