Question

The duration of a cardiac cycle is

• A. 0.8 sec
• B. 0.9 sec
• C. 0.6 sec
• D. 0.7 sec

Answer 1

The correct option is A 0.8 sec

Cardiac cycle comprises a complete relaxation and contraction of both the atria and ventricles (chambers of the heart). The sequential event of contraction and relaxation in the heart which is cyclically repeated is called the cardiac cycle. The duration of a cardiac cycle is 0.8 seconds.