On the rhythm of the sounds of the heart / by F. C. Donders, M.D. ; translated from the "Nederlandsch Archief voor Genees en Natuurkunde," Utrecht, 1865, by William Daniel Moore, M.D.

  • Franciscus Donders
Date:
[1868]
Catalogue details

Licence: Public Domain Mark

Credit: On the rhythm of the sounds of the heart / by F. C. Donders, M.D. ; translated from the "Nederlandsch Archief voor Genees en Natuurkunde," Utrecht, 1865, by William Daniel Moore, M.D. 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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    pof ions Name and age 061*16S a in percent ages of P 0' in seconds Numbe] Observat A.. idL T i. DO * 4-0-4- 0-382 56 Br. 28 Tr XI. i'± ^ 59 Tort 00 TTT III. nn, 1 1 0*324 98 JVW. TV X V . / 0 0-328 53 Pan. V. 7Q'7 I J i 4.9.^ 0-31 8 31 VI. 81- 44.4 0-329 75 St. 2 VII. 81-5 42-6 0-313 75 vni. 87-7 42-8 0-293 28 L. 22 IX. 89-7 45-1 0-302 29 K. 23 X. 91- 45-6 0-301 61 H. 15 XI. 93-7 41-2 0-309 32 These series lead to the important result that, in the state of rest, is relatively greater the shorter the period. Hence it appears, that in different persons there is less difference in the duration of the active part of the period, than in the period in its integrity. It seemed to us sufficiently important to calculate the absolute duration of the active part of the period, and we see from the above table that, with the considerable difference in frequency of the pulsations from 74-4 to 93*7, the absolute value of o! continues between 0*327 and 0-301. Only in the first series where 63*4 pulsations occurred in the minute, does a increase more con- siderably and indeed to 0-382 second. We had occasion to determine P and «' in a case of very slow pulse, occurring in John Vroomans, shoemaker, aged 57. Six months ago he had a fit, which he described as a sudden shock in the brain; he had fallen and had got a slight wound in the head, which however had been attended with no further serious consequence. The same day he got two slighter attacks, and subsequently also he continued not quite free from similar seizures. At the same time he suffered habitually from pain in the occiput, was asthmatic, and experienced difficulty in going up stairs. On the first examination he had, when sitting, 32 pulsations in the minute. In the subsequent investigations in which the seconds were at the same time registered, I found at first a still lower figure. We have put the results together in the subjoined Table.
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