Premature Junctional Contractions

Rate	normal or accelerated.
P wave	as with junctional rhythm.
QRS	normal
Conduction	P-R interval < .12 secs if P waves are present.
Rhythm	PJC's occur early in the cycle of the baseline rhythm. A full compensatory pause may occur.

PJCs may occur in both healthy and diseased hearts. If they are occasional, they are insignificant. If they are frequent, junctional tachycardia may result.

Treatment is usually not required.