Elevated resting heart rate is associated with greater risk of cardiovascular and all-cause mortality in current and former smokers |
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Authors: | Magnus T Jensen Jacob L MarottGorm B Jensen |
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Institution: | a Department of Cardiology, Copenhagen University Hospital Gentofte, Niels Andersens Vej 65, 2900 Hellerup, Denmark.b The Copenhagen City Heart Study, Copenhagen University Hospital Bispebjerg, Bispebjerg Bakke 23, 2400 Copenhagen NV, Denmarkc Department of Cardiology, Copenhagen University Hospital Hvidovre, Kettegaards Alle 30, 2650 Hvidovre, Denmark |
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Abstract: | BackgroundElevated resting heart rate is associated with mortality in general populations. Smokers may be at particular risk. The association between resting heart rate (RHR), smoking status and cardiovascular and total mortality was investigated in a general population.MethodsProspective study of 16,516 healthy subjects from the Copenhagen City Heart Study. 8709 deaths, hereof 3821 cardiovascular deaths, occurred during 33 years of follow-up.ResultsIn multivariate Cox models with time-dependent covariates RHR was significantly associated with both cardiovascular and total mortality. Current and former smokers had, irrespective of tobacco consumption, greater relative risk of elevated RHR compared to never smokers. The relative risk of all-cause mortality per 10 bpm increase in RHR was (95% CI): 1.06 (1.01-1.10) in never smokers, 1.11 (1.07-1.15) in former smokers, 1.13 (1.09-1.16) in moderate smokers, and 1.13 (1.10-1.16) in heavy smokers. There was no gender difference. The risk estimates for cardiovascular and all-cause mortality were essentially similar.In univariate analyses, the difference in survival between a RHR in the highest (> 80 bpm) vs lowest quartile (< 65 bpm) was 4.7 years in men and 3.6 years in women. In multivariate analyses, the difference was about one year in never smokers and about two years in current and former smokers.ConclusionsIn a healthy population resting heart rate is associated with total and cardiovascular mortality. Elevated resting heart rate is associated with greater risk in subjects with a history of smoking than in never smokers. |
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Keywords: | Resting heart rate Mortality Smoking Prevention Risk factors |
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