Skip to Content
Medical Term:

nodus sinuatrialis echo


a postectopic sinus beat occurring earlier than would be expected from the preceding sinus node discharge interval; the interval following a premature beat of supraventricular origin is less than the ordinary cycle length between sinus beats, whereas ordinarily the interval would be expected to exceed cycle length.

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.