Patient Care Technician (PCT) AAH Practice Exam

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How can a PJC affect heart rhythm?

It causes a regular heartbeat
It leads to a prolonged PRI
It results in an irregular heart rhythm
It always precedes a heart attack

The correct answer is: It results in an irregular heart rhythm

When considering how a Premature Junctional Contraction (PJC) affects heart rhythm, it is essential to understand the nature of this specific arrhythmia. A PJC occurs when an impulse originates in the junctional area of the heart (the area between the atria and ventricles) and can disrupt the regular pattern of electrical conduction. Due to the early occurrence of this contraction, it does not allow enough time for the heart to fill with blood, which can lead to an irregular rhythm. As a result, the overall heartbeat is not consistent, and patients may experience sensations of palpitations or irregularity, confirming that PJCs result in an irregular heart rhythm. While PJCs can be benign and often do not require treatment, their irregular nature is what differentiates them from a regular heartbeat and explains their classification as an arrhythmia. Understanding this can aid healthcare professionals in effectively monitoring and addressing any related patient concerns.