Which term describes a fast heart rate exceeding 100 beats per minute?

Tachycardia is the medical term used to describe a fast heart rate that exceeds 100 beats per minute. This condition can occur due to various reasons, including exercise, anxiety, fever, or heart problems.

In contrast, tachypnea refers to an increased respiratory rate, while bradycardia indicates a slow heart rate, typically fewer than 60 beats per minute. Arrhythmia does not specifically denote a fast heart rate; rather, it indicates any irregularity in the heartbeat, which can include both fast and slow rates or erratic rhythms. Therefore, tachycardia is the precise term for a heart rate exceeding 100 beats per minute.