NCIt definition : An electrocardiographic finding of an atrial rhythm which originates from the sinoatrial
node that is considered normal for the population. There are no extra beats or conduction
abnormalities. (CDISC);
Alternative definition : CDISC: An electrocardiographic finding of an atrial rhythm which originates from the
sinoatrial node that is considered normal for the population. There are no extra beats
or conduction abnormalities.;