Physiological observations on the pulsations of the heart, and on its diurnal revolution and excitability / by Dr. Knox.

  • Knox, Robert, 1791-1862.
Date:
[1837?]
Catalogue details

Licence: Public Domain Mark

Credit: Physiological observations on the pulsations of the heart, and on its diurnal revolution and excitability / by Dr. Knox. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    Hem ARKS.—During these observations the meals were, Breakfast, (coffee) a.m. Dinner, . &\ p. m. Coffee, . . 8| P. m. Neither wine, spirits, nor malt liquors were used. To determine the effects of exercise on the pulse T made the following observations. Table XIII. Showing the rate of sinking of the pulse after walking a mile in a quarter of an hour, counted after intervals of five minutes. After 1st 5 minutes, 2(1 do. 3(1 do. 4th do. 5th do. Gth do. 7th do. 105 93 90 88 88 88 88 Table.—Rate of sinking of the pulse, counted at intervals of five minutes, after walking four miles in one hour. 90 85 70 80 75 77 75 Table XIV. Shewing the rate of sinking of the pulse at intervals of five mi- nutes, after walking one mile in ten minutes. After 1st 5 minutes. 2d do. 3d do. 4th do. 5th do. 6th do. 7th do. 8th do. 124 110 100 100 98 97 90 90 These observations were made for me by a young gentleman, (Mr S.) muscular, and seemingly quite healthy. Exercise quickens the pulse more in the young than in the aged. Walking at the same rate with a young friend of half my age, I found our pulses to be in the following ratio. Table XV. Age. Pulse. Pulse. Pulse. Pulse. R. K. 42 92 94 104 77 H. K. 19 113 130 130 94 The pulsations were counted at intervals, during a walk of twenty miles, at four miles an hour. Both stood whilst the pulse was reckoned. Towards 5 p. M. I felt more fatigued than he did, and my pulse shewed, by an increased elevation, the effects of debility : R. K. 110; H. R. 117. When the pulse quickens unnaturally on exercise it is a sign of debility. The following table contains the result of a series of observa- tions made during the course of a day, in which, though only twenty-two miles were walked, the fatigue felt towards the close of the day was very considerable. The table shows, 1st, The effects of exercise when well, and when debilitated by over fatigue. 2d, The rate of sinking of the pulse during the day. 3d, The gi'eat rapidity of the pulse occasioned by debility. It proves that exercise should constantly stop on this side fa-