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RDW may be useful in risk stratification of patients selected for ICD implantation. But larger prospective randomized trials are needed.

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Objective Activated clotting time (ACT)-based heparin dosing during percutaneous intervention (PCI) is recommended by Society guidelines. However, the relationship between ACT and outcome in the setting of elective PCI has not been sufficiently studied. We sought to evaluate the in-hospital outcome of patients undergoing elective PCI while receiving fixed-dose heparin without ACT measurement versus those with ACT-guided management. Methods This retrospective study included consecutive patients undergoing elective PCI in a single-center between 11/2015 and 12/2018. Patients were divided into two groups, depending on whether ACT was measured. Heparin-only anticoagulation and non-femoral procedures were allowed. Patient demographics, procedural data and in-hospital outcomes were collected. The primary outcome was in-hospital major adverse cardiovascular events (MACE), secondary (safety) outcomes were in-hospital definite stent thrombosis, Bleeding Academic Research Consortium bleeding, access-related complications (any) as well as peri-procedural complications. Results In total, 500 procedures were included in the study, 151 ACT and 349 fixed-dose. Patient demographics and medical history in both groups were well balanced, but those having ACTs were younger (63.2 ± 10.9 vs. 66.5 ± 11.3; P = 0.003) and less likely to have a history of coronary artery disease (74 vs. 82%; P = 0.032) or kidney failure. Procedural data were similar; however, total heparin dose and procedure length were higher in the ACT group (6232 ± 1388 vs.5032 ± 417 units; P < 0.001; 40.1 ± 14.0 vs. 30.3 ± 12.7 min; P < 0.001). Primary and secondary outcome events were rare and similar (MACE 1.1 vs. 1.3%; P = 0.86). Conclusions A fixed-dose heparin injection (5000 IU) approach for elective PCI while omitting ACT offers slightly shortened procedural time and similar in-hospital safety profile.