TNNT2 and chronic kidney disease: Some studies have shown that up to 43% of CKD patients can have baseline values above the conventional 99% URL, increasing to up to 68% in those with eGFR < 30 mL/min/1.73 m2 [35], and larger studies would be required to provide guidelines on how best to use hs-cTnT for the identification of ACS in CKD patients.