The underutilization of CRT was worse with increasing age.Īge Cardiac resynchronization therapy Epidemiology Heart Failure Intraventricular conduction delay Left bundle branch block QRS width. 37%, respectively (P < 0.001).īoth IVCD and LBBB were more common with increasing age and were similarly strong independent predictors of mortality and in all ages. 4% and absent but with indication in 23% vs. In the three age groups, CRT was present in 6% vs. The adjusted P for interaction between age and QRS morphology was 0.664. Among 13 782 patients without CRT, IVCD was present in the three age groups in 11% vs. We studied 14 713 patients with ejection fraction ≤39% in the Swedish Heart Failure Registry and divided into age groups ≤65 years, 66-80 years and >80 years. We tested the hypotheses that in the elderly: (i) IVCD and LBBB are more prevalent, (ii) IVCD and LBBB are more harmful, and (iii) CRT is underutilized. doi:10.1111/echo.Age is not a contraindication to cardiac resynchronization therapy (CRT), but the prevalence and prognostic impact of QRS prolongation with intraventricular conduction delay (IVCD) and left bundle branch block (LBBB), as well as CRT utilization, may differ with age. Prevalence and long-term prognosis of patients with complete bundle branch block (right or left bundle branch) with normal left ventricular ejection fraction referred for stress echocardiography. Delayed spontaneous reversibility of left bundle branch block in non-ischemic cardiomyopathy: a case report. Conduction disorders.Ĭarvalho MV, Kroll PC, Carvalho VN. Late deterioration of left ventricular function after right ventricular pacemaker implantation. Pacemaker insertion.īellmann B, Muntean BG, Lin T, Gemein C, Schmitz K, Schauerte P. ESC Scientific Document Group, 2021 ESC Guidelines on cardiac pacing and cardiac resynchronization therapy: Developed by the Task Force on cardiac pacing and cardiac resynchronization therapy of the European Society of Cardiology (ESC) with the special contribution of the European Heart Rhythm Association (EHRA), Eur Heart J. Glikson M, Nielsen JC, Kronborg MB, et al.

Cardiomyopathy and left bundle branch block: A farewell to drugs? J Am Coll Cardiol.

Newly acquired left bundle-branch block: The Framingham study.

Among patients with NICD and a QRS 150 ms, CRT-D was associated with decreased mortality at 3 years compared with ICD alone. Schneider JF, Thomas HE Jr, Kreger BE, et al. In 11,505 nonleft BBB (non-LBBB) CRT-eligible patients, after multivariable adjustment, among patients with RBBB, CRT-D was not associated with better outcomes, compared with ICD alone, regardless of QRS duration. Etiology and left ventricular functions in left bundle branch block - a prospective observational study. New ECG criteria for acute myocardial infarction in patients with left bundle branch block. Dilated cardiomyopathy.Ĭenters for Disease Control and Prevention. Left bundle branch block-induced cardiomyopathy: A review and pooled analysis of pathophysiology, diagnosis and clinical management. Left bundle branch block: From cardiac mechanics to clinical and diagnostic challenges.

Lbbb vs ivcd