New strict left bundle branch block criteria reflect left ventricular activation differences.
J Electrocardiol
; 48(5): 758-62, 2015.
Article
em En
| MEDLINE
| ID: mdl-26233647
ABSTRACT
AIMS:
Pacing lead electrical delays and strict left bundle branch block (LBBB) criteria were assessed against cardiac resynchronization therapy (CRT) outcome.METHODS:
Forty-nine patients with LBBB and QRS duration >130 milliseconds underwent CRT-implantation. Sensed right ventricular to left ventricular electrical delay (RV-LV-IED) was measured. Response to CRT was defined as ≥15% decrease in left ventricular end-systolic volume.RESULTS:
Eighteen of 20 (90%) patients with non-ischemic dilated cardiomyopathy (DCM) and 18 of 29 (62%) with ischemic heart disease (IHD) responded to CRT, p<0.01. When applying new strict ECG criteria subsequent rates of response in DCM were 18/19 (95%) and in IHD of 18/23 (78%) respectively, p<0.05 between IHD groups. Correspondingly, RV-LV-IED was longer in DCM compared to IHD patients and in responders compared to non-responders, p=0.017 and p<0.001, respectively.CONCLUSION:
Interventricular electrical delay predicts left ventricular remodeling after CRT and new, strict ECG criteria of LBBB are superior in predicting remodeling.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Bloqueio de Ramo
/
Disfunção Ventricular Esquerda
/
Eletrocardiografia
/
Terapia de Ressincronização Cardíaca
Tipo de estudo:
Clinical_trials
/
Diagnostic_studies
/
Prognostic_studies
Limite:
Aged
/
Female
/
Humans
/
Male
Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article