CCT Electrocardiography Procedures & Interpretation

Question 1

What does the P wave represent in an ECG?

Accepted Answer

Atrial depolarization

Answer

Ventricular depolarization

Answer

Atrial repolarization

Answer

Ventricular repolarization

Question 2

What is the normal duration of the PR interval?

Accepted Answer

0.12 to 0.20 seconds

Answer

0.08 to 0.10 seconds

Answer

0.20 to 0.28 seconds

Answer

0.30 to 0.40 seconds

Question 3

Which lead configuration is most commonly used in continuous monitoring?

Accepted Answer

Lead II

Answer

Lead I

Answer

Lead III

Answer

aVR

Question 4

Which artifact can be caused by patient movement?

Accepted Answer

Somatic tremor

Answer

60-cycle interference

Answer

Wandering baseline

Answer

AC interference

Question 5

Which part of the ECG corresponds to ventricular depolarization?

Accepted Answer

QRS complex

Answer

T wave

Answer

P wave

Answer

U wave

Question 6

What is indicated by a prolonged QT interval?

Accepted Answer

Increased arrhythmia risk

Answer

Atrial flutter

Answer

Ventricular fibrillation

Answer

Normal conduction

Question 7

Which ECG change is seen in hyperkalemia?

Accepted Answer

Peaked T waves

Answer

Flattened T waves

Answer

ST segment depression

Answer

Prolonged PR interval

Question 8

Which action is most important when preparing a patient for a 12-lead ECG?

Accepted Answer

Shave or clean the electrode sites

Answer

Ensure the patient eats a meal

Answer

Apply lotion to the chest

Answer

Use reusable electrodes

Question 9

Which condition shows ST elevation on an ECG?

Accepted Answer

Myocardial infarction

Answer

Stable angina

Answer

Pericarditis

Answer

Atrial fibrillation