LEFT VENTRICULAR TORSION SHEAR ANGLE VOLUME APPROACH FOR NON-INVASIVE EVALUATION OF DIASTOLIC DYSFUNCTION IN PRESERVED EJECTION FRACTION

Background: Diagnostic accuracy of echocardiography for evaluating diastolic dysfunction is limited in preserved left ventricular ejection fraction (LVEF). We previously proposed the relationship of normalized rate of change in LV torsion shear angle ( φ’ ) to corresponding rate of change in LV