Mechanistic Pathways Linking Posttraumatic Stress Disorder, Sleep Dysregulation, and Cardiovascular Disease: An Integrative Review

Emerging longitudinal studies establish posttraumatic stress disorder (PTSD) as a significant predictor of cardiovascular disease (CVD). The association is determined by a complex interplay of physiological and behavioral mechanisms. Dysregulation of the hypothalamic-pituitary-adrenal (HPA) axis, autonomic nervous system dysfunction with chronic systemic inflammation are key contributors. Behavioral factors like physical inactivity, smoking, and poor dietary habits further elevate CVD risk. The review highlights that sleep disturbances as a critical, modifiable risk factor linking PTSD and CVD. Sleep dysregulation is a hallmark symptom of PTSD and a well-established risk factor for CVD. Exposure to trauma often leads to persistent sleep problems, including insomnia, nightmares, and sleep fragmentation, these disturbances have direct Cardiotoxic effects like increased sympathetic activation, endothelial dysfunction, and elevated inflammation. Although, even with clear connections, research examining sleep as a mediator in the PTSD-CVD relationship remains limited. Addressing these gaps is essential for understanding the internal mechanisms and developing targeted interventions. Sleep-focused interventions could potentially mitigate CVD risk in trauma exposed individuals with PTSD. Furthermore, integrating sleep assessment into routine PTSD care could improve risk stratification. Behavioral medicine models should prioritize sleep health as a modifiable target for CVD prevention, by addressing sleep disturbances in PTSD populations and advanced precision-based strategies to reduce CVD risk. This approach will not only enhance our understanding of the PTSD-CVD link but will also offer practical solutions for improving long-term health outcomes in trauma survivors.