(Circulation. 1999;99:2371-2377.)
© 1999 American Heart Association, Inc.
Clinical Investigation and Reports |
Stroke in Patients With Acute Coronary Syndromes
Incidence and Outcomes in the Platelet Glycoprotein IIb/IIIa in Unstable Angina: Receptor Suppression Using Integrilin Therapy (PURSUIT) Trial
From Duke Clinical Research Institute, Durham, NC (K.W.M., R.A.H., C.B.G., C.G., M.J.A., D.L., J.M.M., L.G.B., C.M.M., R.M.C.); Harbin Clinic, Rome, Ga (M.A.S.); Thorax Center, Erasmus University, Rotterdam, The Netherlands (M.L.S., J.D.); and The Cleveland Clinic Foundation, Cleveland, Ohio (A.M.L., E.J.T.).
Correspondence to Kenneth W. Mahaffey, MD, PO Box 17969, Duke Clinical Research Institute, Duke University Medical Center, Durham, NC 27705. E-mail mahaf002{at}mc.duke.edu
Background—The incidence of stroke in patients with acute coronary syndromes has not been clearly defined because few trials in this patient population have been large enough to provide stable estimates of stroke rates.
Methods and Results—We studied the 10 948 patients with acute coronary syndromes without persistent ST-segment elevation who were randomly assigned to placebo or the platelet glycoprotein IIb/IIIa receptor inhibitor eptifibatide in the Platelet Glycoprotein IIb/IIIa in Unstable Angina: Receptor Suppression Using Integrilin Therapy (PURSUIT) trial to determine stroke rates, stroke types, clinical outcomes in patients with stroke, and independent baseline clinical predictors for nonhemorrhagic stroke. Stroke occurred in 79 (0.7%) patients, with 66 (0.6%) nonhemorrhagic, 6 intracranial hemorrhages, 3 cerebral infarctions with hemorrhagic conversion, and 4 of uncertain cause. There were no differences in stroke rates between patients who received placebo and those assigned high-dose eptifibatide (odds ratios and 95% confidence intervals 0.82 [0.59, 1.14] and 0.70 [0.49, 0.99], respectively). Of the 79 patients with stroke, 17 (22%) died within 30 days, and another 26 (32%) were disabled by hospital discharge or 30 days, whichever came first. Higher heart rate was the most important baseline clinical predictor of nonhemorrhagic stroke, followed by older age, prior anterior myocardial infarction, prior stroke or transient ischemic attack, and diabetes mellitus. These factors were used to develop a simple scoring nomogram that can predict the risk of nonhemorrhagic stroke.
Conclusions—Stroke was an uncommon event in patients with acute coronary syndromes in the PURSUIT trial. These strokes are, however, associated with substantial morbidity and mortality rates. The majority of strokes were of nonhemorrhagic causes. Eptifibatide was not associated with an increase in intracranial hemorrhage, and no significant effect on nonhemorrhagic stroke was observed. We developed a useful nomogram for assigning baseline nonhemorrhagic stroke risk in this patient population.
Key Words: stroke • coronary disease • myocardial infarction • glycoproteins • receptors
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