What is the maximum allowable heart rate for a person experiencing tachycardia?

Tachycardia is defined as a resting heart rate that exceeds the normal upper limit of 100 beats per minute (bpm) in adults. The condition signifies that the heart is beating faster than normal, which can occur due to various physiological or pathological reasons.

The correct option reflects that the maximum allowable heart rate for an individual experiencing tachycardia is categorized as anything over 100 bpm. This definition is integral for identifying the presence of tachycardia and diagnosing potential underlying health issues.

The other options represent values that are either within or below the threshold that defines tachycardia. Therefore, they do not meet the criteria that distinguish tachycardia from a normal heart rate. Understanding these distinctions is crucial in medical imaging and patient care, as it highlights the importance of monitoring heart rates and recognizing abnormal conditions.