Free ECG Technician Certification Exam Question and Answers

Question 1

The waveforms in the middle are referred to as what?

Accepted Answer

Segment

Answer

On an EKG, a segment refers to the isoelectric line (flat line) between two waves. For example, the PR segment is the flat line between the end of the P wave and the beginning of the QRS complex, and the ST segment is the flat line between the end of the QRS complex and the beginning of the T wave. Segments represent periods of electrical inactivity or repolarization.

Question 2

The PR portion is what?

Accepted Answer

Depolarization of AV node and its delay and depolarization of Bundle of His and Bundle branches

Answer

The PR interval represents the time it takes for an electrical impulse to travel from the atria through the AV node, the Bundle of His, and the bundle branches to the Purkinje fibers. This includes the depolarization of the AV node and its crucial delay, which allows the atria to fully contract and empty blood into the ventricles before ventricular contraction begins. It does not represent atrial repolarization.

Question 3

What do the tiny squares on the EKG paper's horizontal axis represent?

Accepted Answer

0.04 sec

Answer

On standard EKG paper, the horizontal axis represents time. Each small square measures 1 millimeter and corresponds to 0.04 seconds. Five small squares make up one large square, representing 0.20 seconds. This calibration is crucial for accurately measuring intervals and durations on an EKG.

Question 4

What stands for the QRS complex?

Accepted Answer

The depolarization of ventricles

Answer

The QRS complex on an EKG represents the depolarization of the ventricles. This electrical event triggers the contraction of the ventricular muscle, which pumps blood out of the heart to the lungs and the rest of the body. Atrial depolarization is represented by the P wave, and ventricular repolarization by the T wave.

Question 5

What is the ideal breaths-to-compressions ratio during CPR?

Accepted Answer

2 breaths to 30 compressions

Answer

The ideal breaths-to-compressions ratio during CPR for adults is 2 breaths to 30 compressions. This standard, recommended by organizations like the American Heart Association, prioritizes continuous chest compressions to maintain vital blood flow. The two rescue breaths are then delivered to provide oxygenation to the lungs, ensuring a balance between circulation and ventilation.

EKG certification Practice Test

EKG certification Practice Test

Free ECG Technician Certification Exam Question and Answers