Heart-beat and pulse-wave / by C.S. Roy and J.G. Adami.

  • Roy, Charles Smart, 1854-1897.
Date:
1890
Catalogue details

Licence: Public Domain Mark

Credit: Heart-beat and pulse-wave / by C.S. Roy and J.G. Adami. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    00 CO 4^ d ^ o 55- o to o 3 TRACTS 224(13) /.<^ii:uI.-mai,:tB. c E Q. IE 1/5 J/ A,'. 1 7v: Z'-ii A\4 7' A NI) P ULSE- WA VE. 41 5 detail either the methods used or the results obtained in such experiments. As we have pointed out, there is on the intraventricular pressure-curve, and during that part of it which corresponds to the time when the aortic valve is open, a superposed wave Fig. 25. A, normal pulse from radial of healthy adult male, obtained by sphygmometer. Extra-arturial pressure of 70 mm. of mercury. 1 to 2, up-stroke ; 2, apex of papillary wave ; 3, notch between papillary and outflow-remainder waves (predicrotio notch); 3 to 4, outflow-remainder wave ; 4, dicrotic notch ; 4 to 6, post-dicrotic wave ; 6, post-dicrotic notch. [Note.—The small notches on the first and second of the superposed waves of tho first of these pulse-curves have crept in by mistake in the engi-aving, and are not present in the original curve.] B, from same artery with same extra-arterial pressure, taken during acute catarrh of upper respiratory passages. due to the sudden pulling down of the auriculo-ventriculai valves by the papillary muscles, during the first rapid part o' their contraction. It is easy to prove that this superpcpr