Cardiovascular Responses to Psychological Stress

Psychological stress elicits a coordinated set of cardiovascular adaptations mediated by the autonomic nervous system and neuroendocrine pathways. Acute exposure to a stressor triggers hypothalamo–pituitary–adrenal axis activation, sympathetic outflow and catecholamine release, resulting in tachycardia, elevated blood pressure and peripheral vasoconstriction. Endothelial cells respond to stress hormones by altering nitric oxide bioavailability and promoting a pro-inflammatory milieu. Repeated or chronic stress exposures drive maladaptive shifts in baroreflex sensitivity, compromise vascular compliance and accelerate atherogenesis. Individual differences in stressor predictability, social context and genetic predisposition further modulate these responses. Over the long term, sustained haemodynamic burden and endothelial dysfunction raise the risk of hypertension, coronary heart disease and stroke. Understanding the neurochemical circuits that link emotional processing centres to cardiac control networks is essential to develop targeted interventions that can mitigate the global burden of stress-related cardiovascular disease.

Research from Nature Portfolio

Recent studies have delineated key central mechanisms by which stress alters cardiac function. One investigation demonstrates that endocannabinoid signalling via type 1 receptors in the bed nucleus of the stria terminalis regulates GABAergic projections to the lateral hypothalamus, selectively moderating stress-induced tachycardia without affecting blood pressure or vasoconstrictive responses. This work identifies a discrete limbic–hypothalamic pathway through which emotional stimuli modulate heart rate and highlights endocannabinoid modulation as a potential target for stress-related cardiovascular interventions.

Cardiovascular Responses to Psychological Stress publication trend

The graph below shows the total number of articles in cardiovascular responses to psychological stress across all publications each year (not limited to Nature Index journals).

Technical terms

Hypothalamo–pituitary–adrenal (HPA) axis: The neuroendocrine system that regulates stress hormone release (corticosterone or cortisol) from the adrenal glands.

Baroreflex: A feedback mechanism by which changes in blood pressure are detected by stretch receptors and countered through autonomic adjustments of heart rate and vascular tone.

Endocannabinoid signalling: Neuromodulatory communication mediated by endogenous cannabinoids acting on cannabinoid receptors, influencing stress and autonomic circuits.

GABAergic neurotransmission: Inhibitory signalling in the central nervous system mediated by gamma-aminobutyric acid, crucial for balancing excitation in stress pathways.

Tachycardia: An abnormally rapid heart rate, commonly induced by sympathetic activation during stress.

References

1. Lateral hypothalamus involvement in control of stress response by bed nucleus of the stria terminalis endocannabinoid neurotransmission in male rats. Scientific Reports (2021).
2. Dimethyl Fumarate Prevents the Development of Chronic Social Stress-Induced Hypertension in Borderline Hypertensive Rats. Antioxidants (2024).
3. Emotional Stress and Cardiovascular Complications in Animal Models: A Review of the Influence of Stress Type. Frontiers in Physiology (2016).
4. Involvement of Type 1 Angiontensin II Receptor (AT1) in Cardiovascular Changes Induced by Chronic Emotional Stress: Comparison between Homotypic and Heterotypic Stressors. Frontiers in Pharmacology (2016).