Nearly 14 million Americans live with arrhythmias. Learn to identify the warning signs of these common heart rhythm disorders ...

This ECG has a narrow QRS complex initally, then a fast heart rate, regular rhythm and no identifiable P wave activity which suddenly turns to a wide complex in a left bundle branch block pattern.

Note: The heart rate is different from the heart rhythm, which refers to the thump ... such as: Here is a chart showing how the normal resting heart rate changes with age: In general, a heart ...

View this interactive chart on Fortune.com Smartwatches ... it may not be a reflection of your resting heart rate, but an ...

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 ...