CET EKG Technician Skills and Knowledge Base 5

Question 1

A pacemaker spike followed by a wide QRS complex most likely indicates:

Accepted Answer

Ventricular pacing

Answer

Atrial pacing

Answer

Dual-chamber pacing with sensing failure

Answer

Normal sinus rhythm with bundle branch block

Question 2

Which precordial lead provides the best view of right ventricular activity?

Accepted Answer

V1

Answer

V5

Answer

V6

Answer

V4

Question 3

Before performing an EKG on a patient with a temporary transvenous pacemaker, the technician should:

Accepted Answer

Verify the pacemaker settings and inform the supervising clinician

Answer

Remove the pacemaker leads to prevent interference

Answer

Increase the paper speed to 50 mm/sec for better spike visibility

Answer

Apply only 6 precordial leads to avoid pacemaker interaction

Question 4

The T wave on an EKG represents:

Accepted Answer

Ventricular repolarization

Answer

Atrial depolarization

Answer

Ventricular depolarization

Answer

Atrial repolarization

Question 5

A patient's EKG shows a short PR interval and a delta wave at the beginning of the QRS. This pattern is consistent with:

Accepted Answer

Wolff-Parkinson-White (WPW) syndrome

Answer

Left bundle branch block

Answer

Second-degree AV block Mobitz I

Answer

Hypertrophic cardiomyopathy

Question 6

When measuring the QT interval, the measurement should be taken from:

Accepted Answer

The beginning of the Q wave to the end of the T wave

Answer

The peak of the Q wave to the peak of the T wave

Answer

The end of the S wave to the peak of the T wave

Answer

The beginning of the P wave to the end of the T wave

Question 7

Which of the following best describes the proper technique for applying limb electrodes to a patient with an amputated right arm?

Accepted Answer

Place the right arm electrode on the right shoulder or upper right torso

Answer

Place the right arm electrode on the left arm instead

Answer

Skip all leads involving the right arm electrode

Answer

Place the right arm electrode on the right leg