Platelets and coronary heart disease: potential psychophysiologic mechanisms
Related Experiment Video
Updated: Oct 20, 2026
Procoagulant Platelet Characterization by Measuring Phosphatidylserine Exposure and Microvesicle Release from Human Purified Platelets
Published on: November 29, 2024
1Department of Psychiatry, University of Pittsburgh, PA 15213.
Insights
Psychological stress may increase platelet reactivity, a key factor in blood clot formation. This heightened platelet activity is a potential mechanism linking emotional stress to acute coronary events like heart attacks.
Area of Science:
- Cardiology
- Psychophysiology
- Hematology
Background:
- Coronary heart disease (CHD) risk is linked to psychophysiological factors, but mechanisms are underexplored.
- Thrombosis, driven by platelet activation, precipitates acute coronary events.
- Platelet inhibition is a proven strategy for preventing coronary events.
Purpose of the Study:
- To review platelet physiology and pathophysiology.
- To discuss platelet function testing and its clinical role in atherosclerosis and acute coronary events.
- To propose platelet reactivity to psychological stress as a major mechanism in coronary events.
Main Methods:
- Literature review of platelet physiology, pathophysiology, and activation.
- Discussion of platelet function testing methodologies.
- Analysis of existing research on stress and platelet activity.
Main Results:
- Platelet activation is a critical component of arterial thrombosis and acute coronary events.
- Epinephrine and shear stress are significant clinical platelet activators.
- Existing literature supports the hypothesis that emotional stress increases platelet activity.
Conclusions:
- Platelet reactivity to psychological stress is a plausible and significant mechanism contributing to coronary events.
- Further research is needed to fully elucidate the link between emotional stress, platelet activity, and cardiovascular risk.
Abstract:
Although there has been extensive research attempting to identify psychophysiologic mechanisms linking psychological events and behavior patterns with risk for coronary heart disease, these are important potential mechanisms that remain largely unexplored. One of these mechanisms is thrombosis, which is widely recognized as the precipitant of acute coronary events (myocardial infarction and sudden ischemic death). A major element in arterial thrombosis is the platelet, and platelet inhibition has been shown to be effective in preventing coronary events. In the present paper, platelet physiology and pathophysiology are reviewed. Platelet function testing and the clinical role of platelet activation in atherosclerosis and acute coronary events are also discussed. Because epinephrine and possibly shear stress are clinically important activators of platelets, it is proposed that platelet reactivity to psychological stress may be a major mechanism in coronary events. The literature to date supports the hypothesis that platelet activity is increased by emotional stress. Suggestions are made for future research in this area.
Related Concept Videos
01:20Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors
Prostaglandin synthesis inhibitors, exemplified by the widely known aspirin, wield their power by irreversibly acetylating...
01:22Formation of the Platelet Plug
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
01:30Coronary Artery Disease I: Introduction
01:26Coronary Artery Disease II: Pathophysiology
01:19Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations
01:27Psychoneuroimmunology: Cardiovascular Disease
A key area of focus in PNI is the relationship between stress and coronary...