ISSN : 1301-5680
e-ISSN : 2149-8156
Turkish Journal of Thoracic and Cardiovascular Surgery     
Abidin Cenk Erdal1, Erdem Silistreli1, Hüdai Çatalyürek1, Gökhan Albayrak1, Koray Aykut1, Ünal Açıkel1
1Dokuz Eylül Üniversitesi Tıp Fakültesi, Kalp ve Damar Cerrahisi Ana Bilim Dalı, İzmir
Background: Flow turbulence and left ventricular outflow tract gradient occurring in discrete subaortic stenosis causes valvular distortion after a time period. The aim of this study is to determine timing and results of surgical treatment in subaortic stenosis.

Methods: In the years between July 1996 and April 2003, sixteen cases (nine male seven female) aged between 2-12 years were diagnosed as discrete subaortic stenosis and operated. In these cases subaortic gradient, valvular involvement, operation time and postoperative complications were analyzed.

Results: Sixty-five percent of the cases were symptomatic. In all cases mean gradient was 42 mmHg and aortic clamp time was 34 minutes. In 37% additionally valvular pathologies were diagnosed and in 66% of those valvular plasty were performed to the mitral and aortic valves. In these cases with valvular pathologies mean gradient was 55 mmHg and aortic clamp time was 48 minutes.

Conclusions: In discrete subaortic stenosis flow turbulence causes valvular distortion in long-term period. This study and previous studies suggests that resection of subaortic discrete membrane is a save and effective operation so that regardless of left ventricular outflow tract gradient or symptomatic status operation at the time of diagnosis is a reasonable therapeutic alternative.

Keywords : Subaortic stenosis, subaortic discrete membrane, flow turbulence
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