Certified Clinical Medical Assistant Exam Practice Question

Correct Answer: A

Rationale: The 12-lead EKG specifically measures the electrical activity of the heart, providing insights into heart rhythm, conduction pathways, and any potential abnormalities.

Option B, oxygen saturation, is assessed through pulse oximetry, not an EKG. Option C, arterial flow, is evaluated through imaging techniques like ultrasound or angiography, rather than electrical activity. Option D, systolic pressure, is measured using a sphygmomanometer and is not directly reflected in an EKG tracing. Thus, only option A accurately describes what a 12-lead EKG records.