Bundle-Branch Block

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  Subject Areas on Research

  • A troubled marriage: When electrical and mechanical dyssynchrony don't go along. 
  • Activation delay-induced mechanical dyssynchrony in single-ventricle heart disease. 
  • Acute myocardial infarction and complete bundle branch block at hospital admission: clinical characteristics and outcome in the thrombolytic era. GUSTO-I Investigators. Global Utilization of Streptokinase and t-PA [tissue-type plasminogen activator] for Occluded Coronary Arteries. 
  • Analysis of Conduction Abnormalities and Permanent Pacemaker Implantation After Transcatheter Aortic Valve Replacement. 
  • Association between vectorcardiographic QRS area and incident heart failure diagnosis and mortality among patients with left bundle branch block: A register-based cohort study. 
  • Cardiac Resynchronization Therapy Improves Outcomes in Patients With Intraventricular Conduction Delay But Not Right Bundle Branch Block: A Patient-Level Meta-Analysis of Randomized Controlled Trials. 
  • Cardiac conduction system disease after transcatheter aortic valve replacement. 
  • Cardiac resynchronization therapy in chronic heart failure with moderately reduced left ventricular ejection fraction: Lessons from the Multicenter InSync Randomized Clinical Evaluation MIRACLE EF study. 
  • Cardiac resynchronization therapy: Identifying an activation delay by regional strain analysis. 
  • Chronic pacing and adverse outcomes after transcatheter aortic valve implantation. 
  • Classic-pattern dyssynchrony and electrical activation delays in pediatric dilated cardiomyopathy. 
  • Clinical significance of exercise-induced bundle branch block. 
  • Comparison of Incidence of Left Ventricular Systolic Dysfunction Among Patients With Left Bundle Branch Block Versus Those With Normal QRS Duration. 
  • Comparison of clinical characteristics, treatments and outcomes of patients with ST-elevation acute myocardial infarction with versus without new or presumed new left bundle branch block (from NCDR®). 
  • Comparison of electrocardiogram and intrathoracic electrogram signals for detection of ischemic ST segment changes during normal sinus and ventricular paced rhythms. 
  • Comparison of the relation between left ventricular anatomy and QRS duration in patients with cardiomyopathy with versus without left bundle branch block. 
  • Complete heart block complicating retrograde left ventricular catheterization: case report and review. 
  • Compromised atrial coronary anatomy is associated with atrial arrhythmias and atrioventricular block complicating acute myocardial infarction. 
  • Concomitant changes in ventricular depolarization and repolarization and long-term outcomes of biventricular pacing. 
  • Contractile Fronts In The Interventricular Septum: A Case For High Frame Rate Echocardiographic Imaging. 
  • Diagnosing acute myocardial infarction in patients with left bundle branch block. 
  • Diagnostic accuracy of SPECT and PET myocardial perfusion imaging in patients with left bundle branch block or ventricular-paced rhythm. 
  • Ebstein's anomaly of the tricuspid valve: a Wolf(f) in sheep's clothing. 
  • Editorial commentary: Harm from left bundle branch block: We are the tortoise, not the hare. 
  • Effect of rate-dependent left bundle branch block on global and regional left ventricular function. 
  • Effectiveness of Cardiac Resynchronization Therapy by QRS Morphology in the Multicenter Automatic Defibrillator Implantation Trial-Cardiac Resynchronization Therapy (MADIT-CRT). 
  • Ejection fraction in left bundle branch block is disproportionately reduced in relation to amount of myocardial scar. 
  • Electrocardiographic QRS duration and the risk of congestive heart failure: the Framingham Heart Study. 
  • Electrocardiographic diagnosis of evolving acute myocardial infarction in the presence of left bundle-branch block. GUSTO-1 (Global Utilization of Streptokinase and Tissue Plasminogen Activator for Occluded Coronary Arteries) Investigators. 
  • Electrocardiographic features of arrhythmogenic right ventricular dysplasia. 
  • Electrocardiographic predictors of arrhythmic death and total mortality in the multicenter unsustained tachycardia trial. 
  • Electrophysiological basis and genetics of Brugada syndrome. 
  • Evaluating strict and conventional left bundle branch block criteria using electrocardiographic simulations. 
  • Evaluation of T-Wave Morphology in Patients With Left Bundle Branch Block and Suspected Acute Coronary Syndrome. 
  • Feasibility of combining serial smartphone single-lead electrocardiograms for the diagnosis of ST-elevation myocardial infarction. 
  • Functional abnormalities in isolated left bundle branch block. The effect of interventricular asynchrony. 
  • Identification of Typical Left Bundle Branch Block Contraction by Strain Echocardiography Is Additive to Electrocardiography in Prediction of Long-Term Outcome After Cardiac Resynchronization Therapy. 
  • Immediate and remote prognostic significance of fascicular block during acute myocardial infarction. 
  • Immediate mechanical effects of acute left bundle branch block by speckle tracked strain. 
  • Impact of Balloon Predilatation on Hemodynamics and Outcomes After Transcatheter Aortic Valve Implantation With the Self-Expanding CoreValve Prosthesis. 
  • Impact of cardiovascular events on change in quality of life and utilities in patients after myocardial infarction: a VALIANT study (valsartan in acute myocardial infarction). 
  • Impaired Recovery of Left Ventricular Function in Patients With Cardiomyopathy and Left Bundle Branch Block. 
  • Incidence and clinical relevance of the occurrence of bundle-branch block in patients treated with thrombolytic therapy. 
  • Incidence of strict versus nonstrict left bundle branch block after transcatheter aortic valve replacement. 
  • Index of contractile asymmetry improves patient selection for CRT: a proof-of-concept study. 
  • Indications for pacing in the treatment of bradyarrhythmias. Report of an independent study group. 
  • Influence of QRS infarct score and QRS duration prior to transcatheter aortic valve replacement on follow-up left ventricular end systolic volume in patients with new persistent left bundle branch block. 
  • Lead one ratio in left bundle branch block predicts poor cardiac resynchronization therapy response. 
  • Left Bundle Branch Block Before Transcatheter Aortic Valve Replacement. 
  • Left Bundle Branch Block: Is it "Unsafe at Any Speed"? 
  • Left bundle branch block in non-ST-segment elevation acute coronary syndromes. Incidence, angiographic characteristics, and clinical outcomes. 
  • Left bundle branch block predicts better survival in women than men receiving cardiac resynchronization therapy: long-term follow-up of ∼ 145,000 patients. 
  • Left bundle branch block without a typical contraction pattern is associated with increased risk of ventricular arrhythmias in cardiac resynchronization therapy patients. 
  • Left bundle branch block-induced left ventricular remodeling and its potential for reverse remodeling. 
  • Left bundle branch block: angiographic segmental wall motion abnormalities. 
  • Left bundle-branch block is associated with asimilar dyssynchronous phenotype in heart failure patients with normal and reduced ejection fractions. 
  • Left bundle-branch block: the relationship between electrocardiogram electrical activation and echocardiography mechanical contraction. 
  • Left ventricular mechanical dyssynchrony by cardiac magnetic resonance is greater in patients with strict vs nonstrict electrocardiogram criteria for left bundle-branch block. 
  • Left ventricular regional contraction abnormalities by echocardiographic speckle tracking in combined right bundle branch with left anterior fascicular block compared to left bundle branch block. 
  • Localization of myocardial scar in patients with cardiomyopathy and left bundle branch block using electrocardiographic Selvester QRS scoring. 
  • Localization of the site of ventricular premature complexes by radionuclide angiographic phase imaging. 
  • Low lead one ratio predicts clinical outcomes in left bundle branch block. 
  • Myocardial scar in sarcoidosis by 12-lead ECG and pathology. 
  • New-onset left bundle branch block after transcatheter aortic valve replacement is associated with adverse long-term clinical outcomes in intermediate-risk patients: an analysis from the PARTNER II trial. 
  • Nonfatal myocardial infarction in medically treated patients with coronary artery disease. 
  • Novel Brugada SCN5A mutation causing sudden death in children. 
  • PR Prolongation predicts inadequate resynchronization with biventricular pacing in left bundle branch block. 
  • PR interval identifies clinical response in patients with non-left bundle branch block: a Multicenter Automatic Defibrillator Implantation Trial-Cardiac Resynchronization Therapy substudy. 
  • Patients with prolonged ischemic chest pain and presumed-new left bundle branch block have heterogeneous outcomes depending on the presence of ST-segment changes. 
  • Peeling back of left bundle branch refractoriness facilitates mapping of a hemodynamically unstable atrial flutter. 
  • Permanent His-Bundle Pacing: An Adolescent with Promise. 
  • Predicting the Development of Reduced Left Ventricular Ejection Fraction in Patients With Left Bundle Branch Block. 
  • Prevalence and prognostic impact of bundle branch block in patients with heart failure: evidence from the CHARM programme. 
  • Prognostic effect of bundle branch block related to coronary artery bypass grafting. 
  • Prognostic implication of activated partial thromboplastin time after reteplase or half-dose reteplase plus abciximab: results from the GUSTO-V trial. 
  • Prognostic significance of isolated sinus tachycardia during first three days of acute myocardial infarction. 
  • QRS duration, bundle-branch block morphology, and outcomes among older patients with heart failure receiving cardiac resynchronization therapy. 
  • QRS fusion complex analysis using wave interference to predict reverse remodeling during cardiac resynchronization therapy. 
  • Quantification of ST-segment changes during coronary angioplasty in patients with left bundle branch block. 
  • Race and Sex Differences in QRS Interval and Associated Outcome Among Patients with Left Ventricular Systolic Dysfunction. 
  • Relationship of age and exercise performance in patients with heart failure: the HF-ACTION study. 
  • Reply: Early Cardiac Resynchronization Therapy for Left Bundle Branch Block-Associated Cardiomyopathies. 
  • Response to letter regarding, "PR interval identifies clinical response in patients with non-left bundle branch block: a multicenter automatic defibrillator implantation trial-cardiac resynchronization therapy sub-study" by Kutyifa et al. 
  • Right, but not left, bundle branch block is associated with large anteroseptal scar. 
  • Role of Mahaim fibers in cardiac arrhythmias in man. 
  • Sarcoidosis with incomplete bilateral bundle branch block pattern disappearing following steroid therapy: an electrophysiological study. 
  • Scar burden assessed by Selvester QRS score predicts prognosis, not CRT clinical benefit in preventing heart failure event and death: A MADIT-CRT sub-study. 
  • Segment Length in Cine Strain Analysis Predicts Cardiac Resynchronization Therapy Outcome Beyond Current Guidelines. 
  • Simple regional strain pattern analysis to predict response to cardiac resynchronization therapy: rationale, initial results, and advantages. 
  • Size Matters: Normalization of QRS Duration to Left Ventricular Dimension Improves Prediction of Long-Term Cardiac Resynchronization Therapy Outcome. 
  • Specificity for each of the 46 criteria of the Selvester QRS score for electrocardiographic myocardial scar sizing in left bundle branch block. 
  • Strategic lessons from the clinical event classification process for the Assessment of Pexelizumab in Acute Myocardial Infarction (APEX-AMI) trial. 
  • Survival with cardiac-resynchronization therapy in mild heart failure. 
  • The Association of a classical left bundle Branch Block Contraction Pattern by vendor-independent strain echocardiography and outcome after cardiac resynchronization therapy. 
  • The ability of the electrocardiogram in left bundle branch block to detect myocardial scar determined by cardiovascular magnetic resonance. 
  • The association between biventricular pacing and cardiac resynchronization therapy-defibrillator efficacy when compared with implantable cardioverter defibrillator on outcomes and reverse remodelling. 
  • The effect of intermittent atrial tachyarrhythmia on heart failure or death in cardiac resynchronization therapy with defibrillator versus implantable cardioverter-defibrillator patients: a MADIT-CRT substudy (Multicenter Automatic Defibrillator Implantation Trial With Cardiac Resynchronization Therapy). 
  • The electromechanical substrate for response to cardiac resynchronization therapy in patients with right bundle branch block. 
  • The interaction among sex, hemoglobin and outcomes in a specialty heart failure clinic. 
  • The left bundle-branch block puzzle in the 2013 ST-elevation myocardial infarction guideline: from falsely declaring emergency to denying reperfusion in a high-risk population. Are the Sgarbossa Criteria ready for prime time? 
  • The mechanical and hemodynamic effects of left ventricular pacing in heart failure with preserved ejection fraction and left bundle branch block. 
  • The noninvasive localization of ventricular pacing sites by radionuclide phase imaging. 
  • Trends in acute reperfusion therapy for ST-segment elevation myocardial infarction from 1999 to 2006: we are getting better but we have got a long way to go. 
  • Unraveling the spectrum of left bundle branch block in acute myocardial infarction: insights from the Assessment of the Safety and Efficacy of a New Thrombolytic (ASSENT 2 and 3) trials. 
  • Validation of the modified Sgarbossa criteria for acute coronary occlusion in the setting of left bundle branch block: A retrospective case-control study. 
  • Vectorcardiographic QRS area is associated with long-term outcome after cardiac resynchronization therapy. 
  • Worth Remembering: Cardiac Memory Presenting as Deep Anterior T-Wave Inversions Explained by Intermittent Left Bundle Branch Block. 
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  Keywords of People

  • Curtis, Lesley H., Professor in Population Health Sciences, Medicine, General Internal Medicine
  • Granger, Christopher Bull, Professor of Medicine, School of Nursing
  • O'Connor, Christopher Michael, Adjunct Professor in the Department of Medicine, Medicine, Clinical Pharmacology