XXXX : surgical outcomes and follow-up results.

@entity1 @entity4809 @entity1757 @entity337 @entity204 @entity3555 @entity616
@entity4809 , which is an obstructing lesion of the left ventricular outflow tract, remains a surgical challenge. The recurrence rate is high despite sufficient conventional resection. We retrospectively reviewed the results of surgery for @entity4809 at our institution from September 1995 through March 2001. Twenty-one @entity1 with this lesion underwent surgical treatment during this period. Excision of the fibromuscular membrane with myectomy was performed in all of the @entity1 . Follow-up in all @entity1 ranged from 7 to 67 months (mean follow-up period, 39.57 +/- 15.46 months). The mean systolic gradient between the left ventricle and the aorta decreased from 59.23 +/- 35.38 mmHg preoperatively to 9.47 +/- 9.91 mmHg postoperatively. There was no instance of @entity616 that required a permanent pacemaker, nor of @entity3555 . There was no early or late @entity204 . A 22nd @entity1 , who had 3+ @entity337 , required aortic valve replacement and was excluded from the study. Two of the @entity1 (9.5%) underwent reoperation because of recurrent gradient and residual @entity1757 . Our results suggest that fibromuscular membrane excision combined with myectomy in @entity1 with @entity4809 produces sufficient relief of obstruction with low morbidity.
