Influence of Heart Rate on Mortality in a French Population

TLDR

Further investigations are needed to explain the complex interactions between heart rate, pulse pressure, and cardiovascular complications. The study aimed to assess how high resting heart rate affects mortality across age, gender, and blood pressure subgroups in a French population. Researchers followed 19,386 adults aged 40–69 who had routine health exams between 1974 and 1977, classified heart rate into four categories (<60, 60–80, 81–100, >100 bpm), and tracked mortality through 1994. High resting heart rate independently predicted noncardiovascular mortality in both sexes and cardiovascular mortality in men, with risk rising across heart‑rate categories; the association in men was driven by coronary deaths, remained after adjusting for age and hypertension, and was attenuated in those with high pulse pressure.

Abstract

Abstract —The aim of the present study was to assess the effects of high heart rate on mortality in different subgroups in a French population according to age, gender, and blood pressure levels. We studied 19 386 subjects (12 123 men, 7263 women), aged 40 to 69 years, who had a routine health examination at the Centre d’Investigations Préventives et Cliniques (IPC) between 1974 and 1977. Heart rate (HR) measured by ECG was classified into 4 groups: HR1, &lt;60; HR2, 60 to 80; HR3, 81 to 100; and HR4, &gt;100 bpm. Mortality data were recorded for the period of 1974 through 1994. In both sexes, HR was a significant predictor of noncardiovascular mortality. In men, the relative risk (95% confidence interval) for cardiovascular death after adjustment for age and other risk factors in the HR2, HR3, and HR4 groups was 1.35 (1.01 to 1.80), 1.44 (1.04 to 2.00), and 2.18 (1.37 to 3.47), respectively, when compared with HR1. In women, HR did not influence cardiovascular mortality. The association of HR with cardiovascular mortality in men was (1) related to a strong association with coronary but not cerebrovascular mortality, (2) independent of age and hypertension, and (3) influenced by the level of pulse pressure; in patients with high pulse pressure (&gt;65 mm Hg), accelerated HR was not associated with increased cardiovascular mortality. In conclusion, in a large French population, accelerated resting HR represents an independent predictor of noncardiovascular mortality in both genders, and of cardiovascular mortality in men, independent of age and the presence of hypertension. Further investigations are needed to explain the complex interactions between HR, pulse pressure, and cardiovascular complications.