Parachute mitral valve can present with echocardiographic features identical to idiopathic hypertrophic subaortic stenosis, which should be considered in the differential diagnosis for young patients.
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Parachute mitral valve may mimic IHSS on echo in young patients; case report leaves differential open for validation.
The echocardiographic features recorded in a patient with a congenital anomaly, single papillary muscle (parachute mitral valve), were identical with those seen in patients with idiopathic hypertrophic subaortic stenosis (IHSS). Asymmetric septal hypertrophy, mitral valve systolic anterior movement, aortic valve vibration, and midsystolic reclosure were all demonstrated. This congenital anomaly, should, therefore, be considered in any young patient before making the diagnosis of IHSS from the echocardiogram.
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Boughner et al. (1976) studied this question.
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