Atrial flutter is a disorder which causes the heart to beat out of its normal rhythm. Learn more here.

Atrial fibrillation symptoms vs. flutter Atrial flutter is another type of abnormal heart rhythm. It happens when a short circuit causes the upper chambers of your heart (atria) to pump too fast.

A population-based study showed that male sex, increasing age, and cardiac risk factors increased the risk of atrial fibrillation or flutter associated with hyperthyroidism.

Except for atypical atrial flutter, there were no complications attributable to circumferential pulmonary-vein ablation.