 | 1838 - 500 páginas
...muscular fibres of the ventricles when they contract ; and that the second sound essentially depends on the reaction of the arterial columns of blood on the semilunar valves of the arterial orifices, at the moment of the ventricular diastole. Certain other circumstances were... | |
 | 1837 - 494 páginas
...muscular fibres of the ventricles when they contract ; and that the second sound essentially depends on the reaction of the arterial columns of blood on the semilunar valves of the arterial orifices, at the moment of the ventricular diastole. Certain other circumstances were... | |
 | British Association for the Advancement of Science - 1838 - 822 páginas
...tightening of the muscular fibres of the ventricles when they contract ; and that the second soimd, which accompanies the diastole of the ventricles,...posture, of increased action of the heart, and of certain stages of the respiratory movements. It is also obvious that the character of the first sound... | |
 | British Association for the Advancement of Science - 1838 - 824 páginas
...of the ventricles, depends solely on the reaction of the arterial columns of blood on the scmilunar valves at the arterial orifices. It further appears...posture, of increased action of the heart, and of certain stages of the respiratory movements. It is also obvious that the character of the first sound... | |
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... be considered as fairly established, that the first or systolic sound of the heart is essentially caused by the sudden and forcible tightening of the muscular fibres of the ventricles when they contract ; and that the second sound, which accompanies... 