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Narrowing filtered QRS duration on signal-averaged electrocardiogram predicts outcomes in cardiac resynchronization therapy patients with nonischemic heart failure

Authors :
Yoshimi Yagishita-Tagawa
Nobuhisa Hagiwara
Daigo Yagishita
Morio Shoda
Yuji Iwanami
Kotaro Arai
Tsuyoshi Shiga
Koichiro Ejima
Atsushi Suzuki
Kyomi Ashihara
Source :
Annals of noninvasive electrocardiology : the official journal of the International Society for Holter and Noninvasive Electrocardiology, Inc. 23(3)
Publication Year :
2017

Abstract

BACKGROUND: To evaluate the impact of changes in the filtered QRS duration (fQRS) on signal‐averaged electrocardiograms (SAECGs) from pre‐ to postimplantation on the clinical outcomes in nonischemic heart failure (HF) patients under cardiac resynchronization therapy (CRT). METHODS: We studied 103 patients with nonischemic HF and sinus rhythm who underwent CRT implantation. SAECGs were obtained within 1 week before and 1 week after implantation and narrowing fQRS was defined as a decrease in fQRS from pre‐ to postimplantation. Echocardiography was performed before and 6 months after CRT implantation. The primary outcome was death from any cause. The secondary outcomes were hospitalization due to worsened HF and occurrence of ventricular tachyarrhythmias. RESULTS: Of the 103 CRT patients, 53 (51%) showed narrowing fQRS. Left ventricular end‐diastolic volume and end‐systolic volume were significantly reduced (both p

Details

ISSN :
1542474X
Volume :
23
Issue :
3
Database :
OpenAIRE
Journal :
Annals of noninvasive electrocardiology : the official journal of the International Society for Holter and Noninvasive Electrocardiology, Inc
Accession number :
edsair.doi.dedup.....e742ea1cb2f852f1f3263dc35da19ab0