Source:http://linkedlifedata.com/resource/umls/id/C0039240
MSH: A generic expression for any tachycardia that originates above the BUNDLE OF HIS.,NCI: A generic expression for any tachycardia that originates in the atria or the atrioventricular node. (NCI),NCI: A disorder characterized by a dysrhythmia with a heart rate greater than 100 beats per minute that originates above the ventricles.,NCI: Tachyarrhythmia originating either from the atria or the atrioventricular node.