. The clinical study of blood-pressure : a guide to the use of the sphygmomanometer in medical, surgical, and obstetrical practice, with a summary of the experimental and clinical facts relating to the blood-pressure in health and in disease . te, the effect of exertionon mean aortic pressure. Here, as elsewhere, the determination of bothpressures would be most valuable in throwing light on the actual vascularchanges. The indications afforded by the increased pulse-volume, in thepresent instance, point clearly to increased energy of the heart as at leastone factor in the rise of pressure, if n
. The clinical study of blood-pressure : a guide to the use of the sphygmomanometer in medical, surgical, and obstetrical practice, with a summary of the experimental and clinical facts relating to the blood-pressure in health and in disease . te, the effect of exertionon mean aortic pressure. Here, as elsewhere, the determination of bothpressures would be most valuable in throwing light on the actual vascularchanges. The indications afforded by the increased pulse-volume, in thepresent instance, point clearly to increased energy of the heart as at leastone factor in the rise of pressure, if not the only one. Under conditions VARIATIONS IN THE SAME INDIVIDUAL 123 of too excessive work in proportion to the individuals cardiac power, theblood-pressure, after its primary rise, may show a gradual fall, evenbelow the normal. With this there are dyspnoea and other subjectivesymptoms, and, according to Schott, and Larrabee, acute dilatation of theheart. Here we border on the pathological effects seen in diseased hearts,which will be considered later. Masing has found similar results frommoderate exertion in the aged, the primary rise of pressure being main-tained for only a short time. In these older men there was also less accel-. FiG. -Influencb of muscular exertion on blood-pressure in the aged.(Eiva-Eoccis sphygm., 5 em.) Chart obtained from a man of sixty-eight, with the same work as the subject ofFig. 39. During the worlc the pulse became quite irregular at times; after seventeenminutes, dyspnoea. At the close of the work, dyspnoea, palpitation, great fatigue ofthe legs. Note the great rise in blood-pressure as compared with pulse-rate; its fall during thework; the more gradual return to normal at its close. (From Masing, loe. cit., p. 286.) eration of the heart than in the young. Here again is strong evidencethat the rise during physical work is due to increased cardiac energy. Karrenstein has just published observations on 74 soldiers under-going rather protra
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbloodpr, bookyear1904
