premature atrial contraction

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Related to Premature atrial contractions: Premature ventricular contractions

premature atrial contraction

n. Abbr. PAC
An ectopic heartbeat that originates in the atria and precedes a typical atrial contraction.

pre·ma·ture a·tri·al con·trac·tion

(PAC) (prē'mă-chŭr'ā'trē-ăl kŏn-trak'shŭn)
A premature cardiac beat arising from an ectopic atrial focus.
References in periodicals archive ?
Her history of premature atrial contractions may also have increased her risk for atrial fibrillation (Binici et al.
Less common adverse effects include transient or prolonged asystole, varying degrees of AV block, premature ventricular contractions, premature atrial contractions and bradycardia.
Premature supraventricular contractions or premature atrial contractions (PAC).
The different types of SVA are premature atrial contractions (PAC), supraventricular tachycardia (SVT), sick sinus syndrome (SSS), atrial fibrillation (A-fib) and atrial flutter (AFL).