Which rhythm is defined by a rate greater than 100 bpm at the junction?

Which rhythm is defined by a rate greater than 100 bpm at the junction?

• A. Junctional Tachycardia
• B. Accelerated Junctional Rhythm
• C. Regular Rhythm Block
• D. Wenckebach

Answer: (A)

AV junctional rhythms are categorized by where the electrical impulse originates and how fast it runs. When the impulse comes from the AV junction and the rate exceeds 100 beats per minute, the rhythm is called junctional tachycardia. This higher rate is the defining feature, indicating tachycardia from the AV junction. The QRS is typically narrow, and the P waves can be before, during, or after the QRS depending on conduction direction, which helps distinguish it from other supraventricular rhythms. An accelerated junctional rhythm stays within a slower range, roughly 60 to 100 bpm, so it doesn’t meet the criterion of a rate greater than 100. Wenckebach describes a type of AV block with progressively lengthening PR intervals and dropped beats, not a junctional rhythm defined by a high rate. The term regular rhythm block doesn’t correspond to a standard junctional tachycardia description and doesn’t specify a rate above 100.

AV junctional rhythms are categorized by where the electrical impulse originates and how fast it runs. When the impulse comes from the AV junction and the rate exceeds 100 beats per minute, the rhythm is called junctional tachycardia. This higher rate is the defining feature, indicating tachycardia from the AV junction. The QRS is typically narrow, and the P waves can be before, during, or after the QRS depending on conduction direction, which helps distinguish it from other supraventricular rhythms.

An accelerated junctional rhythm stays within a slower range, roughly 60 to 100 bpm, so it doesn’t meet the criterion of a rate greater than 100. Wenckebach describes a type of AV block with progressively lengthening PR intervals and dropped beats, not a junctional rhythm defined by a high rate. The term regular rhythm block doesn’t correspond to a standard junctional tachycardia description and doesn’t specify a rate above 100.