Second Degree Atrioventricular Block
Open Access
- 1 April 1967
- journal article
- research article
- Published by Oxford University Press (OUP) in Cardiovascular Research
- Vol. 1 (2), 150-158
- https://doi.org/10.1093/cvr/1.2.150
Abstract
Mechanisms of clinically known varieties of second degree A-V block were studied in isolated rabbit hearts, utilizing ultramicroelectrode techniques. Progressive A-V conduction delay in Wenckebach phenomenon was due mainly to depressed conduction within the A-V node, while Mobitz type 2 block was due to either block in or below His bundle or concealed re-excitation in the A-V junction. Two levels of block were demonstrated both in forward and retrograde A-V transmission.Keywords
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