File:A manual of human physiology, including histology and microscopical anatomy, with special reference to the requirements of practical medicine (1885) (14781041252).jpg

Identifier: manualofhumanphy01land (find matches)
Title: A manual of human physiology, including histology and microscopical anatomy, with special reference to the requirements of practical medicine
Year: 1885 (1880s)
Authors: Landois, L. (Leonard), 1837-1902 Stirling, William, 1851-1932
Subjects: Physiology Histology
Publisher: Philadelphia, P. Blakiston, Son, and Company
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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towards 2 p.m. ; towards 3 (at dinner-time) anotherincrease takes place and goes on until 6 to 8 p.m., =70; and it falls until mid-night =54. It then rises again towards 2 a.m., when it soon falls again, andafterwards rises as before towards 3 to 6 a.m. Pulse-Rate. Temp. F. Pulse-Rate. 60 103° . 110 70 104° . 120 80 105° . 130 90 106° . 140 100 4. Variations in the Pulse-Rhythm. On applying the fingers to the normal pulse we feel beat after beat occurringat apparently equal intervals. Sometimes in a normal series a beat is omitted«= pulsus intermittens, or intermittent pulse; at other times the beats become VARIATIONS IN THE STRENGTH,TENSION,AND VOLUME OF THE PULSE. 143 smaller and smaller, and after a certain time begin as large as before = P. myurus.When an extra beat is intercalated in a normal series = P. intercurrens. Theregular alternation of a high and a low beat = P. alternans (Traube). In theP. bigeminus of Traube the beats occur in pairs, so that there is a longer pause
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Fig. 60.Pulsus alternans. after every two beats. Traube found that lie could produce this form of pulse incurarised dogs by stopping the artificial respiration for a long time. The P. frige-minus and quadrigcminus occur in the same way, but the irregularities occur afterevery third and fourth beat. Knoll found that in animals such irregularities ofthe pulse were apt to occur, as well as great irregularity in the rhythm generally,when there is great resistance to the circulation, and consequently the heart has greatdemands upon its energy. The same occurs in man, when an improper relationexists between the force of the cardiac muscle and the work it has to do (Riegel).Complete irregularity of the hearts action is called arhythmia corclis. 71. Variations in the Strength, Tension, andVolume of the Pulse. The relative strength of the pulse (p. fortis and debilis), i.e., whether the pulseis strong or ivealc, is estimated by the weight which the pulse is able to raise. Asphygmograph, provid

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