Electrocardiographic criteria of true left bundle branch block: A simple sign to predict a better clinical and instrumental response to CRT

Giosuè Mascioli, Luigi Padeletti, Biagio Sassone, Massimo Zecchin, Elena Lucca, Stefania Sacchi, Giulio Boggian, Anna Ludovica Tondo, Chiara Belvito, Nikoloz Bakhtadze, Alessio Borrelli, Gianfranco Sinagra

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Cardiac resynchronization therapy (CRT) has proved to be very effective in improving morbidity and mortality in patients affected with severe congestive heart failure. Its efficacy has been shown to be greater in patients with left bundle branch block (LBBB). The aim of our study was to verify if newly proposed criteria for true LBBB identify patients with a better clinical and instrumental response to CRT. Methods: Between May 2007 and April 2011, 111 patients with left ventricular ejection fraction (LVEF) ≤ 35% and LBBB morphology received a CRT device and were divided into two groups according to QRS morphology. Group 1 (61 patients) consisted of patients with LBBB morphology; group 2 (50 patients) consisted of patients with LBBB. The primary endpoint was the utility of criteria for true LBBB to predict a composite endpoint of all-cause mortality and hospital admission with heart failure. The secondary endpoint was the utility of the same criteria to predict an absolute increase in LVEF ≥ 10%. Results: LBBB morphology and a dose of bisoprolol

Original languageEnglish
Pages (from-to)927-934
Number of pages8
JournalPACE - Pacing and Clinical Electrophysiology
Volume35
Issue number8
DOIs
Publication statusPublished - Aug 2012

Keywords

  • CRT
  • left bundle branch block
  • morbidity
  • mortality

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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