A junctional tachycardia is defined by a rate above which value?

• A. 60-100 bpm
• B. 100+ bpm
• C. 40-60 bpm
• D. 80-100 bpm

Answer: (B)

Junctional tachycardia is a fast rhythm that starts from the AV junction. The AV junction can pace the heart at different speeds: a normal junctional rhythm runs about 40–60 beats per minute, and an accelerated junctional rhythm runs roughly 60–100. When the rate climbs above 100 beats per minute, it’s classified as junctional tachycardia. That threshold—above 100 bpm—defines the tachycardia form from a junctional origin. In this rhythm, you typically see a narrow QRS, and the P waves may be before, within, or after the QRS depending on how atrial conduction is affected. The ranges of 60–100 or 40–60 bpm describe non-tachycardic junctional rhythms, and 80–100 bpm is still below the tachycardia threshold.