A treatise on the diseases of the heart and great vessels : comprising the author's view of the physiology of the heart's action, as demonstrated by his experiments in 1830 : and an appendix of his experiments in 1834-5 on the sounds : which have since been repeated by a committee of the British Association / by J. Hope.

  • Hope, James, 1801-1841.
Date:
1835
Catalogue details

Licence: Public Domain Mark

Credit: A treatise on the diseases of the heart and great vessels : comprising the author's view of the physiology of the heart's action, as demonstrated by his experiments in 1830 : and an appendix of his experiments in 1834-5 on the sounds : which have since been repeated by a committee of the British Association / by J. Hope. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

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    ]() CHAPTER II. ON THE ACTION OF THE HEART SECTION I. EXPERIMENTAL RESEARCHES ON THE ACTION OF THE HEART. Sounds of the Heart, 10. Error of M. Laennec, 11. Ex- periments on the Rabbit, 13, on the Frog, 14, on the Ass, 15. First Series, 21. Second Series, 30. When the ear or a stethoscope is applied to the precordial region, two successive sounds, followed by an interval of silence or repose, are distinctly heard. The former, which is synchronous with the impulse, and, in vessels near the heart, with the pulse, is duller and slower, terminating without an appreciable interval in the latter, which is louder and smarter, like the flapping of a bellows' valve. These sounds, first noticed by Laennec, were attri- buted by him the one to the ventricular, the other to the auricular contraction, and this doctrine re- mained unquestioned for a period of eight or ten years, until Mr. Turner, supported by the authority of the old physiologists, Haller, Harvey, Lancisi,