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Risk factors for cardiac autonomic neuropathy in type 1 diabetes mellitus

D R Witte1, S Tesfaye, N Chaturvedi

  • 1Department of Epidemiology and Public Health, Royal Free and University College London Medical School, 1-19 Torrington Place, London, WC1E 6BT, UK. d.witte@ucl.ac.uk

Diabetologia
|December 25, 2004
PubMed

Insights

Cardiac autonomic neuropathy (CAN) in type 1 diabetes is predicted by age, HbA1c, blood pressure, and complications like retinopathy. Early identification of these risk factors is crucial for managing CAN and improving patient outcomes.

Area of Science:

  • Endocrinology and Diabetology
  • Cardiovascular Medicine
  • Neurology

Background:

  • Cardiac autonomic neuropathy (CAN) significantly increases morbidity and mortality in type 1 diabetes.
  • Risk factors for CAN, beyond glycemic control, require further investigation.

Purpose of the Study:

  • To identify baseline risk factors for the incidence of cardiac autonomic neuropathy (CAN) in type 1 diabetes patients.
  • To establish predictors for CAN development over a 7.3-year follow-up period.

Main Methods:

  • Assessed CAN (loss of heart rate variability or postural hypotension) in 956 type 1 diabetes patients without CAN at baseline.
  • Utilized data from the EURODIAB Prospective Complications Study with a mean follow-up of 7.3 years.

Main Results:

  • 163 participants (17%) developed CAN, with an incidence of 23.4 per 1,000 person-years.
  • Increased risk of CAN was associated with higher age, HbA1c, systolic blood pressure, feeling faint on standing, distal symmetrical polyneuropathy (DSP), and retinopathy at baseline.

Conclusions:

  • Hyperglycemia (HbA1c) remains a key risk factor for CAN in type 1 diabetes.
  • Age, hypertension, DSP, and retinopathy are significant predictors of CAN risk.
  • Further clinical trials are recommended to evaluate intensive antihypertensive treatment's impact on CAN.
Abstract

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