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Flashcards for cardiac physiology based on pressure-volume loops.
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Pressure Volume Loop: A to B
Isovolumetric contraction
Pressure Volume Loop: B to C
Ejection
Pressure Volume Loop: C to D
Isovolumetric relaxation
Pressure Volume Loop: D to A
Ventricular filling
End-Systolic Pressure-Volume Relationship (ESPVR)
Represented by the slope of the C point (end systole); indicates contractility.
Acute Heart Failure Impact on ESPVR
Results in a reduced end-systolic pressure-volume relationship (ESPVR)
End-Diastolic Pressure-Volume Relationship (EDPVR)
Measure of ventricular compliance that changes with diastolic function. Changes with compliance, generally with restrictive myopathies.
Stroke Volume Representation on Pressure-Volume Loop
Represented by the diameter of the loop.
Afterload Representation on Pressure-Volume Loop
Represented by the height of the curve.
Contractility
Represented by the end-systolic pressure-volume relationship.