GSTM1 and Patent foramen ovale: BSA, body surface area; SpO2, blood oxygen saturation; ASA class, American Society of Anesthesiologists Physical Status Classification; ASD, atrial septal defect; PDA, patent ductus arteriosus; PFO, patent foramen ovale; PLSVC, persistent left superior vena cava; WCC, white blood cell count; ANC, absolute neutrophil count; ALC, absolute lymphocyte count; AMC, absolute monocyte count; Hb, hemoglobin levels; PLT, platelet counts; TAP, transannular patch; VS, valve-sparing; CPB, cardiopulmonary bypass; ACC, aortic cross-clamp; T min, the minimum temperature; RBC, red blood cells