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Medical Definition of Nodus sinuatrialis echo
1. A postectopic sinus beat occurring earlier than would be expected from the preceding sinus node discharge interval; i.e., 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. (05 Mar 2000)
Lexicographical Neighbors of Nodus Sinuatrialis Echo
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