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. 1975 Feb;37(2):136–149. doi: 10.1136/hrt.37.2.136

Delay and block of cardiac impulse caused by enhanced phase-4 depolarization in the His-Purkinje system.

A Kretz, H O Da Rous, J R Palumbo
PMCID: PMC484094  PMID: 123463

Abstract

The underlying mechanism of bradycardia-dependent bundle-branch and paroxysmal atrioventricular block appears to be enhancement of phase-4 depolarization in a branch or in a natural or acquired monofascicular pathway. Clinical records of these forms of impaired conduction occurring in the bundle-branches, with either longer or shorter cardiac cycle lengths, are presented and analysed. These also include the combination of Mobitz typw I atrioventricular block with variable degrees of bundle-branch block, as a representative example of narrow ventricular escape beats firing in the zone where prominent diastolic depolarization is present.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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