This is an unblinded, randomized study to identify proteomic inflammatory biomarkers to determine if there are differences in the biomarkers in patients who are treated using the CorMatrix ECM implant to close the pericardium and the patients whose pericardium is left open (the current standard of care). The study will be located at the Inova Heart and Vascular Institute (IHVI). The CorMatrix ECM will be implanted during the CABG surgical procedure in the IHVI cardiovascular operating rooms (CVOR).