If you have sinus tachycardia or sinus bradycardia it doesn’t mean there's something wrong with your heart and you might not need treatment. Sinus bradycardias is when your heart beats in a regular way and 60 bpm or below Sinus tachycardia is when your heart beats in a regular way and faster than 100 bpm Heart blocks are caused by a delay or blockage in the conduction system between the top and bottom chambers of the heart which can cause a slow heart rate.Tachybrady syndrome (sick sinus syndrome) causes periods of very fast or slow heart beats.This can cause the top chambers to beat extremely fast, sometimes up to 300 beats per minute (bpm)

Atrial flutter is usually a fast heart rhythm where the top chambers of the heart contract at a very fast rate compared to the lower chambers.Most are due to electrical impulses not travelling normally from the top chambers of the heart to the bottom chambers of the heart Supraventricular tachycardia (SVT) is a very fast heart rhythm.Atrial fibrillation is the most common irregular, often fast heart rhythm.There are different types of arrhythmia, the most common are: This causes a heartbeat.Īrrhythmias are caused by a problem in this conduction system, which can make your heart beat too slowly, too quickly, or in an irregular way. An arrhythmia is an abnormal heart rhythm. Your heart is controlled by a conduction system which sends out electrical impulses.

Irregular heartbeat at night