What is junctional bigeminy characterized by?

What is junctional bigeminy characterized by?

• A. A PJB after every normal cycle
• B. A PJB after every two normal cycles
• C. A normal cycle following each PJB
• D. A PJB following every three normal cycles

Answer: (A)

Junctional bigeminy is characterized by the occurrence of a premature junctional beat (PJB) following each normal heartbeat. In this pattern, there is an alternating sequence of a normal beat followed by a PJB, creating a repeating rhythm. This means that for every regular sinus beat, a PJB occurs immediately afterward, leading to the characteristic "bigeminal" pattern of one normal heartbeat and one abnormal heartbeat in quick succession. Understanding this concept is crucial in identifying and differentiating junctional bigeminy from other arrhythmias, as the predictable nature of this pattern helps in effective EKG interpretation.