Tachycardia

**Definition:** 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.

**Tree numbers:** - C14.280.067.845 - C14.280.123.875 - C23.550.073.845