Certified EKG Technician (CET) Practice Exam 2025 – Comprehensive Test Prep

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What does a regular R-R interval on an EKG suggest?

An irregular heart rhythm

Stable underlying rhythm

A regular R-R interval on an EKG indicates a stable underlying rhythm. This stability suggests that the electrical signals driving the heartbeat are consistently delivered over time, resulting in evenly spaced QRS complexes. When the R-R intervals are regular, this usually implies that the heart is functioning normally and maintaining a steady rate, which is a hallmark of a well-coordinated cardiac activity.

In contrast, irregular R-R intervals could signal issues such as arrhythmias, where the heart rhythm becomes inconsistent. A stable rhythm is critical in ensuring effective blood flow and overall cardiovascular health, making the regularity of the R-R interval an important aspect of EKG interpretation.

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Presence of cardiac arrhythmias

Increased heart rate variability

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