Pressure volume curve


Phases of the PV Loop: 


Phase l - Ventricular filling: This phase starts with the opening of the mitral valve and ends with its closure.


Phase ll - Isovolumetric contraction: This phase begins with the closure of the mitral valve and ends with the opening of the aortic valve.


Phase lll - Ventricular ejection: This phase starts with the opening of the aortic valve and ends with its closure.


Phase lV - Isovolumetric relaxation: This phase begins with the closure of the aortic valve and ends with the opening of the mitral valve.



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