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Influence of caffeine on heart rate variability in patients with long-standing type 1 diabetes

Tristan Richardson1, Adrian Rozkovec, Peter Thomas

  • 1Bournemouth Diabetes & Endocrine Centre, Royal Bournemouth Hospital, Bournemouth, UK. tristan.richardson@rbch-tr.swest.nhs.uk

Diabetes Care
|April 28, 2004
PubMed

Insights

Caffeine consumption significantly improved heart rate variability (HRV), a measure of autonomic function, in both type 1 diabetes patients and healthy individuals. This suggests caffeine may help reduce cardiovascular event risk in those with impaired autonomic function.

Area of Science:

  • Cardiovascular Health
  • Autonomic Function
  • Diabetes Research

Background:

  • Cardiovascular health effects of caffeine are debated.
  • Type 1 diabetes patients with autonomic failure face risks like sudden cardiac death.
  • Autonomic dysfunction, assessed via heart rate variability (HRV), is a concern in this population.

Purpose of the Study:

  • To investigate caffeine's impact on autonomic dysfunction in type 1 diabetes patients.
  • To compare caffeine's effects on HRV in diabetic patients versus healthy controls.

Main Methods:

  • Randomized, blinded, placebo-controlled, crossover trial.
  • 20 type 1 diabetic patients and 10 healthy volunteers participated.
  • Caffeine (250 mg twice daily) or placebo was administered for 2 weeks.

Main Results:

  • Diabetic patients exhibited blunted baseline HRV compared to controls (P < 0.0005).
  • Caffeine markedly increased HRV in both groups: +103% in diabetics (P = 0.009) and +38% in controls (P = 0.002).
  • The increase in HRV due to caffeine did not differ significantly between groups (P = 0.16).

Conclusions:

  • Moderate caffeine intake enhances autonomic function in both diabetic patients and healthy individuals.
  • Regular caffeine use could potentially mitigate cardiovascular event risk in those with abnormal HRV.
Abstract

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