What is the difference between accelerated junctional and junctional tachycardia?

What is the difference between accelerated junctional and junctional tachycardia?

• A. Accelerated junctional is 60-100 bpm and junctional tachycardia is 100+ bpm
• B. Accelerated junctional has shorter PR interval
• C. They have identical rates
• D. Accelerated junctional is 40-60 bpm

Answer: (A)

The key idea here is how the heart rate defines these rhythms. A junctional rhythm normally runs about 40–60 beats per minute. When the rate climbs into 60–100 bpm, that is called an accelerated junctional rhythm. If the rate goes above 100 bpm, it’s considered junctional tachycardia. So the difference is simply the rate range, with accelerated junctional at 60–100 and junctional tachycardia at over 100. The other options don’t fit because they either misstate the rate ranges or focus on another feature like the PR interval, which isn’t the defining criterion for distinguishing these two rhythms.

The key idea here is how the heart rate defines these rhythms. A junctional rhythm normally runs about 40–60 beats per minute. When the rate climbs into 60–100 bpm, that is called an accelerated junctional rhythm. If the rate goes above 100 bpm, it’s considered junctional tachycardia. So the difference is simply the rate range, with accelerated junctional at 60–100 and junctional tachycardia at over 100. The other options don’t fit because they either misstate the rate ranges or focus on another feature like the PR interval, which isn’t the defining criterion for distinguishing these two rhythms.