SBP: systolic blood pressure; DBP: diastolic blood pressure; CCU: cardiac care unit; AF: atrial fibrillation; CHF: congestive heart failure; CKD: chronic kidney disease; non-STEMI: non-ST segment elevation myocardial infarction; DM: diabetes mellitus; HB: hemoglobin; CR: creatinine; PT: prothrombin time; ACEI/ARB: angiotensin-converting enzyme inhibitors/angiotensin receptor blockers; SOFA: sequential organ failure assessment; CCI: Charlson comorbidity index; PNI: prognostic nutritional index. The gene discussed is F2; the disease is atrial fibrillation.