PMID: 1199947Dec 1, 1975Paper

Congenital and surgical atrioventricular block within the His bundle

The American Journal of Cardiology
A T NasrallahC E Mullins

Abstract

In three patients with congenital heart disease the site of atrioventricular (A-V) block was localized within the His bundle with the aid of His bundle electrograms. In one patient with first degree A-V block and normal QRS configuration, electrophysiologic studies revealed "split" His potentials. The other two patients had complete A-V block, and their His bundle electrograms revealed His spikes both proximal and distal to the site of block. One of the two patients, who had a pattern of left bundle branch block in the electrocardiogram, had surgically induced complete A-V block after repair of an ostium primum atrial septal defect. The other patient with congenital A-V block had a narrow QRS complex and, in addition to complete block within the His bundle, prolonged A-V nodal conduction time but no associated cardiac anomaly. Both patients with complete heart block required pacemaker insertion. The natural history of intra-H-is bundle block is not known, and it is difficult to recommend appropriate therapy. More electrophysiologic studies are needed in patients with A-V block to determine the prognostic significance of such block or conduction delay in the His bundle.

References

Jan 1, 1975·American Heart Journal·P C GilletteD G McNamara
Jan 1, 1975·Circulation·R M Schuilenburg, D Durrer
May 1, 1972·Progress in Cardiovascular Diseases·A N DamatoS H Lau
Apr 1, 1973·Circulation·J I Haft
Jun 1, 1973·British Heart Journal·P K GuptaK Chadda
Mar 1, 1972·Circulation·R M Schuilenburg, D Durrer
Aug 1, 1972·Circulation·W G Guntheroth
Sep 1, 1972·Circulation·B J ScherlacR H Helfant
Nov 1, 1970·Circulation·K M RosenR M Gunnar
Jan 1, 1970·Journal of Electrocardiology·R A Massumi, N Ali
Jan 1, 1969·Circulation·B J ScherlagA N Damato

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Citations

Apr 1, 1978·Journal of Electrocardiology·N D Berman
Jul 1, 1980·American Heart Journal·P Schweitzer, H Mark
Oct 1, 1976·Circulation·J R JacobsenD G McNamara
May 1, 1979·Circulation·J H McAnultyS H Rahimtoola
Jan 1, 1981·Acta paediatrica Scandinavica·E Esscher

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