. Diseases of the heart and thoracic aorta. Fig. 42.—Diagrammatic representation of a diastolic murmur, replacing secondsound. 2= Fig. 43.—Diagrammatic representation of a diastolic murmur, replacing secondsound, and extending into long pause. 2=murmiir; B=long pause. Now, since the second sound of the heart is due to theclosure and tension of the aortic and pulmonary valve flapsit follows, that a murmur which replaces the second soundmust represent regurgitation through the aortic or pulmonary-valvular orifices. And since, as a matter of practical expe-rience, we know that pulmonary r
. Diseases of the heart and thoracic aorta. Fig. 42.—Diagrammatic representation of a diastolic murmur, replacing secondsound. 2= Fig. 43.—Diagrammatic representation of a diastolic murmur, replacing secondsound, and extending into long pause. 2=murmiir; B=long pause. Now, since the second sound of the heart is due to theclosure and tension of the aortic and pulmonary valve flapsit follows, that a murmur which replaces the second soundmust represent regurgitation through the aortic or pulmonary-valvular orifices. And since, as a matter of practical expe-rience, we know that pulmonary regurgitation hardly everoccurs, a diastoHc murmur, which replaces the second soundat the base, is, for practical purposes, pathognomonic-^ of aorticregurgitation. Further, we know, as a matter of practicalexperience, that this murmur is almost invariably regurgitation generally results from organic changesin the aortic segments (contractions, puckerings, adhesions,ruptures, ulcerations), though it is occasionally due to dilata-tion of the base of the aorta, the valve segments being In one or two cases a diastolic m
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectheart, bookyear1884
