premature atrial contraction


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Related to premature atrial contraction: Premature ventricular contractions

premature atrial contraction

n. Abbr. PAC
An ectopic heartbeat that originates in the atria and precedes a typical atrial contraction.
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References in periodicals archive ?
Premature ventricular complexes were the most common abnormal finding during the study followed by premature atrial contractions.
His ECG showed frequent premature atrial contractions [PAC] and left atrial enlargement.
Of the 15 patients whose ECGs showed arrhythmias (9 of whom were not aware that they had arrhythmias), 8 displayed premature ventricular contractions (PVCs), 3 had premature atrial contractions (PACs), 2 had atrial fibrillation, 1 had missed beats and 1 had a bundle branch block.
Researchers at the University of California, San Francisco, reported this month in Annals of Internal Medicine that people with a high rate of premature atrial contractions, which can be detected by a Holter monitor worn for 24 hours, face a significantly increased risk of developing A-fib.
any kind of atrioventricular or intraventricular conditions or blocks such as complete left or right bundle branch block, AV node block, QTc or PR prolongation, premature atrial contractions or other atrial arrhythmia, sustained ventricular arrhythmia, two premature ventricular contractions in a row, ST elevation consistent with ischemia)