TITLE:
The Murmur of Dynamic Subortic Stenosis Recognition Through A Novel Graphic Display
AUTHORS:
Morton E. Tavel
KEYWORDS:
Hypertrophic Cardiomyopathy; Cardiac Physical Diagnosis; Subaortic Stenosis; Heart Murmurs; Computer Analysis of Heart Sounds
JOURNAL NAME:
International Journal of Clinical Medicine,
Vol.3 No.5,
September
24,
2012
ABSTRACT: Background: Dynamic subaortic stenosis occurs in differing situations, commonly with hypertrophic cardiomyopathy. Regardless of the underlying cause, the resulting murmurs usually possess a characteristic sound spectral pattern, manifesting a sharp and high frequency peak occurring late in systole, often bearing a striking resemblance to the subaortic Doppler flow pattern. Methods: Murmurs found in thirty one subjects with dynamic subaortic stenosis were analyzed after having been recorded with a novel portable device capable of spectral and waveform sound displays. Results: All subjects manifested characteristic frequency patterns, consisting of high and sharp peaks occurring in late systole. With significant subaortic stenosis (resting subaortic flow velocity > 2 m/sec) this pattern was evident at rest. In the presence of little or no resting subaortic obstruction (