This article presents a patient with intermittent LBBB coexisting with type A preexcitation. During preexcitation, narrowing of the QRS complex occurred with disappearance of the bundle branch block pattern. The possible anatomic and electrophysiologic implications of these findings are being discussed.
ASJC Scopus subject areas
- Pulmonary and Respiratory Medicine
- Critical Care and Intensive Care Medicine
- Cardiology and Cardiovascular Medicine