What triggers Flutter?

Atrial flutter results from an abnormal circuit inside the right atrium, or upper chamber of your heart. It beats extra fast, about 250-400 beats per minute .

It’s caused by an abnormal electrical circuit in the upper chambers of the heart (atria) that makes the atria beat quickly and flutter instead of fully squeezing. It can result in fast heart rates and a heart that doesn’t work as well as it should.

During atrial flutter, the atrium can beat up to 300 times a minute , and every second beat gets through to the ventricle, resulting in a pulse rate in the range of 150 beats per minute (the normal heart beat is 60 to 90 beats per minute).