Answer 23

23.  Choice B is the correct answer.  A PJC originates from an ectopic focus in the AV junction which fires before the normal cycle.  PJC's usually are inverted P waves occurring before, during, or immediately after the QRS complex.  Premature Ventricular Contractions show a widened QRS complex occurring very early before a P wave.  Premature atrial contractions are P waves that occur much normal than usual on an EKG