bun·dle-branch block (BBB),

intraventricular block due to interruption of conduction in one of the two main branches of the atrioventricular bundle and manifested in the electrocardiogram by marked prolongation of the QRS complex; block of each branch has distinctive QRS morphology.

Farlex Partner Medical Dictionary © Farlex 2012

bundle-branch block

A defect in the passage of electrical impulses through either the right or left branches that divide from the bundle of His, which supply the “wiring” for the right and left ventricles, often resulting in delayed conduction though either bundle branch.

Clinical findings
Generally asymptomatic; if symptomatic, fainting, slowed heart rate.

Aetiology
Cardiomyopathy, myocarditis, infarction, post-surgery.

bun·dle-branch block

(bŭn'dĕl-branchblok)

Intraventricular block due to interruption of conduction in one of the two main branches of the bundle of His and manifested in the electrocardiogram by marked prolongation of the QRS complex. Block to each branch has distinctive QRS morphology.

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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References in periodicals archive

Treatment and outcomes of left bundle-branch block patients with myocardial infarction who present without chest pain.

A STUDY OF BUNDLE BRANCH BLOCK AS A PROGNOSTIC INDICATOR IN PATIENTS OF ACUTE MYOCARDIAL INFARCTION

Prediction of cardiac events in patients having left bundle-branch block with/without chest pain using dipyridamole technetium-99m-sestamibi myocardial perfusion imaging.

VISUAL QUANTIFICATION OF ADENOSINE STRESS INDUCED TC-99M MIBI MYOCARDIAL PERFUSION SPECT IN LEFT BUNDLE BRANCH BLOCK AND IT'S COMPARISON WITH CORONARY ANGIOGRAPHY

Kontos MC, Aziz HA, Chau VQ, Roberts CS, Ornato JP, Vetrovec GW (2011) Outcomes in patients with chronicity of left bundle-branch block with possible acute myocardial infarction.

LBBB in the aftermode

Fresco et al., "Cumulative effect of complete left bundle-branch block and chronic atrial fibrillation on 1-year mortality and hospitalization in patients with congestive heart failure: a report from the Italian network on congestive heart failure (in-CHF database)," European Heart Journal, vol.

Predictors of cardiac resynchronization therapy response: the pivotal role of electrocardiogram

Abnormal T waves can indicate myocardial ischemia or infarction, pericarditis, hyperkalemia, ventricular hypertrophy, bundle-branch block, or subarachnoid hemorrhage (Huff, 2006).

Systematic cardiac rhythm strip analysis

In our post-treatment follow-up, chronic Chagas disease is indicated in three patients on the basis of these ECG findings: left anterior fascicular block, atrioventricular dissociation and intermittent left bundle-branch block, and right bundle-branch block and left posterior fascicular block, despite there being no clinical manifestation of these conditions.

Brote urbano de enfermedad aguda de Chagas en la region amazonica de Brasil: seguimiento de cuatro anos despues del tratamiento con benznidazol

Bundle-branch block in middle-aged men: risk of complications and death over 28 years The Primary Prevention Study in Goteborg, Sweden.

Multislice computed tomography coronary angiography: risk stratification of patients in the perioperative period

The American College of Cardiology and the American Heart Association revised their guidelines in 1999, elevating early mechanical intervention for cardiogenic shock to a class I recommendation for patients younger than 75 with an ST-elevation left bundle-branch block acute MI.

PCI, CABG for cardiogenic shock

The study enrolled patients with ST segment--elevation MI or new bundle-branch block who presented within 12 hours of symptom onset.

Low-molecular-weight heparin may aid acute MI: reviparin improved patient outcomes in thrombolysis with streptokinase or urokinase

Schlapfer, "Atrial fibrillation, complete atrioventricular block and escape rhythm with bundle-branch block morphologies: an exceptional presentation of Lyme carditis," International Journal of Cardiology, vol.

A Case of Lyme Carditis Presenting with Atrial Fibrillation