premature atrial contraction

(redirected from Atrial premature complexes)
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premature atrial contraction

n. Abbr. PAC
An ectopic heartbeat that originates in the atria and precedes a typical atrial contraction.
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Atrial premature complexes are common with hypokalemia, and atrial fibrillation may occur.
A-V junctional premature complexes were treated with in the same manner as atrial premature complexes.
Table: Electrocardiographic abnormalities in pulmonary embolism Rhythm Sinus tachycardia Atrial premature complexes Atrial flutter Atrial fibrillation Right ventricular premature complexes Ventricular fibrillation Sinus bradycardia or asystole (rarely) P waves Rightward axis ([greater than or equal to] 75[degrees]) Tall (>2.

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