Q-第1心音時間(変形期),とくに,その診断的意味について
スポンサーリンク
概要
- 論文の詳細を見る
The length of QI time duration and the amplitude of the first cardiac tone were measured in 3 cases with coronary sclerosis, and each one with mitral stenosis, with mitral stenoinsufficiency, and with mitral stenoinsufficiency complicated by aortic regurgitation who were all suffered from auricular fibrillation, with special reference to their relation to the hemodynamical values. In 1952, Holldack has pointed out the prolongation of QI time duration in auricular fibrillation, however he has not discussed the influence of underlying disorders, decompensation and respiration upon QI time duration. Under such special considerations, the phonocardiography was performed by means of crystal microphone with the cycle-characteristics, equal to stethoscopic microphone (Luisada) and of amplyfyer with the characteristics slightly descendant from 30 to 1000 c. Besides carotid pulse wave, ecg., respiratory curve and cardiogram were simultaneously recorded. For the measurement of the amplitude, exspiratory and inspiratory phases were devided roughly into the maximal amplitude (peak amplitude) of the first tone and the initial amplitude of the second part were estimated; these data were voluntarily expressed at 20 mmHg, For the purpose of the cardio-vascular dynamical analysis, Blumberger-Holldack's and Wezler's newly improved methods were used. 1. In proportion to the increase in the preceding cardiac cycle length, QI time duration tended roughly to decrease, or to remain unchanged. The length of the preceding cardiac cycle length showed almost constant relationship to QI time duration against QII. The most part of the mean QI time duration in auricular, fibrillation was formed longer than that in normal health. The recompensation tended to show the normalization of prolonged QI time duration. However the QI time duration in one case with compensated pure mitral stenosis remained within the normal limits. 2. As the prolongation of the preceding cycle length, it appeared not seldom to be likely to assure the existence of the definite relationship between peak amplitude and amplitude of the second phase of the first tone. But this tendency could not necessarily be applied to all of cases. 3. The case with mitral stenosis as above mentioned showed, in the gradual mode, both decrease in amplitude of the second phase and increase in peak amplitude of the first tone as the prolongation of the cardiac cycle length. But such a tendency could not be recognized when mitral insufficiency or aortic regurgitation was complicated. From the mention above, it must be cautiously interpreted the diagnostic meaninig as to both QI time duration and the changes in amplitude, because the events are never simple; this was insisted repeatedly by the quotation of the text examples.
- 千葉大学の論文
著者
関連論文
- 小児喘息発作即時改善の経験
- 21.Closing Volume Curve 3相における波動について(第601回千葉医学会例会・第13回肺癌研究施設例会)
- Q-第1心音時間(変形期),とくに,その診断的意味について