The use of preoperative aspirin in cardiac surgery: A systematic review and meta-analysis

http://onlinelibrary.wiley.com/doi/10.1111/jocs.13250/abstract

Aspirin is of benefit to patients following CABG.
Continuation or administration of preoperative aspirin before CABG or any cardiac surgical procedure remains controversial.

12 randomized controlled trials and 28 observational studies

Result
1
The use of preoperative aspirin in patients undergoing CABG at any dose is associated with reduced early mortality as well as a reduced incidence of postoperative acute kidney injury.
2
Low-dose aspirin (≤160 mg/d) is associated with a decreased incidence of perioperative myocardial infarction (MI).
3
Administration of preoperative aspirin at any dose in patients undergoing cardiac surgery increases postoperative bleeding. It did not increase the rates of surgical re-exploration due to excessive postoperative bleeding nor did it increase the rates of packed red blood cell transfusions (PRBC).

Bayaspirin　１T = 100mg