The rhythm is either sinus rhythm or not sinus rhythm. Sinus rhythm refers to the origination of the electrical activity coming from the sinus node — also known as the sinoatrial node, or SA node.

For two decades, the 37-year-old father and husband has dealt with an irregular heart rhythm that was difficult to diagnose. The avid runner tried stress tests and EKGs to no avail because of ...

An idioventricular rhythm — not accelerated — has a heart rate of < 60 beats per minute. AIVR is hemodynamically stable, and thus no specific treatment is needed. This rhythm meets all of the ...