The sphygmograph and the physiology of the circulation : a monograph read before the Medical Society of New Jersey, upon investigations made preparatory to a larger work on the practical value of the sphygmograph / by Edgar Holden.

  • Holden, Edgar, 1838-1909.
Date:
1871
Catalogue details

Licence: Public Domain Mark

Credit: The sphygmograph and the physiology of the circulation : a monograph read before the Medical Society of New Jersey, upon investigations made preparatory to a larger work on the practical value of the sphygmograph / by Edgar Holden. 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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    the pressure of the finger. The stroke is quick, as if indica- tive of some local cardiac irritant; it is wide from increased impulse, and the apex of the first part of the tracing is sharp; the descent considerable, and the reflex wave, both because of suddenly decreased propulsion and greatly increased resist- ance from venous fullness, produces a sharply defined dicro- tism, the line from the second prominence of the tracing itself dropping suddenly. The latter phenomenon would probably be impossible were it not for a dissemination, so to speak, of the blood back through the half emptied larger arteries ; the characteristic curve is therefore as follows, (from a patient): Aortic Regurgitation. Pulmonary Regurgitation. In this form of disease, concerning which Dr. DeCosta re- murks, very little is known from clinical observation, it would be difficult to form a theory since the pulmonary circulation and the right ventricle are chiefly, perhaps solely, involved, and eccentric hypertrophy is constant. The arteries, moreover, that are accessible for tracings are out of the track of the impaired circulation. The condition,