What is an Arrhythmia?Open Document
An arrhythmia is an abnormal heart rhythm. It may feel like fluttering or a brief pause. It may be so brief that it doesn't change your overall heart rate (the number of times per minute that your heart beats). Or it can cause the heart rate to be too slow or too fast. Some arrhythmias don't cause any symptoms. Others can make you feel lightheaded or dizzy.