Subvalvular membranous aortic stenosis: Results of surgical therapy

Subvalvular membranous aortic stenosis. Results of surgical therapy.

Surgical relief of diffuse subvalvular aortic stenosis.

CONGENITAL valvular aortic stenosis and congenital localized subvalvular aortic stenosis are commonly encountered, easily recognized at operation, and relieved by standard surgical technics. Idiopathic diffuse subvalvular aortic stenosis is uncommon and can be overlooked at operation. Its relief by indirect methods has been proposed by some because of the problems inherent in its exposure in di...

Subvalvular Aortic Stenosis.

Subvalvular aortic stenosis (SAS) is a congenital heart defect that causes fixed form of hemodynamically significant left ventricular outflow tract (LVOT) obstruction with progressive course. It has a spectrum of anatomy. It appears usually beyond infancy, causes left ventricular hypertrophy and myocardial dysfunction, and tends to involve the aortic and mitral valves in its progressive course....

Results of Surgical Treatment of Patients with Diffuse Subvalvular Aortic Stenosis.

The age and sex of the patients and their presenting symptoms are shown in table 1. Two of the patients, cases 3 and 6, had a family history suggesting that the disease was familial. A murmur had been present before the age of 5 years in case 6, while the remainder of the patients had become aware of the presence of a heart murmur after age 12. Symptoms were moderate to severe in all patients e...

Fluid dynamics of aortic stenosis: subvalvular gradients without subvalvular obstruction.

Analysis of a tapering, pulsatile flow field predicts that substantial subvalvular pressure gradients exist in patients with valvular aortic stenosis (AS) without invoking a second anatomic site of obstruction. Using a catheter with two laterally mounted micromanometers, we examined the left ventricle in 11 patients with AS, mean age 64 +/- 11 years (+/- SD); the mean valve area was 1.0 +/- 0.3...