Before chemotherapy, there was no significant difference among them in age, body mass index, systolic blood pressure, diastolic blood pressure, heart rate, history of hypertension, history of cardiovascular disease, tumor stage, serum hs-cTnT, LVESV, LVEDV and LVEF (P > 0.05) (Table 1). This evidence concerns the gene TNNT2 and hypertensive disorder.