Pathophysiological processes underlying emotional triggering of acute cardiac events

Proceedings of the National Academy of Sciences of the United States of America
Philip C StrikeAndrew Steptoe

Abstract

Acute negative emotional states may act as triggers of acute coronary syndrome (ACS), but the biological mechanisms involved are not known. Heightened platelet activation and hemodynamic shear stress provoked by acute stress may contribute. Here we investigated whether patients whose ACS had been preceded by acute anger, stress, or depression would show heightened hemodynamic and platelet activation in response to psychophysiological stress testing. We studied 34 male patients an average of 15 months after they had survived a documented ACS. According to an interview conducted within 5 days of hospital admission, 14 men had experienced acute negative emotion in the 2 h before symptom onset, and 20 men had not experienced any negative emotion. Hemodynamic variables and platelet activation were monitored during performance of challenging color-word interference and public speaking tasks and over a 2-h poststress recovery period. The emotion trigger group showed significantly greater increases in monocyte-platelet, leukocyte-platelet, and neutrophil-platelet aggregate responses to stress than the nontrigger group, after adjusting for age, body mass, smoking status, and medication. Monocyte-platelet aggregates remained elevated for...Continue Reading

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