What is an arrhythmia?Know the different types of arrhythmias and their mechanisms

An arrhythmia is a problem with the rate or rhythm of the heartbeat. During an arrhythmia, the heart can beat too fast, too slow, or with an irregular rhythm. This happens because the electrical signals that control the heartbeat are not working properly.

There are several types of arrhythmias, including:

1. Atrial fibrillation: This is a very common type of arrhythmia where the heart's upper chambers (the atria) beat irregularly.

2. Atrial flutter: This is similar to atrial fibrillation, but the rhythm in your atria is more organized and less chaotic than the abnormal patterns common with atrial fibrillation.

3. Supraventricular tachycardia: This is a series of rapid heartbeats that begin in the upper chambers of the heart.

4. Ventricular tachycardia: This is a rapid heart rhythm that originates with abnormal electrical signals in the lower chambers of the heart.

5. Ventricular fibrillation: This is an irregular, chaotic rhythm in your ventricles. It is the most serious type of heart rhythm disorder and can lead to sudden cardiac arrest.

6. Bradycardia: This is a slower than normal heart rate. It's a type of arrhythmia.

7. Tachycardia: This is a faster than normal heart rate. It's another type of arrhythmia.

The mechanisms of arrhythmias are complex and can involve a variety of factors. Some arrhythmias are caused by a problem with the heart's electrical system. Others may be caused by heart disease, stress, certain medications, or even genetics. In some cases, the cause of an arrhythmia may not be known.