Thirty percent to fourty percent of patients with chronic heart failure have normal or relatively normal left ventricular ejections fractions. Now these patients have been
systematically excluded from heart failure, named diastolic heart failure (DHF). DHF occurs when signs and symptoms of heart failure are present but left ventricular systolic function is preserved (i.e. ejection fraction greater than 45 percent). Inmost, left ventricular diastolic
dysfunction (DD) plays a maj...