樂音様雜音の臨床的研究
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概要
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Musical murmur is very impressive on auscultation, and is compared with “cooing of a dove”. Its wave recorded on phonocardiogram, shows regular form as sine wave. This murmur is heared rarely and its typical wave is showed in syphilitic aortic regurgitation. Of all 1, 178 cases recorded by our multi-channel phonocardiography, musical murmur and sound were found in 28 cases. In 12 of those 28 cases, the murmur and sound were diastolic and organic origin. Most of organic murmur and sound were seen in aortic regurgitation. Systolic murmur was seen in 16 cases, of which 8 were functional in origin. Frequency of this murmur and sound is 128 c/s in average, intensity ratio is very high, its duration is 0.11 sec. in murmur and 0.068 sec. in sound. Musical murmur or sound seems to be caused by co-vibration of abnormal valve leaflet or other loose tissue in blood flow. In functional musical murmur, there is no clinical significance. In organic musical murmur, when heart failure continues for extended time, the prognosis is worse and the prognosis of organic musical sound is also worse.
- 社団法人 日本内科学会の論文