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Canadian Journal of Anesthesia, Vol 6, 267-270, Copyright © 1959 by Canadian Anesthesiologists' Society

Changes in the Electrocardiogram during Induction of Anaesthesia and Endotracheal Intubation

MARVIN J. NOBLE 1 and WILLIAM S. DERRICK M.D.1

1 The University of Texas, M. D. Anderson Hospital and Tumor Institute, Houston, Texas

The stimulation of respiratory epithelium seemingly plays a large role in causing a relative tachyc ardia and, in addition, the role of the premedication drugs and the anaesthetics used is of increasing interest as the source of prendotracheal intubation ECG changes.

Eighty patients were followed through induction of anaesthesia and endotracheal intubation with lead II electrocardiograms. Changes in wave voltage, rate, and rhythm were observed. The heart rate increased in 50 per cent of the patients upon intubation. Approximately 60 per cent of other electrocarliogram changes occurred before laryngoscopy and endotracheal intubation.






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Copyright © 1959 by the Canadian Anesthesiologists' Society.