bundle branch block

Introduction

A delay in conduction of electrical impulses through one of the His bundles of the cardiac conduction system or one of its fascicles. It generally results in a widening of the QRS complex with changes in QRS axis without change in heart rate.

More general terms

• heart block
• chronic cardiac arrhythmia

More specific terms

• bifascicular block & trifascicular block
• left anterior hemiblock (LAHB)
• left bundle branch block (LBBB)
• left bundle branch hemiblock
• left posterior hemiblock (LPHB)
• right bundle branch block (RBBB)