The bearings of chronic disease of the heart upon pregnancy, parturition, and childbed : with papers on puerperal pluero-pneumonia and eclampsia / by Angus MacDonald.

  • Macdonald, Angus, 1836-1886.
Date:
1878
Catalogue details

Licence: Public Domain Mark

Credit: The bearings of chronic disease of the heart upon pregnancy, parturition, and childbed : with papers on puerperal pluero-pneumonia and eclampsia / by Angus MacDonald. Source: Wellcome Collection.

    100/308 (page 88)
    ing, palpitation, and cough, and of pulmonary oedema be- came more and more manifest. Evidence of high tension, on the evening when the labour commenced, is seen in the accompanying tracing, No. 6. No. 6. We tried several working pressures, but obtained the best results with one of 7 ounces. It required the exertion of a strain of 18 ounces on the spring of the sphygmograph to entirely obliterate the radial pulsations. Independently of these considerations, the tracing itself exhibits characters indicative of considerable tension. The up-stroke is quite perpendicular; the tidal or predicrotic wave, though clearly not so well pronounced as it would have been had the pulse not been so quick (the rate is stated in the report to be 96), is nevertheless in several of the parts of the tracing well developed. The special prominence of the dicrotic wave is most probably to be chiefly accounted for by the rapidity of the pulsations. The tracing No. 7, obtained the day after her delivery. No. 7. presents some peculiar characteristics, and therefore I have included it also. The best working pressure in this instance was found to be 5 ounces, and the obliterating pressure 15 ounces. It will be noticed that the up-stroke is of astonish-