CET EKG Technician Skills and Knowledge Base 3

Question 1

What does ST segment elevation in two or more contiguous leads typically indicate?

Accepted Answer

Acute myocardial infarction or injury

Answer

Ventricular hypertrophy

Answer

Bundle branch block

Answer

Electrolyte imbalance

Question 2

When recording a 12-lead EKG, the standard paper speed in the United States is:

Accepted Answer

25 mm/sec

Answer

10 mm/sec

Answer

50 mm/sec

Answer

100 mm/sec

Question 3

A patient's EKG shows a sawtooth baseline at 300 bpm with a ventricular rate of 150 bpm. This rhythm is:

Accepted Answer

Atrial flutter with 2:1 block

Answer

Atrial fibrillation

Answer

Multifocal atrial tachycardia

Answer

Supraventricular tachycardia

Question 4

Which artifact on an EKG tracing is most commonly caused by patient movement or muscle tremor?

Accepted Answer

Somatic tremor artifact

Answer

AC interference (60 Hz noise)

Answer

Baseline wander

Answer

Electrode pop artifact

Question 5

On a standard EKG, the amplitude (voltage) calibration is set so that 1 mV equals:

Accepted Answer

10 mm

Answer

5 mm

Answer

15 mm

Answer

20 mm

Question 6

Which of the following conditions can cause a prolonged QT interval?

Accepted Answer

Hypokalemia

Answer

Hyperkalemia

Answer

Hypercalcemia

Answer

Hypernatremia

Question 7

The right leg electrode in a standard 12-lead EKG serves as:

Accepted Answer

An electrical ground to reduce noise

Answer

The positive terminal for lead II

Answer

The negative terminal for lead aVR

Answer

A reference for precordial leads