Intracoronary thrombus and platelet glycoprotein IIb/IIIa receptor blockade with tirofiban in unstable angina or non-Q-wave myocardial infarction. Angiographic results from the PRISM-PLUS trial (Platelet receptor inhibition for ischemic syndrome management in patients limited by unstable signs and symptoms). PRISM-PLUS Investigators.
Circulation
; 100(15): 1609-15, 1999 Oct 12.
Article
en En
| MEDLINE
| ID: mdl-10517731
BACKGROUND: The present study describes the effects of tirofiban, a nonpeptide platelet glycoprotein (GP) IIb/IIIa receptor blocker, on the characteristics of culprit lesions in patients with unstable angina (UA) or non-Q-wave myocardial infarction (NQWMI). METHODS AND RESULTS: Of 1915 patients enrolled in PRISM-PLUS, 1491 had a readable film obtained a median of 65 hours after randomization. A core laboratory examined the culprit lesions for intracoronary thrombus burden (primary end point) and for TIMI flow grade distribution and severity of the obstruction and of underlying coronary artery disease (secondary end points). The combination of tirofiban plus heparin compared with heparin alone significantly reduced the intracoronary thrombus burden of the culprit lesions (OR=0.77, P=0.022), improved the perfusion grade (OR=0.65, P=0.002), and decreased the severity of the obstruction (P=0.037), but it did not influence the severity of the underlying plaque. Persistence of a thrombus in 45% of patients was associated with a 2.4-fold increase in the odds of death at 30 days (P=0.005) and a 2-fold increase in the odds of myocardial infarction (P=0.002). CONCLUSIONS: The addition of tirofiban to heparin reduced the thrombus burden of the culprit lesion and improved distal perfusion in patients with UA or NQWMI, which supports the clinical benefit observed with the combination treatment.
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Colección:
01-internacional
Base de datos:
MEDLINE
Contexto en salud:
6_ODS3_enfermedades_notrasmisibles
Problema de salud:
6_cardiovascular_diseases
/
6_ischemic_heart_disease
Asunto principal:
Arteriosclerosis
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Tirosina
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Enfermedad de la Arteria Coronaria
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Trombosis Coronaria
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Inhibidores de Agregación Plaquetaria
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Heparina
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Complejo GPIIb-IIIa de Glicoproteína Plaquetaria
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Fibrinolíticos
/
Angina Inestable
/
Infarto del Miocardio
Tipo de estudio:
Clinical_trials
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Diagnostic_studies
/
Etiology_studies
Límite:
Aged
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Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Circulation
Año:
1999
Tipo del documento:
Article
País de afiliación:
Estados Unidos