Bundle Branch Block and Arborization Block

Sino-Auricular Block, Interference Dissociation, and Different Recovery Rates of Excitation in the Bundle Branches

“…For example, if the left bundle branch is normal, then depressed conduction in the affected right bundle branch gives rise to the picture of various degrees of incomplete right bundle branch block as originally discussed from the experimental and clinical cardiographic viewpoints by Wilson and Herrmann (1920). If both the bundle branches have similarly depressed zones of conductivity, the P-R interval is prolonged and the QRS complex is of normal duration.…”

Frank Norman Wilson

“…This field has been so extensively cultivated that it is approaching exhaustion and there is an increasing tendency to turn to the significance of abnormalities of the form of the electrocardiographic deflections as a subject of research (Wilson, 1920).…”

IRBBB Pattern after Incising a Subdivision of the Right Bundle Branch

“…The majority of experimental studies concerning this subject deal only with IRBBB produced by damage to the main stem of the right bundle branch.1)- 4) In 1917, Oppenheimer and Rothschild5) reported that certain abnormalities of the ventricular complex, the so-called "arborization block", were due to defective conduction of the impulse beyond the subdivisions of the branches of the bundle of His. Due to lack of experimental evidence, however, this conception was not accepted.1),6) Wilson and Herrmann1), 6) system. Moore and associates8) analyzed electrocardiographic changes caused by sectioning free-running false tendons in the right ventricle of dogs.…”