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June 10, 1933

CONGENITAL HEART BLOCKREVIEW AND REPORT OF THE SECOND CASE OF COMPLETE HEART BLOCK STUDIED BY SERIAL SECTIONS THROUGH THE CONDUCTION SYSTEM

Author Affiliations

Major, M. C., U. S. Army WASHINGTON, D. C.
From the Georgetown University School of Medicine.

JAMA. 1933;100(23):1831-1837. doi:10.1001/jama.1933.02740230009001
Abstract

In 1929, one of us1 reviewed the literature on congenital heart block and reported the first case of complete heart block of congenital origin studied by serial sections through the conduction system. One other case of congenital heart block in which there was partial (2:1) block had been studied in this manner by Wilson and Grant.2 The case to be reported is the second case of congenital, complete heart block studied histopathologically.

Congenital heart block is not common. In the review1 in 1929, thirty cases were accepted from the literature as fulfilling certain diagnostic criteria. Many other cases were excluded because of insufficient proof either of their congenital origin or of the existence of heart block. The criteria of acceptance in certain instances may have been too rigorously applied. For instance, Calandre's3 case was excluded because there was a possibility that the block was due to

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