If the duration of the atrial systole is 0.1 sec and that of complete diastole is 0.4 sec, then how does one cardiac cycle complete in 0.8 sec?

1. It takes 0.8 seconds to complete a single cardiac cycle.

2. The cardiac cycle comprises three crucial phases: atrial systole, ventricular systole, and joint diastole.

3. Under normal conditions, atrial systole lasts for 0.1 second, followed by ventricular systole lasting 0.3 seconds, and joint diastole, or complete diastole, extending for approximately 0.4 seconds.

4. Consequently, the entire cardiac cycle concludes within a duration of 0.8 seconds.