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Systole

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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Ventricular systole is the power generating phase of the cardiac cycle during which the ventricle is contracting.

Systole is defined differently according to how one observes the heart:

  • structural definition:
    • the ejection phase of ventricular contraction beginning with mitral valve closure and ending with aortic valve closure

  • functional definition:
    • the period of myocyte contraction

These two definitions are not equivalent because of the period of isovolumic contraction before ejection of blood occurs.

Click here for an example ECG and further information

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