Surgical treatment of subaortic stenosis: A seventeen-year experience

A. Serraf*, J. Zoghby, F. Lacour-Gayet, R. Houel, E. Belli, L. Galletti, C. Planche, M. N. IIbawi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Objective: The aim of the study was to analyze the long-term results of subaortic stenosis relief and the risk factors associated with recurrence and reoperation. Methods: One hundred sixty patients with subaortic stenosis underwent biventricular repair. Before the operation the mean left ventricle- aorta gradient was 80 ± 35 mm Hg, 57 patients had aortic regurgitation, and 34 were in New York Heart Association functional class III or IV. Median age at repair was 10 years. For discrete subaortic stenosis (n = 120), 39 patients underwent isolated membranectomy, 67 underwent membranectomy with associated septal myotomy, and 14 underwent septal myectomy. Tunnel subaortic stenosis (n = 34) was treated by myotomy in 10 cases, myectomy in 12, septoplasty in 7, Konno procedure in 3, and apical conduit in 2. Aortic valve replacement was performed in 6 cases, mitral valve replacement in 2 cases, and mitral valvuloplasty in 4 cases. Results: There were 5 early (3.1%) and 4 late (4.4%) deaths. Within 3.6 ± 3.3 years a recurrent gradient greater than 30 mm Hg was found in 42 patients (27%), 20 of whom had 26 reoperations. According to multivariable Cox regression analysis survival was influenced by hypoplastic aortic anulus (P = .01) and mitral stenosis (P = .048); recurrence and reoperation were influenced by coarctation and immediate postoperative left ventricular outflow tract gradients. At a median follow- up of 13.3 years, mean left ventricle-aorta gradient was 20 ± 13 mm Hg. Relief of the subaortic stenosis improved the degree of aortic regurgitation in 86% of patients with preoperative aortic regurgitation. Actuarial survival and freedom from reoperation rates at 15 years were 94% ± 1.3% and 85% ± 6%, respectively. Conclusion: Although surgical treatment provides good results, recurrence and reoperation are significantly influenced by previous coarctation repair and by the quality of initial relief of subaortic stenosis.

Original languageEnglish
Pages (from-to)669-678
Number of pages10
JournalJournal of Thoracic and Cardiovascular Surgery
Issue number4
StatePublished - 1999
Externally publishedYes


Dive into the research topics of 'Surgical treatment of subaortic stenosis: A seventeen-year experience'. Together they form a unique fingerprint.

Cite this