Ishimitsu T, Hiranuma Y, Sugishita Y, Ito I
Department of Internal Medicine, University of Tsukuba.
J Cardiol Suppl. 1989;21:97-105, discussion 106-8.
This paper reports the findings of phonocardiograms, echocardiogram and Doppler echocardiograms in a case of a 50-year-old man with early mitral valve prolapse with an early systolic murmur. A characteristic early systolic crescendo murmur was recorded at the apex. By amyl nitrite inhalation, the early systolic murmur was attenuated and a late systolic murmur was evoked. On the contrary, methoxamine injection increased the intensity of the early systolic murmur. Early systolic prolapse and early systolic buckling were recorded by two-dimensional and M-mode echocardiography. The phase of mitral regurgitation detected by M-mode color Dopper echocardiography coincided well in timing with the early systolic murmur and the early systolic buckling recorded on the M-mode echocardiogram. A discussion was made on the mechanism of the early systolic mitral regurgitation due to early mitral valve prolapse.
本文报告了一名50岁男性早期二尖瓣脱垂伴收缩期早期杂音患者的心音图、超声心动图和多普勒超声心动图检查结果。在心尖处记录到特征性的收缩期早期渐强杂音。吸入亚硝酸异戊酯后，收缩期早期杂音减弱，并诱发了收缩期晚期杂音。相反，注射甲氧明增加了收缩期早期杂音的强度。二维和M型超声心动图记录到收缩期早期脱垂和收缩期早期弯曲。M型彩色多普勒超声心动图检测到的二尖瓣反流相位与M型超声心动图记录的收缩期早期杂音和收缩期早期弯曲在时间上吻合良好。对早期二尖瓣脱垂所致收缩期早期二尖瓣反流的机制进行了讨论。
