Systolic dysfunction Vs Diastolic dysfunction

[Ashwin Udyavar]

Normally, the heart stretches as it fills with blood (during
diastole), then contracts to pump out the blood (during systole). The
main pumping chambers in the heart are the ventricles.

Heart failure due to systolic dysfunction usually develops because the
heart cannot contract normally.(Systolic dysfunction is characterized
by a decrease in myocardial contractility) It may fill with blood, but
it cannot pump out as much of the blood it contains because the muscle
is weaker or because a heart valve malfunctions. As a result, the
amount of blood pumped to the body and to the lungs is reduced, and
the ventricle, usually enlarges.

Heart failure due to diastolic dysfunction develops because the heart
muscle stiffens (particularly the left ventricle) and may thicken so
that the heart cannot fill normally with blood. Consequently, blood
backs up in the left atrium and lung (pulmonary) blood vessels and
causes congestion. This leads to elevated filling pressures and
ultimately heart failure.

So coming to your question now:
INCREASED END DIASTOLIC PRESSURE is a feature of dyastolic dysfunction
while INCREASED END-DIASTOLIC VOLUME is a feature of systolic
dysfunction.

hope this is useful
regards
Ashwin