SYN: sinuatrial.
* * *
si·no·atri·al .sī-nō-'ā-trē-əl also si·nu·atri·al .sī-n(y)ü- adj of, involving, or being the sinoatrial node <\sinoatrial block>
* * *
si·no·atri·al (si″no-aґtre-əl) pertaining to the sinus venosus (sinus of venae cavae) and the atrium of the heart; called also sinuatrial.Medical dictionary. 2011.