Cited by 49Cardiac pacing and defibrillation studiesCardiac Arrest and ResuscitationCardiac electrophysiology and arrhythmias

Prognostic Value of Electrocardiographic Measurements Before and After Cardiac Resynchronization Device Implantation in Patients With Heart Failure due to Ischemic or Nonischemic Cardiomyopathy

Iler, Mark A., Hu, Tingfei, Ayyagari, Sunil, Callahan, Thomas D., Civello, Kenneth C., Thal, Sergio G., Wilkoff, Bruce L., Chung, Mina K.·2008·The American Journal of Cardiology

Abstract

Postimplant QRS narrowing may predict clinical response after cardiac resynchronization therapy (CRT), but identification of nonresponders remains difficult. We studied the predictive value of electrocardiographic characteristics for mortality or cardiac transplantation in patients after CRT. Patients who had electrocardiograms available for review from before and after CRT device implantation were identified from a clinical database. Bivariate and multivariate Cox regression analyses were performed for the end point of death or transplantation. Of 337 patients (age 65+/-12 years, 76% men, left ventricular ejection fraction 22+/-12%, pre-QRS 175+/-30 ms), 84 died and 7 underwent transplantation during a follow-up of 27+/-15 months. Variables predictive of death or transplantation included QRS increase after CRT (45% vs 32%, p=0.03), older age, higher New York Heart Association class, lower left ventricular ejection fraction, and higher tertile of postimplant QRS (p=0.04), but not preimplant rhythm, QRS duration, or QRS morphology. After adjusting for confounding variables, independent predictors of mortality were older age (hazard ratio [HR] 1.03, 95% confidence interval [CI] 1.00 to 1.05, p=0.04), lack of angiotensin-converting enzyme inhibitor or angiotensin receptor blocker (HR 2.17, 95% CI 1.16 to 4.08, p<0.02), and longer postimplant QRS by tertile (HR 1.50, 95% CI 1.09 to 2.05, p=0.01). In conclusion, wider QRS after CRT device implantation is an independent predictor of mortality or transplantation. In patients with increased QRS durations despite CRT, closer follow-up or reassessment for alternative management strategies may be warranted.

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Crossref · 10.1016/j.amjcard.2007.08.043

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  • Wider QRS after CRT device implantation is an independent predictor of mortality or transplantation.

    “Wider QRS after CRT device implantation was found to be an independent predictor of mortality or transplantation.22”

    From The Year of 2008 in Electrocardiology (2010) · cites this paper as [22]

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Authors
Iler, M. A., Hu, T., Ayyagari, S., Callahan, T. D., Civello, K. C., Thal, S. G., Wilkoff, B. L., & Chung, M. K.
Affiliations
Cleveland Clinic (US)
Corresponding author
Chung, Mina K.
Venue
The American Journal of Cardiology
Publisher
Elsevier BV
Published
2008-02
Volume
101
Issue
3
Pages
359-363
ISSN
0002-9149 (ISSN-L)
OpenAlex
W1989381751
Cited by
49
References
18
Citations by year
2025: 1 · 2024: 1 · 2023: 2 · 2021: 3 · 2019: 3 · 2018: 7 · 2017: 3 · 2016: 3 · 2015: 1 · 2014: 4 · 2013: 2 · 2012: 4
FWCI
1.64
Type
journal article
Language
en
Open access
closed
Locations
  • The American Journal of Cardiology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac pacing and defibrillation studies
  • Health Sciences › Medicine › Emergency Medicine › Cardiac Arrest and Resuscitation
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac electrophysiology and arrhythmias
Keywords
cardiac resynchronization therapy, heart failure, QRS widening, electrocardiographic predictors, mortality, heart transplantation, ischemic cardiomyopathy, non-ischemic cardiomyopathy, ACE inhibitors, angiotensin receptor blockers, prognostic factors
MeSH terms
Aged, Electrocardiography, Female, Heart Conduction System, Heart Failure, Humans, Male, Middle Aged, Cardiomyopathies, Pacemaker, Artificial, Prognosis, Retrospective Studies, Stroke Volume, Heart Transplantation, Defibrillators, Implantable, Myocardial Ischemia

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