File:American journal of physiology (1898) (14779169701).jpg

Identifier: americanjourn01ameruoft (find matches)
Title: American journal of physiology
Year: 1898 (1890s)
Authors: American Physiological Society (1887- ) American Physiological Society (1887- ). Abstracts of papers presented at the fall meeting American Physiological Society (1887- ). Proceedings
Subjects: Physiology Physiology
Publisher: (Bethesda, Md., etc.) American Physiological Society (etc.)
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

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s which were sustained by a coronary circulation of about 3.3 c.c.per minute, and report a case of fair contractions observed under acirculation of less than 2 c.c. per minute; the customary volume ^ Hyde (I. H.) : Proceedings of the American Physiological Society, Science,Jan. 22, 1897. The paper will be published in full in this Journal, 1898, vol. i. - Modified for mammalian tissues: NaCl, 0.9%; CaCU, 0.02%; KCl, o.o\cf^-water distilled In glass. The formula was kindly furnished by Mr. F. S. Locke. Endocardiac Nutrition of the Heart. 97 employed ranged from 3.5 c.c. to 13 c.c. per minute. My own resultsserve to emphasize this fact still further. In supplying the heart withblood through the vessels of Thebesius the circulation was at all timesvery small — in many cases, even, hardly measurable. In the ex-periment of April I, there can have been scarcely more than a mereoozing of blood in and out between the coronary veins and theventricular cavity through the vessels of Thebesius.
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Figure 3. From a cats heart fed from the interior of the right ventricle, April i, 1897.Recorded one hour after removal of the heart from the body. The upper curve wasdrawn by means of a Marey tambour connected with the cannula in the right ven-tricle. The lower curve gives the time in seconds. The discussion of the nutrition of the heart through the vessels ofThebesius leads now to the consideration of a somewhat strikinganalogy. It is known that the heart of the frog receives almost itsentire nutriment through the branching passages that carry the bloodfrom the interior of the heart nearly to the pericardial surface. Myexperiments have shown that the heart of the cat may be nourishedin much the same way; there is, indeed, a marked resemblance inboth method and results between my experiments and many whichhave heretofore been performed on the heart of the frog. The sim-plicity of this method of nutrition, as well as its value in bringing themammalian and batrachian hearts in a physio

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