In earlier studies5, 6 the simultaneous effect of changes in posture and certain respiratory phases on the electrocardiograms of healthy persons and cardiac patients was reported. Distinct differences in the three standard leads of the electrocardiograms were observed in both groups. These observations have been confirmed.3, 14 These studies have been extended in the present work by including the use of chest leads. In addition, experiments on dogs have been made in order to further interpretation of the results obtained in man.
Electrocardiograms were obtained on 65 healthy persons of both asthenic and pyknic builds and on 116 cardiac
LEIMDORFER A. THE ELECTROCARDIOGRAPHIC RESPONSE TO CHANGES OF POSTURE DURING RESPIRATORY ARREST FOLLOWING DEEP INSPIRATION OR EXPIRATION: CLINICAL SIGNIFICANCE1. Ann Intern Med. 1948;29:1043–1055. doi: 10.7326/0003-4819-29-6-1043
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Published: Ann Intern Med. 1948;29(6):1043-1055.
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