Intraventricular conduction delay

WikiDoc Resources for Intraventricular conduction delay
Articles
Most recent articles on Intraventricular conduction delay Most cited articles on Intraventricular conduction delay Review articles on Intraventricular conduction delay Articles on Intraventricular conduction delay in N Eng J Med, Lancet, BMJ
Media
Powerpoint slides on Intraventricular conduction delay Images of Intraventricular conduction delay Photos of Intraventricular conduction delay Podcasts & MP3s on Intraventricular conduction delay Videos on Intraventricular conduction delay
Evidence Based Medicine
Cochrane Collaboration on Intraventricular conduction delay Bandolier on Intraventricular conduction delay TRIP on Intraventricular conduction delay
Clinical Trials
Ongoing Trials on Intraventricular conduction delay at Clinical Trials.gov Trial results on Intraventricular conduction delay Clinical Trials on Intraventricular conduction delay at Google
Guidelines / Policies / Govt
US National Guidelines Clearinghouse on Intraventricular conduction delay NICE Guidance on Intraventricular conduction delay NHS PRODIGY Guidance FDA on Intraventricular conduction delay CDC on Intraventricular conduction delay
Books
Books on Intraventricular conduction delay
News
Intraventricular conduction delay in the news Be alerted to news on Intraventricular conduction delay News trends on Intraventricular conduction delay
Commentary
Blogs on Intraventricular conduction delay
Definitions
Definitions of Intraventricular conduction delay
Patient Resources / Community
Patient resources on Intraventricular conduction delay Discussion groups on Intraventricular conduction delay Patient Handouts on Intraventricular conduction delay Directions to Hospitals Treating Intraventricular conduction delay Risk calculators and risk factors for Intraventricular conduction delay
Healthcare Provider Resources
Symptoms of Intraventricular conduction delay Causes & Risk Factors for Intraventricular conduction delay Diagnostic studies for Intraventricular conduction delay Treatment of Intraventricular conduction delay
Continuing Medical Education (CME)
CME Programs on Intraventricular conduction delay
International
Intraventricular conduction delay en Espanol Intraventricular conduction delay en Francais
Business
Intraventricular conduction delay in the Marketplace Patents on Intraventricular conduction delay
Experimental / Informatics
List of terms related to Intraventricular conduction delay

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Synonyms and keywords: QRS prolongation; wide QRS; wide QRS complex; wide QRS complexes; 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

• Hypothermia
• 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

EKG Findings

The ECG is in sinus rhythm and the QRS is markedly widened with a QRS duration of 260ms. The QRS seems split and gives the impression of ventricular bigemini but note that the second QRS deflection that looks like a PVC is in fact 200 ms after the onset of the first part of the QRS and hence too early for a PVC. Of interest this patient has recurrent ventricular tachycardia which may relate to his grossly widened QRS.