Platelet release in coronary heart disease: Effect of antiplatelet drugs and coronary artery bypass graft

Hamid Al-Mondhiry, William S. Pierce, John L. Pennock

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

We report serial measurements of in vivo platelet release products β-thromboglobulin and platelet factor 4 in 38 patients with coronary artery disease who underwent coronary artery bypass graft surgery. All patients were given dipyridamole preoperatively and both dipyridamole and aspirin postoperatively. Assays of plasma β-thromboglobulin and platelet factor 4 were performed immediately before surgery, at discharge, and at follow-up visits. At initial evaluation, 22 patients with prior myocardial infarction had significantly elevated plasma β-thromboglobulin levels (p = 0.0004). In the preoperative period, the use of dipyridamole caused some reduction of plasma β-thromboglobulin and platelet factor 4, but the difference was not statistically significant. Six to 12 days after surgery, all patients had plasma β-thromboglobulin concentrations higher than the preoperative levels despite the continued ingestion of dipyridamole and aspirin. At a follow-up visit, 30 to 133 days after surgery, only patients with previous myocardial infarction had β-thromboglobulin levels higher than their preoperative values. However, compared with controls, all patients who underwent coronary artery bypass graft surgery had elevated plasma levels of β-thromboglobulin in both the early and late postoperative periods. In this group of patients, successful revascularization of the myocardium, as indicated by relief of symptoms, did not completely inhibit platelet activation.

Original languageEnglish (US)
Pages (from-to)397-402
Number of pages6
JournalThe Journal of Laboratory and Clinical Medicine
Volume105
Issue number3
StatePublished - Mar 1985

All Science Journal Classification (ASJC) codes

  • Pathology and Forensic Medicine

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