Platelet activation by emotional stress in patients with coronary artery disease.

Abstract:

:We studied the effects of experimentally induced emotional stress (mental arithmetic) on different hemodynamic parameters, catecholamine levels, and serum and platelet function tests in 25 postinfarction patients and in 10 apparently healthy, age-matched control subjects. Mental stress (10 minutes) induced significant increments in heart rate, systolic blood pressure, diastolic blood pressure, double product, and cardiac output, indicating a sympatho-adrenal stimulation that was confirmed by a significant increase in serum epinephrine and norepinephrine levels. All of the effects disappeared at minute 10 of recovery. Concomitantly, the test produced a significant increase in platelet aggregation (induced by 3 microM ADP or 1 microgram/ml collagen), the formation of circulating platelet aggregates, and an increase in thromboxane B2 levels in plasma and serum. These effects were also rapidly reversible. Similar activation of hemodynamic parameters and a similar but less evident increase in platelet function by emotional stress were observed in control subjects. A possible artifact due to factitious platelet activation by catheter sampling was excluded with experiments in which a 40-minute rest was introduced after the baseline period and before mental stress; platelet activation did not occur during baseline or rest periods, only after emotional stress. Furthermore, the antiplatelet drug dipyridamole reduced the stress-induced formation of platelet aggregates in postinfarction patients. These results demonstrate the existence of a direct link between emotional stress and platelet function and offer an explanation of one of the mechanisms through which mental stress may be involved in the development of coronary artery disease.

journal_name

Circulation

journal_title

Circulation

authors

Grignani G,Soffiantino F,Zucchella M,Pacchiarini L,Tacconi F,Bonomi E,Pastoris A,Sbaffi A,Fratino P,Tavazzi L

subject

Has Abstract

pub_date

1991-04-01 00:00:00

pages

II128-36

issue

4 Suppl

eissn

0009-7322

issn

1524-4539

journal_volume

83

pub_type

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