Source:http://linkedlifedata.com/resource/umls/id/C0085610
NCI: A heart rate of less than 60 beats per minute, with its origin in the sinus node. (NCI),NCI: A disorder characterized by a dysrhythmia with a heart rate less than 60 beats per minute that originates in the sinus node.,NCI: A heart rate of less than 60 beats per minute, with its origin in the sinus node.