SA node

(redirected from sinuatrial node)
Also found in: Thesaurus, Medical, Encyclopedia.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.SA node - a specialized bit of heart tissue that controls the heartbeat
cardiac muscle, heart muscle - the muscle tissue of the heart; adapted to continued rhythmic contraction
References in periodicals archive ?
The cardiac electrical vector is generated in the right atrium of the sinuatrial node (SA) and transmitted as a vector to the entire heart muscle.