quantification of the amount of asymmetrical dimethylarginine in blood. It is a structural isomer of asymmetric dimethyl argigine. It has been reported to be a marker for kidney disease,  often used a predictor of all-cause mortality after ischemic stroke. The trait is symmetrical dimethylarginine measurement (Experimental Factor Ontology entry EFO_0006523). Also known as: SDMA measurement.