A harmless early extra heartbeat and a chaotic, racing, potentially lethal heart rhythm are obviously two different things. Yet, both fit the medical definition of an arrhythmia. "The majority of ...

An arrhythmia is a problem with your heartbeat’s rhythm and/or rate. Some arrhythmias are nothing to worry about, others should be monitored, and some need to be addressed immediately. The heart has ...

The heart is a muscle about the size of your fist that pumps blood around the body. When the heart is functioning properly, it has a specific rhythm controlled by a mass of specialized heart tissue ...

MANY common arrhythmias observed in both atria and ventricles are similar although the atrial types have a few important distinguishing features. Thus, so far as therapy is concerned, the atrial ...

A randomized trial that compared previously used and new pacemakers in patients found the reconditioned devices were as safe and effective as new pacemakers, potentially offering affordable options ...

Sinus rhythm (a.k.a. normal sinus rhythm) refers to the normal heart beat originating from the sinoatrial node. This is manifested as an upright P wave in lead II of the ECG. Sinus bradycardia occurs ...

Having an accelerated junctional rhythm occurs when the atrioventricular node in your heart beats too quickly. It happens as a result of damage to your heart’s primary natural pacemaker. There’s no ...

April 29, 2004 — The incidence of maternal cardiac arrhythmias in healthy women during labor is high, but with the exception of isolated atrial premature beats (APBs), no higher than that in healthy ...