People in the two genotyping stages were generally comparable for BMI, medical history of hypertension, diabetes, COPD, hyperlipidemia, hemodialysis, and preoperative medications of ACEI/ARB, calcium channel blocker, β-blocker, statins, and postoperative medications of HMG-CoA reductase inhibitor and β-blocker discontinued. The gene discussed is HMGCR; the disease is hypertensive disorder.