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The Murmur of Dynamic Subortic Stenosis Recognition Through A Novel Graphic Display

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DOI: 10.4236/ijcm.2012.35078    3,069 Downloads   4,314 Views  
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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 (< 2 m/sec) this pattern was produced regularly by the Valsalva maneuver. Conclusions: Dynamic subaortic stenosis produces a specific sound spectral pattern that may provide a basis for clinical evaluation, especially in early detection of this disorder and in screening situations.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

M. Tavel, "The Murmur of Dynamic Subortic Stenosis Recognition Through A Novel Graphic Display," International Journal of Clinical Medicine, Vol. 3 No. 5, 2012, pp. 419-425. doi: 10.4236/ijcm.2012.35078.

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