Lung function, percent emphysema, and QT duration: The Multi-Ethnic Study of Atherosclerosis (MESA) lung study - 18/04/17
, Gina S. Lovasi b, Elsayed Z. Soliman c, Susan R. Heckbert d, Bruce M. Psaty e, f, John H.M. Austin g, Jerry A. Krishnan h, Eric A. Hoffman i, Craig Johnson j, Matthew J. Budoff k, Karol E. Watson l, R. Graham Barr b, mAbstract |
Background |
The QT interval on electrocardiogram (ECG) reflects ventricular repolarization; a prolonged QT interval is associated with increased mortality risk. Prior studies suggest an association between chronic obstructive pulmonary disease (COPD) and prolonged QT interval. However, these studies were small and often enrolled hospital-based samples. We tested the hypotheses that lower lung function and increased percent emphysema on computed tomography (CT) are associated with a prolonged QT interval in a general population sample and additionally in those with COPD.
Methods |
As part of the Multi-Ethnic Study of Atherosclerosis (MESA) Lung Study, we assessed spirometry, full-lung CT scans, and ECGs in participants aged 45–84 years. The QT on ECGs was corrected for heart rate (QTc) using the Framingham formula. QTc values = 460 msec in women and ≥450 msec in men were considered abnormal (prolonged QTC). Multivariate regression models were used to examine the cross-sectional association between pulmonary measures and QTC.
Results |
The mean age of the sample of 2585 participants was 69 years, and 47% were men. There was an inverse association between FEV1%, FVC%, FEV1/FVC%, emphysema, QTc duration and prolonged QTc. Gender was a significant interaction term, even among never smokers. Having severe COPD was also associated with QTc prolongation.
Conclusions |
Our analysis revealed a significant association between lower lung function and longer QTc in men but not in women in a population-based sample. Our findings suggest the possibility of gender differences in the risk of QTc-associated arrhythmias in a population-based sample.
Le texte complet de cet article est disponible en PDF.Highlights |
• | Multivariate regression models were used to examine the cross-sectional association between pulmonary measures and QTC. |
• | There was an inverse association between FEV1%, FVC%, FEV1/FVC%, emphysema, QTc duration and prolonged QTc. |
• | Gender was a significant interaction term, even among never smokers. Having severe COPD was also associated with QTc prolongation. |
• | Our analysis revealed a significant association between lower lung function and longer QTc in men but not in women in a population-based sample. |
• | Our findings suggest the possibility of gender differences in the risk of QTc-associated arrhythmias in a population-based sample. |
Keywords : QT duration, QT interval, Lung function, Emphysema, COPD
Plan
Vol 123
P. 1-7 - février 2017 Retour au numéro
Article précédent
- Comparative effectiveness of mepolizumab and omalizumab in severe asthma: An indirect treatment comparison
- Sarah M. Cockle, Gillian Stynes, Necdet B. Gunsoy, Daniel Parks, Rafael Alfonso-Cristancho, Jaro Wex, Eric S. Bradford, Frank C. Albers, Jenny Willson
- A randomised, phase III trial of once-daily fluticasone furoate/vilanterol 100/25 ?g versus once-daily vilanterol 25 ?g to evaluate the contribution on lung function of fluticasone furoate in the combination in patients with COPD
- Thomas M. Siler, Atsushi Nagai, Catherine A. Scott-Wilson, Dawn A. Midwinter, Courtney Crim
Bienvenue sur EM-consulte, la référence des professionnels de santé.
L’accès au texte intégral de cet article nécessite un abonnement.
Déjà abonné à cette revue ?