The clinical and echocardiographic characteristics of the younger and older cohorts.

Data are or mean or standard error; HTN = hypertension; DM = diabetes mellitus; CAD = coronary artery disease; IVSd = inter-ventricular septal diameter in diastolic phase; LVPWd = left ventricular posterior wall diameter in diastolic phase; LVIDd = left ventricular internal diastolic dimension; LVIDs = left ventricular internal systolic dimension; e = early diastolic mitral inflow velocity; e/a = the ratio of early to late diastolic mitral inflow velocity; e′ = the average early diastolic velocity of mitral annulus in tissue Doppler; LVEF = left ventricular ejection fraction.