Atrial premature complexes (APCs) are a type of irregular heartbeat that originates in the atria. APCs cause premature heartbeats to occur. Depending on the cause, people may not require treatment.

SAN FRANCISCO, CA — Knowing the number of hourly premature atrial contractions (PACs) a patient has is as good as the Framingham atrial fibrillation (AF) risk algorithm in predicting five- to 15-year ...

let's go over premature atrial contractions so these are sometimes referred to as pac's and they're early contractions that originate from a focal point in the Atria rather than the SA node and this ...