EKG certification Certification EKG Equipment & Artifact Troubleshooting 2

Question 1

What does the term 'lead reversal' mean in the context of a 12-lead EKG?

Accepted Answer

Electrodes have been placed on incorrect body sites

Answer

The machine is printing leads in the wrong order

Answer

The paper speed is reversed

Answer

The sensitivity is inverted

Question 2

Which precordial lead is placed at the fourth intercostal space to the right of the sternum?

Accepted Answer

V1

Answer

V2

Answer

V3

Answer

V4

Question 3

What color is the right arm electrode lead wire in the standard US (AHA) color coding system?

Accepted Answer

White

Answer

Green

Answer

Black

Answer

Red

Question 4

When should an EKG technician replace disposable electrodes during a patient visit?

Accepted Answer

If the electrode loses adhesion or the gel dries out before recording

Answer

Only if the patient requests it

Answer

After every 30 minutes of monitoring

Answer

Electrodes should never be replaced mid-session

Question 5

Which EKG filter setting is used to reduce muscle artifact and motion noise while potentially affecting high-frequency components?

Accepted Answer

40 Hz low-pass filter

Answer

0.05 Hz high-pass filter

Answer

150 Hz low-pass filter

Answer

60 Hz notch filter

Question 6

What is the recommended action when somatic tremor artifact is identified on an EKG strip?

Accepted Answer

Ask the patient to hold their breath and relax muscles, then re-record

Answer

Continue recording and note artifact in the report

Answer

Increase the paper speed

Answer

Switch to half sensitivity