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Diastole

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Ventricular diastole is the passive filling phase of the cardiac cycle.

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

  • structural definition:
    • the filling phase of ventricular relaxation between aortic valve closure and mitral valve closure

  • functional definition:
    • myocyte relaxation

These definitions are not identical because of the period of isovolumic relaxation of the ventricle before the mitral valve opens.

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