HK1 and hydrops fetalis: ForCAD patients, the median value of urinary hK1-specific amidase activity observed in thepresent study [0.146 μM/(min · mg creatinine)] remained within thevalues previously reported for HF [0.104 μM/(min · mg creatinine)] andhypertensive [0.210 μM/(min · mg creatinine)] patients of our previousstudies6,3.