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(Circulation. 1960;22:896.)
© 1960 American Heart Association, Inc.

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Observations on the Occurrence of Right Bundle-Branch Block Following Open Repair of Ventricular Septal Defects

J. DAVID BRISTOW M.D.¹; DONALD G. KASSEBAUM M.D.¹; ALBERT STARR M.D.¹; HERBERT E. GRISWOLD M.D.¹

¹ From the Division of Cardiology, Department of Medicine, the Division of Thoracic Surgery, Department of Surgery, and the Crippled Children's Division, University of Oregon Medical School, Portland, Ore.

The occurrence of right bundle-branch block and varying degrees of altered ventricular conduction in a group of cases of ventricular septal defects repaired by direct closure is presented.

The development of abnormal conduction is correlated with the location of the ventricular septal defects and the relationship of the conduction tissue.

The etiologic role of operative trauma to the conduction system is reviewed, and the influence of ventriculotomy alone is discounted.