Electrocardiogram of the Diving Seal

Author:

MURDAUGH HERSCHEL V.1,SEABURY JAMES C.1,MITCHELL WILLIAM L.1

Affiliation:

1. Mount Desert Island Biological Laboratory and the Departments of Medicine, University of Alabama and Duke University Schools of Medicine

Abstract

During the normal dive, the seal has a reflex bradycardia that is not accompanied by inversion of P waves or T waves or by atrial or ventricular arrhythmias, although the seal does have an occasional block of conduction across the A-V node during normal diving. The reflex bradycardia during the dive appears to be mediated through vagal stimulus. The electrocardiograms of the seal during voluntary diving and during forced submersion with struggle are different.

Publisher

Ovid Technologies (Wolters Kluwer Health)

Subject

Cardiology and Cardiovascular Medicine,Physiology

Reference16 articles.

1. IRVING , L. , SCHOLANDEB , P . F. , AND GBOJNELL, 8. W.: Regulation of arterial blood pressure in the seal during diving. Am. J. Physiol. 135 : 557 , 1942 .

2. Respiratory metabolism of the seal and its adjustment to divine-J;IBVING I/.;Cell. & Comp. Physiol.

3. SCHOLANDEE P . F . : Experimental investigations on the respiratory function in diving mammals and birds. Hvalraadets Skrifter no. 22. Det Norske Videnskaps Akademi i Oslo 1940 pp. 1-131.

4. BEET P . : Lecons sur le Physiologic Compares de la Respiration. Paris J . B. Bailliere et fils 1870.

5. THE DIVING HABITS OF THE BEAVER LAURENCE IRVING

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