J Am Heart Assoc
Aged; Aspirin; Biomarkers; Cause of Death; Coronary Artery Bypass; Female; Humans; Kaplan-Meier Estimate; Male; Middle Aged; Multivariate Analysis; Myocardial Infarction; Platelet Aggregation Inhibitors; Predictive Value of Tests; Proportional Hazards Models; Risk Factors; Stroke; Thromboxane A2; Thromboxane B2; Time Factors; Treatment Outcome; Urinalysis
BACKGROUND: Systemic thromboxane generation, not suppressible by standard aspirin therapy and likely arising from nonplatelet sources, increases the risk of atherothrombosis and death in patients with cardiovascular disease. In the RIGOR (Reduction in Graft Occlusion Rates) study, greater nonplatelet thromboxane generation occurred early compared with late after coronary artery bypass graft surgery, although only the latter correlated with graft failure. We hypothesize that a similar differential association exists between nonplatelet thromboxane generation and long-term clinical outcome.
METHODS AND RESULTS: Five-year outcome data were analyzed for 290 RIGOR subjects taking aspirin with suppressed platelet thromboxane generation. Multivariable modeling was performed to define the relative predictive value of the urine thromboxane metabolite, 11-dehydrothromboxane B
CONCLUSIONS: Long-term nonplatelet thromboxane generation after coronary artery bypass graft surgery is a novel risk factor for 5-year adverse outcome, including death. In contrast, nonplatelet thromboxane generation in the early postoperative period appears to be driven predominantly by inflammation and did not independently predict long-term clinical outcome.
Center for Cardiovascular Analytics, Research + Data Science (CARDS)
Kakouros, Nikolaos; Gluckman, Tyler J; Conte, John V; Kickler, Thomas S; Laws, Katherine; Barton, Bruce A; and Rade, Jeffrey J, "Differential Impact of Serial Measurement of Nonplatelet Thromboxane Generation on Long-Term Outcome After Cardiac Surgery." (2017). Articles, Abstracts, and Reports. 3457.