Continuous ST-segment monitoring for detection of is- chemia may be considered in the early postoperative period after CABG.613,690,695 698 (Level of Evidence: B) 4.10.2. Pulmonary Artery Catheterization: Recommendations Class I 1. Placement of a pulmonary artery catheter (PAC) is indicated, preferably before the induction of anes- thesia or surgical incision, in patients in cardiogenic shock undergoing CABG. (Level of Evidence: C) Class IIa 1. Placement of a PAC can be useful in the intraoperative or early postoperative period in patients with acute hemo- dynamic instability.699 704 (Level of Evidence: B) Class IIb 1. Placement of a PAC may be reasonable in clinically stable patients undergoing CABG after consider- ation of baseline patient risk, the planned surgical procedure, and the practice setting.699 704 (Level of Evidence: B) 4.10.3. Central Nervous System Monitoring: Recommendations Class IIb 1. The effectiveness of intraoperative monitoring of the processed electroencephalogram to reduce the pos- sibility of adverse recall of clinical events or for detection of cerebral hypoperfusion in CABG pa- tients is uncertain.705 707 (Level of Evidence: B) 2. The effectiveness of routine use of intraoperative or early postoperative monitoring of cerebral oxygen saturation via near-infrared spectroscopy to detect cerebral hypoperfusion in patients undergoing CABG is uncertain.708 710 (Level of Evidence: B) See Online Data Supplement 30 for additional data on central nervous system monitoring. Requirements for basic perioperative monitoring in pa- tients undergoing CABG, including heart rate, blood pres- sure, peripheral oxygen saturation, and body temperature, are well accepted. 