Erratic Serum Creatinine Concentrations in a Cardiac Patient

A 68-year-old man with a history of ischemic cardiomyopathy presented with decompensated heart failure and acute kidney injury. He was admitted to the coronary care unit for dopamine-assisted diuresis via a central line. Serum creatinine testing was performed using an enzymatic creatininase method (Roche cobas c701; Roche Diagnostics), revealing erratic creatinine concentrations …