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Prognostic value of global longitudinal strain in heart failure patients treated with cardiac resynchronization therapy.

Abstract：

BACKGROUND:Myocardial fibrosis (macroscopic scar or diffuse reactive fibrosis) is one of the determinants of impaired left ventricular (LV) global longitudinal strain (GLS) in heart failure (HF) patients. OBJECTIVE:The purpose of this study was to evaluate the prognostic value of LV GLS in HF patients treated with cardiac resynchronization therapy (CRT). METHODS:The study included 829 HF patients (mean age 64.6 ± 10.4 years; 72% men) treated with CRT. Before CRT implantation, LV GLS was assessed using 2-dimensional speckle tracking echocardiography. The primary endpoint was the combination of all-cause mortality, heart transplantation, and LV assist device implantation. The secondary endpoint was the occurrence of ventricular arrhythmias or appropriate implantable defibrillator device therapies. RESULTS:During follow-up, 332 patients reached the primary endpoint, and 233 presented with the secondary endpoint. Patients were divided according to LV GLS quartiles. Patients with the most impaired LV GLS quartile had a 2-fold higher risk of reaching the combined endpoint compared with patients in the best LV GLS quartile (hazard ratio [HR] 2.088; 95% confidence interval [CI] 1.555-2.804; P <.001). LV GLS was significantly associated with the combined endpoint (HR 1.075; 95% CI 1.020-1.133; P = .007) after adjusting for clinical, electrocardiographic, and echocardiographic characteristics. Although patients in the most impaired LV GLS quartile showed higher event rates for the secondary endpoint compared with the other groups, LV GLS was not independently associated with the secondary endpoint (HR 1.047; 95% CI 0.989-1.107; P = .115). CONCLUSION:In this large cohort of CRT patients, baseline LV GLS was independently associated with the combined endpoint.

journal_name

Heart Rhythm

journal_title

Heart rhythm

authors

Khidir MJH,Abou R,Yilmaz D,Ajmone Marsan N,Delgado V,Bax JJ

doi

10.1016/j.hrthm.2018.03.034

subject

Has Abstract

pub_date

2018-10-01 00:00:00

pages

1533-1539

issue

10

eissn

1547-5271

issn

1556-3871

pii

S1547-5271(18)30268-6

journal_volume

15

pub_type

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