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A STUDY WITH THE ELECTROCARDIOGRAPH OF THE MODE OF DEATH OF THE HUMAN HEART.
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MedLine Citation:
PMID:  19867574     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
In four of the seven cases the ventricles remained active from one and a half to eighteen minutes after the electrocardiograms failed to show evidence of auricular activity. In two cases the auricles outlasted the ventricles and in one case only did the auricles and ventricles stop apparently at the same time. Complete dissociation occurred three times. Some delay in the conduction time was seen in five of the seven cases. In two cases the auricles ceased to beat before evidence of impaired conduction appeared. There was always marked slowing; the slowest independent ventricular rates varied from 13.6 to 47.0. The slowest rates at which the auricles beat regularly varied from 20 to 65 per minute. There was never evidence of auricular fibrillation, although in two cases the electrocardiograms give fairly conclusive evidence that ventricular fibrillation occurred. The ventricles re?stablished a regular rhythm after a short period of ventricular fibrillation in one case, while in the other but one ventricular contraction occurred after the appearance of fibrillation. Characteristic changes in the ventricular complex of the electrocardiograms occurred in all the records. They consisted of a gradual fusion of the R- and T-waves, forming, when the fusion was complete, a large rounded or peaked wave. In some cases the identity of the two waves was not entirely lost. In spite of the marked change in shape of the ventricular complexes, there was often but little change in their duration. In some cases the ventricular systole was shortened at the end, while in others it was prolonged. The change in the form of the ventricular electrical complex indicates that the course of the stimulus and the manner of the contraction of the muscle were abnormal. The fact that the R-wave became gradually prolonged suggests that the conduction of the stimulus through the ventricular walls became delayed as the heart died. The fact that after death there is a continuation of cardiac muscular activity sufficient to cause a difference in electrical potential between the two sides of the body does not necessarily mean that a ventricular systole in the sense of muscular shortening takes place. It has been observed experimentally that well defined electrical complexes may be caused by cardiac activity which cannot be seen or recorded graphically. As the duration of the ventricular complexes characteristic of the dying heart usually does not differ markedly from the duration of the complexes before clinical death, it seems probable that the entire musculature of the ventricles participates in the contraction; as definite shortening, or at least a marked change in duration, would be expected if only a part of the ventricular musculature participated in the activity which produced the complex.
Authors:
G C Robinson
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of experimental medicine     Volume:  16     ISSN:  0022-1007     ISO Abbreviation:  J. Exp. Med.     Publication Date:  1912 Sep 
Date Detail:
Created Date:  2010-06-23     Completed Date:  2010-06-23     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2985109R     Medline TA:  J Exp Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  291-302     Citation Subset:  -    
Affiliation:
Hospital of The Rockefeller Institute for Medical Research, New York.
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Full Text
Journal Information
Journal ID (nlm-ta): J Exp Med
ISSN: 0022-1007
ISSN: 1540-9538
Publisher: The Rockefeller University Press
Article Information
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Copyright © Copyright, 1912, by The Rockefeller Institute for Medical Research New York
Received Day: 23 Month: 5 Year: 1912
Print publication date: Day: 1 Month: 9 Year: 1912
Volume: 16 Issue: 3
First Page: 291 Last Page: 302
ID: 2124962
PubMed Id: 19867574

A STUDY WITH THE ELECTROCARDIOGRAPH OF THE MODE OF DEATH OF THE HUMAN HEART
G. Canby Robinson
From the Hospital of The Rockefeller Institute for Medical Research, New York.


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