Evaluation of postoperative cardiac function and long-term results in patients after aortic valve replacement for aortic valve disease with increased left ventricular mass

Objective: This clinical study was designed to evaluate the postoperative cardiac function in patients after aortic valve replacement for aortic valve disease with increased left ventricular mass.Methods: Aortic valve replacement was performed in 117 patients using the St. Jude Medical valve. Their valve lesion was aortic regurgitation in 71, and aortic stenosis in 46. The mean value of the left ventricular mass index was 272 g/m2. The 117 patients were subdivided into 4 groups according to their preoperative left ventricular mass index-Group I (n = 35) with aortic regurgitation and a large left ventricular mass index (≧ 273 g/m2), Group II (n = 36) with aortic regurgitation and a smalll left ventricular mass index Group HI (n = 19) with aortic stenosis and a large left ventricular mass index, and Group IV (n = 27) with aortic stenosis and a small left ventricular mass index. The cardiac function was evaluated by radionuclide ventriculography.Results: In a comparative study of postoperative parameters among the 4 groups, the postoperative systolic and diastolic parameters of Group I patients were more significantly impaired compared with these parameters of the other 3 groups. The postoperative values the left ventricular mass index were significantly higher in Group I than in the other 3 groups. The 10-year survival rate was significantly lower in Group I than in the other 3 groups (30± 22% in Group I).Conclusion: Aortic valve replacement is recommended for patients with eccentric hypertrophy in the adequate clinical phase of patients whose left ventricular mass index is less than 272 g/m2.