P Wave Duration and Risk of Longitudinal Atrial Fibrillation in Persons ≥60 Years Old (from the Framingham Heart Study) - 06/08/11
Résumé |
Long-term risk prediction is a priority for the prevention of atrial fibrillation (AF). P wave indices are electrocardiographic measurements describing atrial conduction. The role of P wave indices in the prospective determination of AF and mortality risk has had limited assessment. We quantified by digital caliper the P wave indices of maximum duration and dispersion in 1,550 Framingham Heart Study participants ≥60 years old (58% women) from single-channel electrocardiograms recorded from 1968 through 1971. We examined the association of selected P wave indices and long-term outcomes using Cox proportional hazards regression incorporating age, gender, body mass index, systolic blood pressure, treatment for hypertension, significant murmur, heart failure, and PR interval. Over a median follow-up of 15.8 years (range 0 to 38.7), 359 participants developed AF and 1,525 died. Multivariable-adjusted hazard ratios (HRs) per SD increase in maximum P wave duration were 1.15 (95% confidence interval [CI] 0.90 to 1.47, p = 0.27) for AF and 1.02 (95% CI 0.96 to 1.08, p = 0.18) for mortality. The upper 5% of P wave maximum duration had a multivariable-adjusted HR of 2.51 (95% CI 1.13 to 5.57, p = 0.024) for AF and an HR of 1.11 (95% CI 0.87 to 1.40, p = 0.20) for mortality. We found no significant associations between P wave dispersion with incidence of AF or mortality. In conclusion, maximum P wave duration at the upper fifth percentile was associated with long-term AF risk in an elderly community-based cohort. P wave duration is an electrocardiographic endophenotype for AF.
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This research was funded by Award 09FTF2190028 from the American Heart Association, Dallas, Texas to Dr. Magnani and Grants N01-HC 25195, RC1HL101056, and 1R01HL102214 (Dr. Benjamin), 1HL104156 (Dr. Ellinor), and HL092577 (Dr. Ellinor and Dr. Benjamin) from the National Institutes of Health, Bethesda, Maryland. |
Vol 107 - N° 6
P. 917 - mars 2011 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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