Figure 2From: Prediction of early postoperative major cardiac events after elective orthopedic surgery: the role of B-type natriuretic peptide, the revised cardiac risk index, and ASA class Box plots of preoperative (Preop.) and postoperative (Postop.) BNP levels in the 14 patients with MACE (red bars) compared with the event-free patients (blue bars). P <0.0007 BNP Preop. vs P <0.0001 Postop.Back to article page