Abstract 291: Platelet Function Monitoring After Percutaneous Coronary Intervention: Updated Meta-analysis of Randomized Trials

Background: The need to balance bleeding and clotting risks after percutaneous coronary intervention (PCI) has led to interest in platelet function monitoring as a strategy to improve post-PCI outcomes. The prognostic value of platelet function testing in monitoring response to antiplatelet therapy after PCI remains unclear. Prior studies have been inconclusive. We sought to conduct an updated meta-analysis to address this gap in knowledge. Methods: We conducted a systematic search of EMBASE, PUBMED and the Cochrane libraries for studies since inception to December 2016 on platelet function monitoring. Our search yielded 203 studies, out of which 83 were extracted for full-text review. Only 3 studies met inclusion criteria. We pooled odds ratios using random-effects statistics, Mantel-Haenszel method. I2 and Chi- squared statistic was used to evaluate for heterogeneity. Publication bias was assessed using the funnel plot. Primary outcome was major adverse cardiovascular events (MACE). This was defined in the studies as a composite of cardiovascular death, myocardial infarction, stroke, stent thrombosis, and bleeding complications. Results: The 3 randomized controlled trials that were analyzed involved 3701 patients. There were 550 MACE (29.76%) in the platelet function monitored group compared with 514 (27.74%) in the control. MACE (Figure 1) was not significantly higher for the platelet function monitored group during follow-up compared with control (pooled Odds Ratio:1.11 [95% CI: 0.96-1.28], p = 0.15). Tests for heterogeneity were not significant, with I2 of 0%, Chi2 = 1.52 (p = 0.47); and small study bias was absent on visual inspection of the funnel plot. Conclusions: Platelet function monitoring continues to be used in practice. Results from this meta-analysis show no benefit of platelet function monitoring compared with conventional strategy with regards to MACE after PCI. Future research is needed to further evaluate this finding.