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nodus sinuatrialis echo

 

Definition: 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.

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