Objective To investigate the early application value of echocardiography( UCG) after orthotopic heart transplantation( OHT). Methods A total of 29 patients were monitored by UCG early after OHT. On the 1st,7th,14 th,30thday after operation,the left ventricular end-diastolic diameter( LVDd) and right ventricular end-diastolic diameter( RVDd),interventricular septal thickness( IVST),left ventricular posterior wall thickness( LVPWT) and the tricuspid regurgitation area( TRA) were measured,and the left ventricu...