The direct influence of gradual variations of temperature upon the rate of beat of the dog's heart / by H. Newell Martin.

  • H. Newell Martin
Date:
1883
Catalogue details

Licence: Public Domain Mark

Credit: The direct influence of gradual variations of temperature upon the rate of beat of the dog's heart / by H. Newell Martin. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    Experiment TV. May 10, 1882.—-Dog weighed 10,300 grms. Narcotised by subcutaneous injection of acetate of morphia before commencing the operation of isolating the heart. Venous pressure that due to a column of defibrinated Calf's blood 15 centims. in height. Heart isolated at 12'' 25' P.M. Number of Time P.M. Carotid pressxire Temperature Pulse-rate observation. in millims. of Hg. in aortic aruh. per minute. ] h. 12 m. 45 118 34-l(?) 1.58 It seems almost certain that the 2 12 47 117 34-5 151 reading of the thermometer 3 12 49 116 35-1 157 in observation 1 was a degree 4 12 51 116 35-5 156 out, and should be 35-1°. 5 12 53 116 37-1 183 6 12 54 116 39'0 195 7 12 55 116 38-0 180 8 12 56 116 38-3 181-5 9 12 68 116 38-5 184'5 10 12 59 116 38-5 183-0 11 00 116 38-0 172-5 12 02 112 37-5 166-5 13 03 113 36-5 157-5 14 05 112 35-0 137-0 15 06 114 34-0 127-5 16 08 114 33-5 126-0 17 09 112 33-5 126-0 18 11 111 32-7 114 19 13 110 31-9 108 20 14 111 31-5 102 21 15 113 31-0 99 22 17 113 30-5 92 23 20 112 31-5 110 24 22 112 32-5 119 25 24 110 33-9 1.33-5 26 27 110 34-0 129 Lungs pricked since last observa- 27 30 113 34-5 139-5 tion. 28 32 114 35-0 140 29 34 114 35-5 148 30 37 (?) 36-5 179 Pericardium cut away since last 31 38 101 38-0 192 observatiou. 32 39 105 39-0 198 33 40 107 39-6 199 34 42 108 39'0 189 After this the heart suddenly ceased to pump round, and its right auricle was seen to be paralysed. The lungs were extremely oedematous. The chart on Plate 49 represents graphically the results of the preceding experiment.