Free EKG Technician Certification Question and Answers

Question 1

The waveforms in the middle are referred to as what?

Accepted Answer

Segment

Answer

In EKG interpretation, a segment refers to the flat line connecting two waveforms, representing a period of electrical inactivity or delay. For example, the PR segment connects the P wave to the QRS complex, and the ST segment connects the QRS complex to the T wave. These segments are crucial for assessing the heart's conduction system.

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 segment on an EKG represents the physiological delay of the electrical impulse as it passes through the AV node, Bundle of His, and bundle branches. This delay allows for complete atrial contraction and ventricular filling before ventricular depolarization and subsequent contraction begin. It is a critical period for proper cardiac function.

Question 3

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

Accepted Answer

0.04 sec

Answer

EKG paper is standardized with a grid where small squares measure 1mm by 1mm. On the horizontal axis, which represents time, each tiny square corresponds to 0.04 seconds. This precise measurement allows for accurate calculation of heart rate and the duration of various cardiac events, which is vital for diagnosis.

Question 4

What stands for the QRS complex?

Accepted Answer

The depolarization of ventricles

Answer

The QRS complex is the most prominent waveform on an EKG and represents the rapid depolarization of the ventricles. This electrical event triggers ventricular contraction, which is responsible for pumping blood out of the heart to the body and lungs. It is a key indicator of ventricular function.

Question 5

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

Accepted Answer

2 breaths to 30 compressions

Answer

For adult CPR, the universally recommended ratio of compressions to breaths is 30 compressions followed by 2 rescue breaths. This ratio prioritizes continuous chest compressions to maintain blood flow to vital organs, while still providing adequate ventilation. This standard is taught in basic life support courses to maximize effectiveness.

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Free EKG Technician Certification Question and Answers