Arrhythmia

group of conditions in which the heartbeat is irregular, too fast, or too slow

Arrhythmia (commonly called irregular heartbeat) is the name for a number of conditions, where the heartbeat is not normal. It may be too fast (tachycardia); too slow (bradycardia); or the heart may not beat in its regular rhythm.

Different forms of cardiac arrhythmia shown in an Electrocardiogram