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The Apex Cardiogram

The Apex Cardiogram Apex cardiography is the recording of movements of the chest wall over the apex of the heart. The subject is placed in a semilateral decubitus, and the left arm is raised. The point of strongest impulse in expiratory apnea is located by the examiner, and a bell or funnel with a diameter of 2.5 to 3.5 cm is held there firmly. If a phonocardiogram is obtained simultaneously, a single cup is used with a small side-extension for attachment of the rubber tubing for the apex cardiogram. Displacements of the chest wall within the area of the rim cause pressure changes in the air in the pickup and tubing; the latter connects to a piezoelectrical crystal, whence voltage changes are amplified and conducted to an oscilloscope and photographic recorder or to a direct-writing instrument. The record shows upward and downward movements corresponding to the impulses at the apex. Vibrations within the http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png JAMA American Medical Association

The Apex Cardiogram

JAMA , Volume 201 (7) – Aug 14, 1967

The Apex Cardiogram

Abstract


Apex cardiography is the recording of movements of the chest wall over the apex of the heart. The subject is placed in a semilateral decubitus, and the left arm is raised. The point of strongest impulse in expiratory apnea is located by the examiner, and a bell or funnel with a diameter of 2.5 to 3.5 cm is held there firmly. If a phonocardiogram is obtained simultaneously, a single cup is used with a small side-extension for attachment of the rubber tubing for the apex cardiogram....
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References (5)

Publisher
American Medical Association
Copyright
Copyright © 1967 American Medical Association. All Rights Reserved. Applicable FARS/DFARS Restrictions Apply to Government Use.
ISSN
0098-7484
eISSN
1538-3598
DOI
10.1001/jama.1967.03130070069023
Publisher site
See Article on Publisher Site

Abstract

Apex cardiography is the recording of movements of the chest wall over the apex of the heart. The subject is placed in a semilateral decubitus, and the left arm is raised. The point of strongest impulse in expiratory apnea is located by the examiner, and a bell or funnel with a diameter of 2.5 to 3.5 cm is held there firmly. If a phonocardiogram is obtained simultaneously, a single cup is used with a small side-extension for attachment of the rubber tubing for the apex cardiogram. Displacements of the chest wall within the area of the rim cause pressure changes in the air in the pickup and tubing; the latter connects to a piezoelectrical crystal, whence voltage changes are amplified and conducted to an oscilloscope and photographic recorder or to a direct-writing instrument. The record shows upward and downward movements corresponding to the impulses at the apex. Vibrations within the

Journal

JAMAAmerican Medical Association

Published: Aug 14, 1967

There are no references for this article.