Physiology and biochemistry in modern medicine . Fig. 38.—Electrophonograms along with intraventricular pressure curves from three dif-ferent experiments. In A the uppermost curve shows the pressure, the middle one the soundsof the right ventricle, and the lowermost one those of the aorta. P indicates the relative posi-tion of the curves. M is due to mechanical oscillations. S2 indicates the second sound, and/, z, 3, and 4 the corrected time relations of the first sounds. In B, the pressure and soundcurves are both from the left ventricle (letters same as in A). In C, the aortic and pulmonarya
Physiology and biochemistry in modern medicine . Fig. 38.—Electrophonograms along with intraventricular pressure curves from three dif-ferent experiments. In A the uppermost curve shows the pressure, the middle one the soundsof the right ventricle, and the lowermost one those of the aorta. P indicates the relative posi-tion of the curves. M is due to mechanical oscillations. S2 indicates the second sound, and/, z, 3, and 4 the corrected time relations of the first sounds. In B, the pressure and soundcurves are both from the left ventricle (letters same as in A). In C, the aortic and pulmonaryarterial sounds are shown (letters same as in A). (From Wiggers and Dean.) duration of the sound is from to seconds, and the periodicityfrom to per second. When compared with an intraventricu- 160 THE CIRCULATION OF THE BLOOD lar pressure curve, the initial vibrations occur second prior to the risein pressure, the main vibrations reaching their greatest amplitude beforethe sphygmic period begins, and the final vibra
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Keywords: ., bookcentury1900, bookdecade1910, bookpubli, booksubjectphysiology
