Prevalence, predictors and prognostic implications of PR interval prolongation in patients with heart failure

Nikolaidou, Theodora and Pellicori, Pierpaolo and Zhang, Jufen and Kazmi, Syed and Goode, Kevin M. and Cleland, John G.F. and Clark, Andrew L. (2017) Prevalence, predictors and prognostic implications of PR interval prolongation in patients with heart failure. Clinical Research in Cardiology. pp. 1-12. ISSN 1861-0692

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Official URL: http://dx.doi.org/10.1007/s00392-017-1162-6

Abstract

Aims: To determine the prevalence, incidence, predictors and prognostic implications of PR interval prolongation in patients referred with suspected heart failure. Methods and Results: Consecutive patients referred with suspected heart failure were prospectively enrolled. After excluding patients with implantable cardiac devices and atrial fibrillation, 1420 patients with heart failure and reduced ejection fraction (HeFREF) [age: median 71 (interquartile range IQR: 63-78) years; men: 71%; NT-ProBNP: 1319 (583-3378) ng/L], 1094 with heart failure and normal ejection fraction (HeFNEF) [age: 76 (70-82) years; men: 47%; NT-ProBNP: 547 (321-1171) ng/L], and 1150 without heart failure [age: 68 (60-75) years; men: 51%; NT-ProBNP: 86 (46-140) ng/L] were included. The prevalence of first degree heart block [heart-rate corrected PR interval (PRc) >200 ms] was higher in patients with heart failure (21% HeFREF, 20% HeFNEF, 9% without heart failure). In patients with HeFREF or HeFNEF, longer baseline PRc was associated with greater age, male sex, and longer QRS duration and, in those with HeFREF, treatment with amiodarone or digoxin. Patients with heart failure in the longest PRc quartile had worse survival compared to shorter PRc quartiles but PRc was not independently associated with survival in multivariable analysis. For patients without heart failure, shorter baseline PRc was independently associated with worse survival. Conclusion: PRc prolongation is common in patients with HeFREF or HeFNEF and associated with worse survival, although not an independent predictor of outcome. The results of clinical trials investigating the therapeutic potential of shortening the PR interval by pacing are awaited.

Item Type: Journal Article
Keywords: First degree heart block, Heart failure, PR interval
Faculty: Faculty of Medical Science
Depositing User: Jufen Zhang
Date Deposited: 12 Oct 2017 15:30
Last Modified: 12 Oct 2017 15:30
URI: http://arro.anglia.ac.uk/id/eprint/702316

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