Effect of Peri-Interventional Blood Loss on In-Stent Thrombosis After Percutaneous Coronary Intervention in Patients with Acute Myocardial Infarction.

This paper evaluates the effect of blood loss on in-stent stenosis after percutaneous coronary intervention (PCI) in patients with acute myocardial infarction (AMI). Nine hundred and ninety-seven patients who underwent PCI for AMI as well as follow-up coronary angiography at 6-12 months from two centers were categorized into three groups based on peri-interventional blood loss at the primary intervention (mild, <1 mmol/L moderate, 1-2 mmol/L; severe > 2 mmol/L). The endpoint was to evaluate the incidence and severity of in-stent stenosis at follow-up angiography and the revascularization rate. The incidence of in-stent stenosis and revascularization in mild, moderate, and severe groups was 19.3%, 33.1%, and 61.1%, respectively (p = 0.001), with HR: 1.35 (95% CI; 1.10-1.65), p < 0.001. Peri-interventional blood loss was associated with a higher incidence of in-stent stenosis and revascularization 6-12 months after successful PCI in patients with AMI.