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1 Department of Medicine, Indiana University School of Medicine and the Krannert Institute of Cardiology, Marion County General Hospital, Indianapolis
The occurrence of systolic ejection sounds (SS) in idiopathic hypertrophic subaortic stenosis (IHSS) has been controversial. We examined the graphic studies of 42 patients with proved IHSS. Eight were felt to have early systolic "click-like" sounds. These sounds occurred only at times of significant hemodynamic subaortic obstruction and, in contrast to other ejection sounds, occurred at the time of the first peak of the carotid pulse. We conclude that early systolic sounds occasionally are present in IHSS, but their origin and nature are not similar to ejection sounds in other diseases.
Submitted on February 27, 1974
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