Longitudinal dissociation in the His bundle. Bundle branch block due to asynchronous conduction within the His bundle in man.

Longitudinal dissociation in the His bundle. Bundle branch block due to asynchronous conduction within the His bundle in man.

Asynchronous Conduction within the His Bundle in Man

18. von der Groeben J, Fisher DD, Toole JG: Temporospatial frequency distribution of P, QRS, and T in normal man and woman. Am Heart J 75: 487, 1968 19. Ishikawa H: Sex and age differences in the Frank vectorcardiograms of normal Japanese adults. Jap Circ J 37: 543, 1973 20. Simonson E: The effect of age on the electrocardiogram. Am J Cardiol 29: 64, 1972 21. McCall BW, Wallace AG, Estes EH Jr:...

His Bundle electrogram in bundle-branch block.

SUMMARY Because a great majority of patients with chronic complete heart block have bilateral bundle-branch lesions, it becomes important to recognize earlier degrees of bilateral bundle-branch block. The H-V interval in the His bundle electrogram during unilateral bundle-branch block reflects the conduction primarily through the contralateral bundle branch, and thus the His bundle electrogram ...

Conduction disturbances located within the His bundle.

SUMMARY Four patients are described with different degrees of conduction disturbance within the His bundle. In one patient with a Mobitz type II atrioventricular (A-V) block with normal QRS complexes the blocked atrial beats were followed by a His potential. Since the QRS complexes of the conducted beats were completely normal, the site of the block was thought to be in the distal part of the H...

Normalization of bundle branch block patterns by distal His bundle pacing. Clinical and experimental evidence of longitudinal dissociation in the pathologic his bundle.

Clinical and experimental observations in which bundle branch block patterns (BBBP) in ECG leads were normalized by distal His bundle (H) pacing are reported. The clinical material includes four patients with acute right BBBP secondary to anterior wall myocardial infarction and three patients with chronic left BBBP. Six of the seven patients had a prolonged H-V interval (60-85 msec) including t...