Abstract
Background: Intravenous anticoagulants are the cornerstone of percutaneous coronary intervention (PCI), reducing thrombotic complications during and after the procedure. However, their use requires a careful balance between antithrombotic efficacy and bleeding risk.
Methods: This review summarizes and analyzes recent evidence and compares recommendations from international guidelines (ACC/AHA 2025, ESC 2023), focusing on the selection, dosing, and indications of anticoagulants used in PCI, including UFH, low-molecular-weight heparins, bivalirudin, fondaparinux, and enoxaparin.
Results: Anticoagulation is recommended for all patients with acute coronary syndromes, with UFH or bivalirudin as preferred options in both STEMI and NSTE-ACS. In patients with atrial fibrillation or on chronic anticoagulation therapy, drug selection and timing of discontinuation/reinitiation are critical to minimize both bleeding and thrombotic risks. New-onset atrial fibrillation after PCI increases the risk of mortality and stroke, requiring appropriate anticoagulation strategies.
Conclusions: No single anticoagulant is optimal for all PCI patients. Selection should be individualized based on clinical context, bleeding and thrombotic risks, and renal function.