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Kenneth M. Rosen, MD; Henry S. Loeb, MD; Shahbudin H. Rahimtoola, MB, FRCP

Arch Intern Med. 1973;132(4):595-596.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

Mobitz type II block usually occurs in patients with bundle-branch block implying bilateral bundle-branch disease and a poor prognosis.^1-4 The site of block in such cases is distal to the His bundle recording site.⁵ We have recently reported three patients with type II block with narrow QRS complex and a site of block proximal to the His bundle.⁶ The conduction defects in these patients were not progressive, suggesting that type II block proximal to the His bundle was a benign condition.

Simultaneously with the publication of this latter study, we have seen a patient with type II block proximal to the His bundle, a narrow QRS complex, and prolonged periods of asystole. This patient is the subject of the present report.

Patient Summary

The patient was a 65-year-old man admitted to Cook County Hospital on Dec 3, 1971, with a history of syncope. While waiting in the . . . [Full Text PDF of this Article]

Author Affiliations
Chicago

From the Department of Adult Cardiology, Division of Medicine, and the Hektoen Institute for Medical Research of the Cook County Hospital; and the Department of Medicine, Abraham Lincoln School of Medicine, University of Illinois College of Medicine, Chicago.

Footnotes
Received for publication April 5, 1972; accepted July 13.

Reprint requests to Cardiology Section, Abraham Lincoln School of Medicine, Box 6998, Chicago 60680 (Dr. Rosen).

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