The Cardiac Cycle

The cardiac cycle is the sequence of events in one heartbeat.
 

In its simplest form, the cardiac cycle is the simultaneous contraction of the two atria, followed a fraction of a second later by the simultaneous contraction of the two ventricles. Systole is another term for contraction. The term for relaxation is diastole.

You are probably familiar with these terms as they apply to blood pressure readings. If we apply them to the cardiac cycle, we can say that atrial systole is followed by ventricular systole. There is, however, a significant difference between the movement of blood from the atria to the ventricles and the movement of blood from the ventricles to the arteries.

Followings are links to further understand the subject matter.


bcs.whfreeman.com/thelifewire/content/chp49/49020.html







library.med.utah.edu/kw/pharm/hyper_heart1.html





anatimation.com/cardiac/intro.html





www.mhhe.com/biosci/ap/seeleyap/student/olc2/ap_animation-quizzes.html


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Mukesh Patel