Intraventricular conduction delay
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Synonyms and keywords: IVCD; IVCDs; intraventricular conduction defect; non-specific intraventricular conduction delay; non-specific intraventricular conduction defect
Overview
Intraventricular conduction delay is characterized by a prolonged time for electrical impulses to traverse the ventricles of the heart as demonstrated by a wide QRS interval or QRS prolongation. The QRS complex represents electrical activation of the ventricle. Widening of the QRS complex may reflect delayed conduction in the bundle of His, bundle branch or purkinje conduction system.
Causes
- Incomplete left bundle branch block
- Incomplete right bundle branch block
- Left anterior fascicular block
- Left bundle branch block
- Left posterior fascicular block
- Non-specific intraventricular conduction delay (NSIVCD) (when the QRS is wide and the definitions of LBBB and RBBB are not met)
- Right bundle branch block