Sinus Bradycardia with PAC
P wave: biphasic, notched, flat, or sharp P wave.
QRS: Narrow
2 PACs in a row - Couple or Paired
3 PACs in a row - Run or Burst; also know as PAT (paroxysmal atrial tachycardia)
Bigeminal - a PAC that occurs every 2nd normal complex
Trigeminal - a PAC that occurs every 3rd normal complex
Quadrigeminal - a PAC that occurs every 4th normal complex
![](https://i.ytimg.com/vi/nDC3puqOjMA/mqdefault.jpg)