Diastolic heart failure

IM/Thera

1. Contraction power is OK but relaxation (diastole) is reduced    ⇒   
2. ventricular cavity gets smaller    ⇒   
3. less  blood at the end of diastole, so SV reduced, CO also reduced.( vent. is small & stiff)

Ejection fraction normal

• Low SV (stroke volume)
• Low CO
• Normal or preserved EF

Diastolic failure is also called heart failure with preserved EF (HFpEF)

Feature	Systolic Heart Failure	Diastolic Heart Failure
Stroke Volume	Low	Low
Cardiac Output	Low	Low
Ejection Fraction	Low	Normal
Cardiomegaly	Present	Absent
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