- 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.
- An abnormally rapid heartbeat, usually applied to a heart rate above 100 per minute.
- Excessive rapidity in the action of the heart.
- Rapid beating of the heart, usually defined as greater than 100 beats per minute.
- Tachycardia; an abnormally rapid heartbeat, usually applied to a heart rate above 100 per minute.
785 Symptoms involving cardiovascular system 
785.0 Tachycardia unspecified convert 785.0 to ICD-10-CM
