Diastolic heart failure
Trouble arises when the heart can't properly relax.
Relaxation is every bit as important for your heart as it is for the rest of you. If for some reason the heart has trouble relaxing between beats, then it can't fill completely. Less blood pumped with each contraction sets the stage for a "new" type of heart failure that goes by many names: diastolic heart failure, heart failure with normal ejection fraction, heart failure with preserved systolic function, and others.