Study subjects 707 patients electively scheduled for aortic valve, coronary revascularization surgery (CABG) or a combination of the two (CABG/AVR) will be recruited and enrolled to receive SGB at the time of surgery. Patients will be introduced to the study by their surgical team and only those providing informed consent to participate will be enrolled. The informed consent document (attached) clearly states that SGB is not currently standard of care.