Pathophysiological processes underlying emotional triggering of acute cardiac events

Area of Science:

• Cardiology
• Psychosomatic Medicine
• Hematology

Background:

• Acute negative emotional states, such as anger, stress, or depression, are suspected triggers for acute coronary syndrome (ACS).
• The underlying biological mechanisms, particularly concerning platelet activation and hemodynamic changes, remain unclear.

Purpose of the Study:

• To investigate whether patients with a history of ACS preceded by acute negative emotions exhibit heightened hemodynamic and platelet activation in response to psychophysiological stress.
• To explore potential differences in stress response and recovery between patients who experienced emotional triggers before ACS and those who did not.

Main Methods:

• Study included 34 male patients surviving ACS, assessed an average of 15 months post-event.
• Patients were categorized based on experiencing acute negative emotions (n=14) or not (n=20) within 2 hours before symptom onset.
• Hemodynamic variables and platelet activation (monocyte-platelet, leukocyte-platelet, neutrophil-platelet aggregates) were measured during and after standardized psychophysiological stress tests (color-word interference, public speaking).

Main Results:

• The emotion trigger group showed significantly greater increases in monocyte-platelet, leukocyte-platelet, and neutrophil-platelet aggregates compared to the non-trigger group.
• Monocyte-platelet aggregates remained elevated for 30 minutes post-stress in the emotion trigger group.
• The emotion trigger group exhibited delayed recovery of systolic pressure and cardiac output after stress compared to the non-trigger group.

Conclusions:

• Certain patients with coronary artery disease may be particularly vulnerable to emotional triggers of ACS.
• Heightened platelet activation and impaired hemodynamic recovery following psychological stress appear to be key mechanisms contributing to this susceptibility.