Intraventricular conduction delay overview
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Intraventricular conduction delay Microchapters |
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Differentiating Intraventricular conduction delay from other Disorders |
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Mugilan Poongkunran M.B.B.S [2]
Overview
The term intraventricular conduction delay or intraventricular conduction disturbances (IVCDs) refers to disturbances in the intraventricular propagation of supraventricular impulses resulting in changes in the QRS complex either in morphology or duration, or both. The QRS complex represents electrical activation of the ventricle and normally the entire process of ventricular depolarization in adults is completed within about 0.1 sec (100 msec). An IVCD is the result of abnormal activation of the ventricles caused by conduction delay or block in one or more parts of the specialized conduction system (bundle of His, bundle branch or purkinje conduction system) resulting in widening of QRS complex. Abnormalities of local myocardial activation can further alter the specific pattern of venticular activation.