Association between clinical depression and endothelial function measured by forearm hyperemic reactivity

Area of Science:

• Cardiology
• Psychiatry
• Vascular Biology

Background:

• Major depressive disorder (MDD) is linked to impaired endothelial function (EF), an early marker of coronary heart disease (CHD).
• Previous studies have not assessed the association between MDD and EF in patients with or at risk for CHD.

Purpose of the Study:

• To investigate the relationship between clinically significant depression (MDD and minor depressive disorder [MiDD]) and EF in patients undergoing myocardial perfusion imaging.
• To determine if EF is impaired in patients with depression, regardless of their CHD status.

Main Methods:

• 323 patients with or at risk for CHD were assessed for depression using the Primary Care Evaluation of Mental Disorders interview.
• Endothelial function (EF) was measured using forearm hyperemic reactivity (FHR), assessed via a dynamic nuclear imaging technique measuring relative uptake ratio (RUR) of blood flow.

Main Results:

• Patients with MDD and MiDD exhibited significantly lower RURs, indicating poorer EF compared to patients without depression (p < .01).
• The association between depression and impaired EF was observed irrespective of coronary heart disease (CHD) status.
• Results remained significant after adjusting for various sociodemographic, medical, biochemical, and physiological covariates.

Conclusions:

• Clinical depression is associated with worse endothelial function (EF) in patients with or at risk for CHD.
• These findings suggest that impaired EF may be a mechanism linking depression to adverse CHD outcomes.
• The study highlights the importance of considering endothelial function in patients with depression and cardiovascular risk.