What does junctional trigeminy look like on an EKG?

What does junctional trigeminy look like on an EKG?

• A. A run of PJB following each normal cycle
• B. A run of a PJB following 2 normal cycles
• C. Normal cycles only
• D. Only PJBs

Answer: (B)

Junctional trigeminy is characterized by a specific pattern where there is a grouping of normal sinus beats followed by a junctional premature beat (PJB). In this pattern, after two normal heartbeats (which are typically sinus beats), a PJB occurs, and this sequence continues, resulting in a repetitive cycle.

The correct answer reflects this arrangement, as it effectively describes that every second normal heartbeat is followed by a junctional beat. This pattern can create a rhythm that might be noticeable on the EKG as alternating normal cycles with the premature beats interspersed.

Understanding this pattern is important for EKG interpretation as it helps in identifying the underlying heart rhythm and distinguishing between different types of arrhythmias. Recognizing the occurrence of PJBs in this specific trigeminy formation allows clinicians to make informed decisions about patient management and possible treatment options based on the rhythm's implications.