PMID: 8950496Sep 1, 1996Paper

Platelet activation and restenosis after coronary stenting: flow cytometric detection of wound-induced platelet activation

Coronary Artery Disease
J H MarkovitzV Bittner

Abstract

Platelet activation has been implicated in restenosis after percutaneous transluminal coronary angioplasty (PTCA), but previous studies may have been confounded by factors such as elastic recoil and arterial remodelling. Restenosis after coronary stenting is unlikely to be affected by these factors. Forty-nine patients who had stenting for acute or impending closure after PTCA were included in the study. Patients with restenosis (> or = 50% stenosis by angiography) and without restenosis were selected using a case-control design. Restenosis was determined by the caliper method. Patients were tested for platelet activation 1-4 years after their procedure while taking their usual medications (including aspirin). Reliability testing was conducted with 11 healthy subjects. Platelet activation was measured in blood leaving a bleeding-time wound (wound-induced platelet activation), using flow cytometry. Blood was collected from the wound site 1 and 2 min after the incision. Monoclonal antibodies were used to test for activation of glycoprotein (GP) IIb/IIIa (PAC-1), GPIIb/IIIa ligand binding (anti-ligand-induced binding site 1: anti-LIBS-1), and P-selectin expression (AC1.2). Short-term intersample reliability was very good to excell...Continue Reading

Citations

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