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Differences in heart rate variability between depressed and non-depressed elderly
Koen G van der Kooy1, Hein P J van Hout, Harm W J van Marwijk
1Institute for Research in Extramural Medicine, VU University Medical Center, Amsterdam, The Netherlands.
International Journal of Geriatric Psychiatry
|January 18, 2006
Summary
Older patients with Major Depressive Disorder (MDD) exhibit lower heart rate variability (HRV), indicating impaired cardiac autonomic function. This finding suggests a link between depression and cardiovascular health risks.
Area of Science:
- Cardiology
- Psychiatry
- Geriatrics
Background:
- Heart rate variability (HRV) reflects cardiac autonomic nervous system function.
- Major Depressive Disorder (MDD) is prevalent in older primary care populations.
- Reduced HRV is associated with increased cardiovascular risk.
Purpose of the Study:
- To investigate the relationship between MDD and HRV in older adults.
- To compare HRV in elderly patients with and without MDD.
Main Methods:
- Cross-sectional study comparing 136 elderly MDD patients with 136 matched controls.
- Depression diagnosed using DSM-IV criteria via PRIME-MD.
- HRV measured via electrocardiogram (ECG) during a 5-minute resting period.
Main Results:
- MDD patients demonstrated a statistically significant decrease in HRV compared to controls.
- Multivariate analyses confirmed the association between MDD and reduced HRV.
Conclusions:
- Older primary care patients with MDD have significantly reduced HRV.
- This reduced HRV may contribute to depression being a risk factor for cardiovascular disease and mortality.