Parameters measured by echocardiogram.

All data were mean±SD. LVDd (mm): left ventricular end-diastolic dimension; LVSd (mm): left ventricular end-systolic dimension; IVS (mm): intraventricular septal wall; LVPW (mm): left ventricular posterior wall thickness; FS: fractional shortening; A wave (cm/s): peak late diastolic flow velocity, E/A: ratio of peak early diastolic filling velocity to peak velocity at atrial contrations.**P*P##P#P