<b>Objective</b>
<p>Higher resting heart
rate (rHR) and lower heart rate variability (HRV) are associated with increased
risk of cardiovascular disease (CVD) and all-cause mortality in people with and
without diabetes It is unknown whether temporal changes in rHR and HRV may contribute
to this risk. We investigated associations between 5-year changes in rHR and
HRV and risk of future CVD and death, taking into account participants’
baseline glycemic state. </p>
<p><b>Research design and Methods</b></p>
<p>In this prospective population-based cohort study we investigated 4,611
CVD-free civil servants (mean age 60,
SD=5.9 years, 70% men).<b> </b>rHR and/or 6 indices of HRV were
measured. Associations of 5-year change in 5-minute rHR and HRV with fatal- and
non-fatal CVD and all-cause mortality or the composite of the two were assessed
with adjustments for relevant confounders. Effect modification by glycemic
state was tested. </p>
<p><b>Results</b></p>
<p>At baseline, 63% of
participants were normoglycemic, 29% had prediabetes and 8% had diabetes.
During a median (IQR) follow-up of 11.9 (11.4;12.3) years, 298 participants
(6.5%) experienced a CVD event and 279 (6.1%) died from non-CVD related causes.
We found no association between 5-year changes in rHR and HRV and future events.
Only baseline rHR was associated with all-cause mortality. A 10 beats per
minute higher baseline level showed a 11.4% higher rate of all-cause mortality
(95%CI:1.0;22.9%, P=0.032). Glycemic state did not modify associations<b>. </b></p>
<p><b>Conclusion</b></p>
<p>Changes in rHR and HRV and possibly also
baseline values of these measures are not associated with future CVD or
mortality in people with or without dysglycemia. </p>