electrolyte lab test abnormal AE sodium retention AE 钠潴留 WEB: https://answers.yahoo.com/question/index?qid=20100823074826AAcg7WV JX, LW, YH MedDRA: 10041277 an electrolyte lab test abnormal AE that is when the kidneys hold on to more sodium and do not excrete it with the kidneys. This tends to expand the blood volume, which can elevate the blood pressure.