Electrophysiologic and pathologic correlations in six cases of atrioventricular block

Abstract

1)Aprolonged A-H interval suggested A-V nodal involvement. 2)A prolonged duration of the His potential suggested moderate His bundle involvement. 3)Complete block distal to H appeared to reflect total disruption of both bundle branches. 4)The lesion at the penetrating portion of the His bundle could be responsible for A-H block. 5)A-H block occurred in a case of cellular infiltration in the A-V node and the His bundle, in which bilateral bundle branch showed severe fibrosis. 6)A combination of right bundle branch block, marked left axis deviation and H-V prolongation suggested trifascicular disease.7)In case 6, there was a severe pathologic lesion at the origin of the left bundle branch, yet left bundle branch block was not indicated electro-cardiographically. This study revealed a close correlation between electrophysiologic and pathologic findings in 4 out of 6 cases. © 1980, The Japanese Circulation Society. All rights reserved.