What is the normal heart rate range for adults on an ECG?

• A. 40 to 60 beats per minute
• B. 60 to 100 beats per minute
• C. 70 to 90 beats per minute
• D. 50 to 120 beats per minute

Answer: (B)

The normal heart rate range for adults as observed on an ECG is between 60 to 100 beats per minute. This range is considered normal because it represents the typical functioning of the heart under resting conditions where the cardiac output is adequate to meet the body's demands. Within this range, the heart can efficiently pump blood throughout the body, supplying oxygen and nutrients while removing waste products.

A heart rate below 60 beats per minute may indicate bradycardia, which can occur in well-trained athletes or may signal an underlying medical condition. Conversely, a heart rate exceeding 100 beats per minute is classified as tachycardia, which can develop from various factors such as stress, exercise, or medical issues. Therefore, the specified range of 60 to 100 beats per minute is crucial for maintaining optimal cardiovascular health.