In junctional tachycardia, the ventricular rate is usually:

In junctional tachycardia, the ventricular rate typically falls between 100 and 200 beats per minute. This condition arises from an ectopic focus within the junctional zone of the heart, where the rate exceeds the normal heart rhythm.

Understanding the normal parameters for heart rates is crucial: rates below 60 bpm indicate bradycardia, while rates of 60 to 100 bpm are considered normal sinus rhythm. Rates above 200 bpm typically suggest a different form of tachycardia, such as ventricular tachycardia or atrial flutter, which are distinct from junctional tachycardia. Thus, the defining characteristic of junctional tachycardia is its specific range that aligns with choice C, clearly situating it in a setting where the heart is firing rapidly but not exceeding 200 bpm.