© 2003 by European Society of Cardiology
ISSUE CARDIOGRAM
Unusual form of AV nodal Wenckebach block
Cardiovascular Research and Teaching Institute Aalst Aalst, Belgium
Abstract
A 73 year-old man had a fast atrioventricular (AV) nodal pathway accidentally ablated 4 years before, while attempting to ablate a septally located concealed accessory pathway (AP). After initiation of treatment with beta-blockers, because of systemic arterial hypertension, the patient presented to the emergency room complaining of a markedly diminished exercise tolerance. The 12 lead ECG showed an interesting AV nodal Wenckebach sequence, interrupted by P waves retrogradely conducted through the AP. The mechanisms explaining the ECG are discussed.
Key Words: Fast pathway ablation, AV block, Wenckebach block, concealed accessory pathway
Correspondence: Pedro Brugada, Cardiovascular Center, OLV Hospital, Moorselbaan 164, 9300 Aalst, Belgium. Fax: +32-53-72-4185; E-mail: pedro.brugada{at}pi.be