COPR Advanced Care Paramedic (ACP) Practice Exam

Which of the following is NOT a MAT finding?

Three or more P-wave morphologies PR interval variation Heart rate is typically over 100 bpm Delta wave is present

Correct Answer:

Delta wave is present

Explanation:

MAT is identified by irregular atrial rhythm with multiple atrial foci firing, which produces at least three distinct P-wave morphologies and varying PR intervals from beat to beat. The rhythm is tachycardic, so the heart rate is typically over 100 beats per minute. Delta waves, on the other hand, are a sign of pre-excitation from an accessory pathway as seen in Wolff-Parkinson-White syndrome and are not features of MAT. So the presence of a delta wave would point away from MAT and toward WPW instead.

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