Conversation so far:
Tell me about the types of irregular heart beat.
Atrial fibrillation is a very common irregular heart rhythm that causes the atria, the upper chambers of the heart, to contract abnormally. Atrial flutter. This is an arrhythmia caused by one or more rapid circuits in the atrium.
How serious is an irregular heart beat?
Coronary artery disease can cause dangerous arrhythmias like atrial fibrillation, or AFib. It's a rapid, quivering heartbeat that can lead to heart palpitations, blood clots, heart attack and stroke.
What are the different types of tachycardia?
Atrial fibrillation. Atrial fibrillation is a rapid heart rate caused by chaotic, irregular electrical impulses in the upper chambers of the heart (atria). ...Atrial flutter. ...Supraventricular tachycardia (SVT). ...Ventricular tachycardia. ...Ventricular fibrillation.
What is atrial flutter?
Atrial flutter (AFL) is a type of abnormal heart rate, or arrhythmia. It occurs when the upper chambers of your heart beat too fast.

Question: What causes it?
Self-contained rewrite: What causes irregular heartbeat?