Assertion: heart failure's heart | /r/HasProperty | stiff
Facets:
Source sentences:
text: As the heart is stiff, it does not fill up with blood properly because it does not relax normally.
text: Heart failure with preserved ejection fraction: Also called diastolic heart failure or HFpEF, this type occurs when the heart is too stiff and doesn’t fill with blood normally.
text: The heart can be strong but stiff and not able to relax.