This case report describes the echocardiographic and pathological findings of congenital aortic valve insufficiency in a one-year-old colt.
Documents rare congenital aortic insufficiency in a colt; extends sparse equine case data but leaves open prevalence and outcomes.
Aortic insufficiency was suspected in a thin 1-year-old colt with a grade IV/V decrescendo holodiastolic murmur and a bounding arterial pulse. Echocardiographic findings (diastolic fluttering of the septal leaflet of the mitral valve, left ventricular volume overload, and incomplete aortic valve closure) were diagnostic for aortic valve insufficiency. Moderately thick fibrotic aortic valve leaflets were found at necropsy. Fenestrations were found in the aortic and pulmonic valve cusps. Congenital valvular disease may have led to aortic valvular insufficiency in this horse.
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Clark et al. (1987) studied this question.
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