Work

The mystery of the dark tracing: a strange apparent intraventricular conduction alternance—case report

Year: 2025

Type: article

Abstract: We present the electrocardiogram (ECG) of an elderly woman with Mobitz II atrioventricular (AV) block, left bundle branch block (LBBB), and ventricular ectopic activity. At first glance, the ECG may give the misleading impression of Wenckebach periodicity and raise the suspicion of intermittent left anterior fascicular block (LAFB) and left posterior fascicular block (LPFB), suggesting an apparent alternating conduction block in the main divisions of the LBB. This intriguing appearance prompted us to present the case.

Source: Exploration of Cardiology

DOI: 10.37349/ec.2025.101269

Authors: Marcello Costantini, Mario Previtali, Lorenzo Costantini, Pasquale Caldarola, Marcelo Victor Elizari

Institutions: University of Salento, Ospedale San Paolo, Academia Nacional de Medicina

Language: English

Topic: Cardiac electrophysiology and arrhythmias

Subfield: Cardiology and Cardiovascular Medicine

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: diamond

OpenAlex ID: W4413649918