Source:http://linkedlifedata.com/resource/umls/id/C0232208
NCI: An electrocardiographic finding in which the pacer of the heart is located in the AV junction, normally presenting with a narrow QRS complex and a rate of 60-100 beats per minute.,NCI: An electrocardiographic finding in which the pacer of the heart is located in the AV junction, normally presenting with a narrow QRS complex and a rate of 60-100 beats per minute. (NCI)