EKG certification Certification ECG Technician Certification Exam 1

Question 1

An ECG strip shows a rhythm where P waves are present but bear no consistent relationship to QRS complexes, and the ventricular rate is slower than the atrial rate. What rhythm does this represent?

Accepted Answer

Third-degree (complete) AV block

Answer

Second-degree AV block, Mobitz Type II

Answer

Junctional tachycardia

Answer

Accelerated idioventricular rhythm

Question 2

When applying electrodes for a 12-lead ECG, where should the V4 precordial lead be placed?

Accepted Answer

Fifth intercostal space, midclavicular line

Answer

Fourth intercostal space, right sternal border

Answer

Left anterior axillary line at the level of V4

Answer

Fourth intercostal space, left sternal border

Question 3

On a standard ECG paper running at 25 mm/second, how much time does one large (5 mm) square represent?

Accepted Answer

0.20 seconds

Answer

0.04 seconds

Answer

0.10 seconds

Answer

0.40 seconds

Question 4

A patient's ECG shows saw-tooth flutter waves at a rate of approximately 300 bpm with a ventricular rate of 75 bpm. What is the AV conduction ratio?

Accepted Answer

4:1

Answer

2:1

Answer

3:1

Answer

6:1

Question 5

Which of the following findings on a resting 12-lead ECG is most consistent with left ventricular hypertrophy (LVH)?

Accepted Answer

S wave in V1 plus R wave in V5 or V6 greater than 35 mm

Answer

R wave in aVR greater than 11 mm

Answer

Q waves in leads II, III, and aVF

Answer

Delta waves in lateral leads

Question 6

During ECG acquisition, the technician notices the baseline is wandering up and down slowly on the tracing. What is the most common cause of this artifact?

Accepted Answer

Loose or dried electrode gel causing poor skin contact

Answer

60 Hz electrical interference from nearby equipment

Answer

Patient talking during the recording

Answer

Incorrect lead placement on the limbs