CRAT - Certified Rhythm Analysis Technician ECG Troubleshooting and Artifacts Questions and Answers

Question 1

A CRAT observes an ECG tracing with a thick, uniform, and fuzzy baseline. The interference is regular and consistent across all leads. Which of the following is the most likely cause of this artifact?

Accepted Answer

AC (60-cycle) interference

Answer

Patient shivering

Answer

Loose limb electrode

Answer

Patient respiration

Question 2

A technician is reviewing a rhythm strip and notices the isoelectric line slowly drifting up and down in a wave-like pattern. This artifact is most consistent with:

Accepted Answer

Wandering baseline

Answer

Somatic tremor

Answer

A disconnected lead

Answer

60-cycle interference

Question 3

Which of the following actions is most effective in reducing somatic tremor artifact on an ECG tracing?

Accepted Answer

Ensuring the patient is warm and relaxed in a comfortable position.

Answer

Unplugging non-essential electrical devices in the room.

Answer

Applying fresh electrodes with adequate gel.

Answer

Adjusting the ECG machine's filter settings.

Question 4

While monitoring a patient, the CRAT suddenly observes a flat line on Lead II, while Leads I and III appear normal. What is the MOST appropriate first step?

Accepted Answer

Check the electrodes and lead wires for the right arm and left leg.

Answer

Initiate a code blue.

Answer

Check the patient's pulse and responsiveness.

Answer

Replace the telemetry transmitter battery.

Question 5

A patient's ECG shows a chaotic and irregular baseline with fine, jagged spikes. The patient is awake, alert, and reports feeling cold. This artifact can be best identified as:

Accepted Answer

Somatic tremor

Answer

Electromagnetic interference

Answer

Poor electrode contact

Answer

Baseline sway

Question 6

To troubleshoot a wandering baseline artifact on an ECG, which of the following is the LEAST likely to be a corrective action?

Accepted Answer

Unplugging a nearby fan or cell phone charger.

Answer

Moving electrodes from bony areas to fleshier locations.

Answer

Ensuring the patient's skin is clean and dry before electrode application.

Answer

Checking that lead cables are not pulling on the electrodes.