Figure 2 The intraoperative effect of dexmedetomidine on heart rate and blood pressure, and postoperative N-terminal pro-B-type natriuretic peptide. (A) Maximum intraoperative heart rate (HRmax) decreased in the dexmedetomidine group. (B) Maximum intraoperative diastolic pressure (DIAmax) significantly decreased in the dexmedetomidine group. (C) Dexmedetomidine did not impact the systolic pressure before or during the operation. (D) Dexmedetomidine increased the postoperative N-terminal pro-B-type natriuretic peptide levels and decreased the postoperative cTnI levels. * P<0.05; ** P<0.01.