Atrioventricular block after reciprocating atrioventricular junctional tachycardia. |
| |
Authors: | J M Aranda F Moleiro A Castellanos B Befeler |
| |
Affiliation: | From the Cardiovascular Laboratory, Veterans Administration Hospital and the Division of Cardiology, University of Miami School of Medicine, Miami, Fla., USA |
| |
Abstract: | Short runs of symptomatic atrioventricular (A-V) block occurred after spontaneous cessation of reciprocating A-V junctional tachycardia in a patient with right bundle branch block, normal H-V interval and sinus nodal dysfunction. These episodes were characterized by long (more than 1 sec) P-P intervals during which the A deflections were not followed by His bundle electrograms. Three possible explanations are: (1) a posttachycardia-induced period of abnormally prolonged A-V nodal refractoriness; (2) pseudo-A-V block produced by concealed A-V junctional tachycardia, or (3) bradycardia-dependent (phase 4) A-V block at the "upper" His bundle, above the site from which the H deflection was recorded. |
| |
Keywords: | Address for reprints: Benjamin Befeler MD Cardiovascular Laboratory Veterans Administration Hospital 1201 N.W. 16th St. Miami Fla. 33125. |
本文献已被 ScienceDirect 等数据库收录! |