subvalvular aortic stenosis
types:
- anatomic/fixed subaortic stenosis:
- associated with cardiac defects in 50% (usually VSD)
- functional/dynamic subartic stenosis:
- asymetrical septal hypertrophy (ASH)
- idiopathic hypertrophic subaortic stenosis (IHSS)
- hypertrophic obstructive cardiomyopathy (HOCM)
findings:
- asymmetrically thicker ventricular septum than free wall of
the left ventricle (95%)
- normal/small left + right ventricular cavities (95%)
- systolic anterior motion of the mitral valve
- lucent subaortic filling defect in systole
- coarse systolic flutter of valve cusps
- may see mitral regurgitation (secondary to abnormal position
of anterolateral pappilary muscle)
see: aortic stenosis
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© 2002, C.E. Kahn, Jr.
2002-04-18