Which heart rate range defines tachycardia?

Tachycardia is defined as a condition where the resting heart rate exceeds the normal range. Normal resting heart rates typically fall between 60 and 100 beats per minute (bpm). Therefore, when a person's heart rate is above 100 bpm, it can be classified as tachycardia.

The definition of tachycardia is particularly highlighted by the range of 101 to 160 bpm, which fits within the common parameters for this condition. Heart rates in this range can indicate heightened physiological stress or underlying cardiovascular issues.

Rates over 160 bpm may be classified as severe tachycardia or can indicate other serious conditions, but the broader classification of tachycardia encompasses rates starting at 101 bpm. The lower heart rate range of 40-60 bpm designates bradycardia, not tachycardia.