[.38sw]

Tachycardia is not the same thing as atrial fibrillation. As you said, tachycardia is a very rapid heartbeat. Atrial fibrillation is when the atrial chamber of the heart doesn't contract properly, but the muscles in that portion of the heart "twitch" rather than beat in coordination with each other. When that happens, the blood is not actually pumped - there is no effedtive heartbeat.

[CDHart]

Thanks for the explanation. My husband had a bout with atrial fib about three weeks ago. Definitely got his attention. He is now on the treadmill every day, cut out all caffeine, and swears he will lose the 40 pounds that he's overweight.

Carolyn