The Randox Liquid Cardiac Controls Level 1, Level 2, and Level 3 are liquid controls containing BNP, CK MB Mass, Digoxin, D-Dimer, Homocysteine, hsCRP, Myoglobin, NT-ProBNP, Troponin I, and Troponin T. They have been developed for use in the quality control of BNP, CK MB Mass, Digoxin, D-Dimer, Homocysteine, hsCRP, Myoglobin, NT-ProBNP, Troponin I, and Troponin T assays on various clinical chemistry and immunoassay systems. This in vitro diagnostic device is intended for prescription use only.