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

Lead reversal occurs when electrodes are attached to the wrong limbs or precordial positions, producing inaccurate or mirror-image tracings.

Question 2

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

Accepted Answer

V1

Answer

V1 is placed at the fourth intercostal space just to the right of the sternum, making it one of the two septal leads.

Question 3

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

Accepted Answer

White

Answer

In the AHA color coding system used in the US, the right arm electrode is white, while the left arm is black, right leg is green, and left leg is 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

Electrodes should be replaced if they lose adhesion or dry out, as poor electrode-skin contact leads to artifact and inaccurate recordings.

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

The 40 Hz low-pass filter reduces high-frequency muscle noise but may slightly reduce the amplitude of sharp waveform components like the QRS.

EKG certification Practice Test

EKG certification Practice Test

EKG certification Certification EKG Equipment & Artifact Troubleshooting 2