The aims of this study was monitor the changes of pulmonary artery pressure, and clinical of acute right ventricular failure due to pulmonary hypertension crisis after cardiac surgery. The results showed that, all patients had a positive response, results in a mean (+ or - SD) decrease of PAPs from 79.5 + or - 13 to 44 + or - 16.1 mmHg (p 0.001), PAPm from 54.9 + or - 11.8 to 33.1 + or - 13.2 mmHg (p 0.001), PAPd from 38.3 + or - 13.4 to 24.4 + or - 11.3mmHg (p 0.001).5/27 patients had been to acute right ventricula failure due to pulmonary hypertension crisis (18.5 percent), 1 patient had died after opened sternum (3.7 percent). In conclusion, acute right ventricular failure due to pulmonary hypertension crisis may be caused death postoperative.