. Diseases of the heart and arterial system; Designed to be a practical presentation of the subject for the use of students and practitioners of medicine. Fig. 120.—-From a Womaw, Aged Forty-four, During an Attack of ParoxysmalTachycardia. Pulse, 196 per Minute. Between the extreme frequency of the pulse in paroxysmaltachycardia and the remarkable slowness of bradycardia lies awide gap which is filled by the rapid pulses of infectious fevers,the varying pulses of health and the slow pulses of age, some ofthe intoxications, etc. (Figs. 120 and 121). Fig. 121.—From a Man, Aged Twenty-eight, -wit
. Diseases of the heart and arterial system; Designed to be a practical presentation of the subject for the use of students and practitioners of medicine. Fig. 120.—-From a Womaw, Aged Forty-four, During an Attack of ParoxysmalTachycardia. Pulse, 196 per Minute. Between the extreme frequency of the pulse in paroxysmaltachycardia and the remarkable slowness of bradycardia lies awide gap which is filled by the rapid pulses of infectious fevers,the varying pulses of health and the slow pulses of age, some ofthe intoxications, etc. (Figs. 120 and 121). Fig. 121.—From a Man, Aged Twenty-eight, -with Eecuerent Bradycardia. Pulse, 25 per Minute. The sustained arterial tension as shown in the pulse varieswithin wide limits. The lowest tension is found in some of theacute infections—e. g., general gonorrhoeal or pneumococcal, inwhich there occurs, very early, profound capillary paresis. Inmany of these cases the powerful left ventricle throws the blood 820 DISEASES OP THE HEART forcibly into the arteries and tlirouiili the capillaries with prac-tically no resistance, as shown in the following tracing (Fig. 122).. Fig. 12i!.—Fkum a Man, AbEu Tweniy-five, with Acute Genekal Gonouuhceal Infection. In some of these cases the capillary and arteriole vaso-motorreflexes respond energetically to an nnnatnral stinmlns, and thedicrotic pnlse of every grade is the result, an example of which is
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