Abstract:
INTRODUCTION:Stroke associated with atrial fibrillation (AF) is more frequent in heart failure. It is unknown what variables predict future AF in these patients and how AF might evolve over time. We investigated this in patients with implantable cardiac defibrillators (ICD) where AF detection is optimal. METHODS:Single centre, retrospective, observational cohort study. All ischaemic cardiomyopathy patients with dual chamber, primary prevention ICD implants between Aug 2003 and Dec 2009 were screened and included if at implant, they had no known AF history. Nine variables were analysed. AF was defined as any atrial tachyarrhythmia ≥180 bpm and ≥30 s. Multivariable, binary logistic regression models were built by adding variables significant in the univariate models. Variables were retained in the final multivariate models if p<0.05. RESULTS:n=197 met the inclusion criteria (85.8% male, median age: 66.8 years). After median follow-up for 2.8 years, 44.2% developed AF. After univariate analysis, the baseline variables associated with AF after implant were age, NYHA class and renal impairment (RI, defined eGFR<60 ml/min/1.73 m2) (p<0.05). After multivariable analysis, the only variable which was associated with AF was RI (HR: 2.04 (CI: 1.10-3.79)). Two baseline variables were independently associated with all-cause mortality: RI (HR: 2.42 (1.14-5.12)) and non-white ethnicity. CONCLUSION:RI at time of implant was independently associated with both future AF and all-cause mortality during long-term follow-up. RI was a stronger predictor of AF than age. Those patients with heart failure and RI should be regularly screened for asymptomatic AF, regardless of age, to ensure that stroke prophylaxis may be initiated.
journal_name
Int J Cardioljournal_title
International journal of cardiologyauthors
Campbell NG,Cantor EJ,Sawhney V,Duncan ER,DeMartini C,Baker V,Diab IG,Dhinoja M,Earley MJ,Sporton S,Davies LC,Schilling RJdoi
10.1016/j.ijcard.2014.05.023subject
Has Abstractpub_date
2014-08-01 00:00:00pages
328-32issue
2eissn
0167-5273issn
1874-1754pii
S0167-5273(14)01006-7journal_volume
175pub_type
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