REN and cardiovascular disorder: Furthermore, hepatic rSO2 was significantly positively correlated with body mass index (BMI), mean BP, interdialytic weight gain, Hb levels, the serum creatinine concentration, the serum albumin concentration, the colloid osmotic pressure, and the use of renin-angiotensin-aldosterone system (RAS) inhibitors and calcium channel blockers and negatively correlated with age, a history of cardiovascular disease, the aspartate aminotransferase level, and Ln-CRP levels.