[Skip to Content]
Access to paid content on this site is currently suspended due to excessive activity being detected from your IP address 54.204.161.30. Please contact the publisher to request reinstatement.
[Skip to Content Landing]
Article
July 1925

THE VALUE OF CLINICAL CARDIODYNAMIC RECORDS

Author Affiliations

SAN FRANCISCO

From the Cardiographic Laboratory, Michael Reese Hospital, Chicago, and Department of Medicine, University of California Medical School.

Arch Intern Med (Chic). 1925;36(1):62-72. doi:10.1001/archinte.1925.00120130065007
Abstract

Methods of functional diagnosis should comply with two requirements: The function to be tested should be precisely known, and quantitative results should be obtained. Neither of these has been exactly fulfilled by the existing methods of functional diagnosis of the heart, first, because the exact nature of the function tested is not given and, second, because the results are not quantitative. In this paper, attention is called to the possibility of elucidating one definite function of the heart by the means of certain graphic methods, phonocardiography and sphygmography. I call these cardiodynamic records. This function, the tonicity, can be considered to depend on the isometric contraction of the myocardium, as expressed in its time element. I will try to bring out some facts in favor of this assumption, after pointing out some well known experimental data on which the hypothesis is based.

THEORETICAL CONSIDERATIONS  Two different forms of contraction occur

First Page Preview View Large
First page PDF preview
First page PDF preview
×