For 26 months since August 1991 , 10 consecutive patients with congenital left ventricular outflow tract obstruction underwent corrective surgery in Pusan Paik Hospital.
Their ages ranged from 2 to 18 years. There were 6 male and 4 female patients. According to stenotic site, obstruction were classified into supravalvular(n=5), subvalvular(n=4), valvular stenosis (n=1). We have performed patch enlargement of
ascending
aorta(n=2), supravalvular membrane resection and patch enlargement of ascending aorta(n=3), subvalvular membrane resection(n=2), subvalvular membrane resection and left ventricular myectomy(n=2) and aortic annuloplasty with Dacron patch and
aortic
valve
replacement(n=1).
Preoperative mean value of systolic pressure gradient were 85.0*29.2mmHg(supravalvular), 70.0mmHg(valvular), 72.5*22.5 mmHg(subvalvular), and 78.5*24.3mmHg(total). Postoperative mean value of systolic pressure gradient were
31.0*8.9mmHg(supravalvular),
0mmHg(valvular0, 15.0*10.8mmHg(subvalvular), and 21.5*13.9mmHg(total). Postoperative systolic pressure gradient was decreased significantly(p=0.001).
Postoperative course and short-term follow up results were good except one case of transient heart failure. (Korean J Thoracic Cardiovas Surg 1994; 27:576-80)
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