CRAT - Certified Rhythm Analysis Technician Patient Monitoring and Safety Questions and Answers

Question 1

A patient's ECG monitor suddenly displays a thick, fuzzy baseline with erratic, high-frequency spikes, obscuring the QRS complexes.
The patient is awake and shivering.
What is the most likely cause of this artifact and the technician's most appropriate initial action?

Accepted Answer

Muscle artifact; provide the patient with a warm blanket.

Answer

60-cycle interference; unplug nearby electrical devices.

Answer

Wandering baseline; re-prep the skin and change the electrodes.

Answer

Ventricular fibrillation; immediately activate a code blue.

Question 2

A CRAT is setting up a telemetry monitor for a stable adult patient with a baseline sinus rhythm of 80 bpm. To minimize non-actionable alarms while ensuring safety, which of the following heart rate alarm settings is most appropriate?

Accepted Answer

High: 120 bpm, Low: 50 bpm

Answer

High: 90 bpm, Low: 70 bpm

Answer

High: 150 bpm, Low: 40 bpm

Answer

High: 100 bpm, Low: 60 bpm

Question 3

While reviewing a 12-lead ECG, a technician observes that the P wave and QRS complex are inverted in Lead I and upright in lead aVR. The R-wave progression in the precordial leads is normal. What is the most likely cause of these findings?

Accepted Answer

Reversal of the left arm and right arm electrodes

Answer

Dextrocardia

Answer

Reversal of the right arm and left leg electrodes

Answer

Posterior myocardial infarction

Question 4

A CRAT at a central monitoring station observes a patient's rhythm abruptly change to a chaotic, disorganized pattern with no identifiable QRS complexes. What is the technician's IMMEDIATE priority?

Accepted Answer

Activate the emergency response system (e.g., call a 'code blue') and notify the nurse.

Answer

Check the patient's medical record for a Do-Not-Resuscitate (DNR) order.

Answer

Continue to observe the rhythm for 30 seconds to confirm it is not a temporary artifact.

Answer

Troubleshoot the electrodes to rule out a loose lead.

Question 5

A technician notices a slow, undulating, up-and-down drift of the isoelectric line on a patient's ECG strip. This type of artifact is best described as:

Accepted Answer

Wandering baseline

Answer

60-cycle interference

Answer

Somatic tremor

Answer

AC interference

Question 6

To ensure electrical safety and prevent microshock to an electrically susceptible patient during ECG monitoring, which of the following is a critical safety feature of the equipment?

Accepted Answer

A properly functioning three-prong, grounded plug

Answer

Using a two-prong plug to avoid ground interference

Answer

Plugging the monitor into a multi-outlet power strip

Answer

Ensuring the lead wires are less than three feet long