Arrhythmias are heart rhythm abnormalities that occur when the normal electrical wiring of your heart fails to work normally. Your heart rhythm determines how your heart beats. As a result, arrhythmias can lead to failure or absence of effective beating. They can be harmless or they can cause various symptoms, loss of consciousness, or even death.

Arrhythmias can come in various different forms and names based on what the rhythm is and where they originate from. These abnormalities can involve the heart being too fast, too slow or irregular. Normal heart rate is 60 to 100 beats per minute. Bradycardia refers to heart rates less than 100 beats per minute. Tachycardia refers to heart rates greater over 100 beats per minute.