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HF may occur as a result of
What myocardial contractility (systolic dysfunction, commonly characterized as reduced left ventricular ejection fraction)
Increased ventricular stiffness or impaired myocardial relaxation.
A variety of other cardiac abnormalities, including obstructive or regurgitent valvular disease, intracardiac shunting, or disorders of heart rate or rhythm.
States in which the heart is unable to compensated for increased peripheral blood flow or metabolic requirements.