Which characteristic is NOT true for Junctional Tachycardia?

Junctional Tachycardia is characterized by a heart rate that typically exceeds 100 beats per minute, which is consistent with option A. The presence of inverted P waves is also a common feature in junctional rhythms, as the impulse originates from the area around the AV junction instead of the atria, supporting option B. Additionally, junctional tachycardia usually presents with a regular QRS complex, as indicated in option C.

The normal PR interval, however, is not a characteristic associated with Junctional Tachycardia. In this condition, the PR interval may be short or absent due to the proximity of the ectopic pacemaker to the AV node, leading to less time between atrial depolarization and ventricular depolarization. Thus, recognizing that a normal PR interval is not typical for Junctional Tachycardia clarifies why this characteristic is not true for the condition.