Management of Aspirin and Prasugrel Prior to Elective Coronary Angiography
For elective coronary angiography, continue aspirin throughout the perioperative period and discontinue prasugrel 7 days before the procedure. 1, 2
Aspirin Management
Aspirin should be continued without interruption for patients undergoing elective coronary angiography. 1
The 2017 ESC guidelines explicitly recommend continuing aspirin perioperatively if bleeding risk allows, as the thrombotic risk of discontinuation typically exceeds the modest bleeding risk. 1
Maintain aspirin at a dose of 75-100 mg daily throughout the procedure. 1
Coronary angiography is a low-bleeding-risk procedure where aspirin continuation poses minimal hemorrhagic complications. 3
Prasugrel Management
Discontinue prasugrel 7 days (minimum) before elective coronary angiography. 1, 2
The ACC/AHA 2011 CABG guidelines and the French Working Group on Perioperative Haemostasis both specify a 7-day discontinuation period for prasugrel before elective procedures. 1
The FDA label for prasugrel explicitly states: "When possible, discontinue prasugrel at least 7 days prior to any surgery." 2
This 7-day interval is longer than the 5-day requirement for clopidogrel or ticagrelor because prasugrel has more potent and prolonged platelet inhibition. 1
Rationale for Different Management
The differential approach reflects the distinct bleeding profiles of these agents:
Prasugrel carries higher bleeding risk than clopidogrel. In the TRITON-TIMI-38 trial, patients treated with prasugrel before coronary artery surgery had significantly more major bleeding, platelet transfusions, and surgical re-explorations compared to clopidogrel. 1
Aspirin's bleeding risk is modest and acceptable. Multiple guidelines conclude that aspirin's cardiovascular protective benefits outweigh its minimal increase in procedural bleeding for diagnostic angiography. 1, 3
Critical Timing Considerations
If the patient has a coronary stent placed within the past 12 months, this creates a high-risk scenario:
Do not discontinue prasugrel if the stent was placed less than 1 month ago—postpone elective angiography if at all possible. 3
For stents placed 1-6 weeks ago, urgent multidisciplinary cardiology consultation is mandatory before stopping any antiplatelet agent. 3
For stents placed 6 weeks to 12 months ago, prasugrel may be stopped 7 days before the procedure while continuing aspirin, but only after careful risk-benefit assessment. 3
Common Pitfalls to Avoid
Never discontinue both aspirin and prasugrel simultaneously in patients with recent stent placement (within 12 months), as this dramatically increases stent thrombosis risk, which carries approximately 10% mortality. 3, 4
Do not use heparin or low-molecular-weight heparin as "bridging therapy" when stopping prasugrel—anticoagulants do not prevent arterial or stent thrombosis and actually increase bleeding without providing adequate platelet inhibition. 3, 4
Do not shorten the 7-day prasugrel discontinuation period for elective procedures. The FDA label and multiple guidelines consistently specify 7 days as the minimum safe interval. 1, 2
Post-Procedure Resumption
Resume prasugrel within 24-72 hours after angiography once hemostasis is confirmed. 3
Continue aspirin without interruption throughout the entire perioperative period. 1, 3
If percutaneous coronary intervention (PCI) with stenting is performed during the angiography, prasugrel should be restarted immediately post-procedure with appropriate loading dose per standard dual antiplatelet therapy protocols. 2