Heart arrhythmia, also known as arrhythmia, dysrhythmia, or irregular heartbeat, is a group of conditions in which the heartbeat is irregular, too fast, or too slow.
Too fast or too slow?
A heart rate that is too fast – above 100 beats per minute in adults – is called tachycardia and a heart rate that is too slow – below 60 beats per minute – is called bradycardia.
What are the symptoms?
Many types of arrhythmia have no symptoms. When symptoms are present these may include palpitations or feeling a pause between heartbeats. In more serious cases there may be lightheadedness, passing out, shortness of breath, or chest pain.
What can a heart arrhythmia cause?
While most types of arrhythmia are not serious, some predispose a person to complications such as stroke or heart failure. Others may result in cardiac arrest.