Tachycardia
Synonyms
Tachyarrhythmia
Tachyarrhythmias
Tachycardias
Abnormally rapid heartbeat, usually with a HEART RATE above 100 beats per minute for adults. Tachycardia accompanied by disturbance in the cardiac depolarization (cardiac arrhythmia) is called tachyarrhythmia.