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Circulation Research. 1962;10:280-284

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(Circulation Research. 1962;10:280.)
© 1962 American Heart Association, Inc.

Cardiodynamic Effects of Experimental Bundle-Branch Block in the Dog

JAMES R. WENNEMARK M.D.1, DAVID F. BLAKE M.D., PAUL KEZDI M.D.2

1 Department of Medicine, Northwestern University Medical School Chicago, Illinois
2 Department of Medicine, Northwestern University Medical School Chieago, Illinois

Electrical-mechanical relationships of the canine heart were studied using simultaneous right and left intraveutricular pressures. In the control tracings, there was usually some asynchrony in the onset of ventricular isometric contraction with the right ventricle following the left ventricle. Right bundle-branch block and left bundle-branch block produced a delay in the onset of isometric contraction of the homolateral ventricle. A change in contour of the right intraventricular curve was frequently seen with right, bundle-branch block.

Submitted on August 21, 1961






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