CCMA EKG Administration 2

Question 1

What does the P wave on an ECG represent?

Accepted Answer

Atrial depolarization

Answer

The P wave represents the electrical depolarization of the atria, which initiates atrial contraction.

Question 2

A heart rate of 52 beats per minute would be classified as:

Accepted Answer

Bradycardia

Answer

Bradycardia is defined as a resting heart rate below 60 beats per minute.

Question 3

Which artifact on an ECG is caused by the patient's muscle movement or shivering?

Accepted Answer

Somatic muscle artifact

Answer

Somatic muscle artifact is caused by voluntary or involuntary muscle movement (trembling, shivering, Parkinson's tremor) and appears as irregular, erratic baseline movement.

Question 4

On ECG graph paper, what does each small square represent in time?

Accepted Answer

0.04 seconds

Answer

On standard ECG graph paper run at 25 mm/sec, each small (1 mm) square equals 0.04 seconds (40 milliseconds) in the horizontal (time) axis.

Question 5

Before applying ECG electrodes, the medical assistant should prepare the patient's skin by:

Accepted Answer

Cleaning the skin with alcohol, drying it, and clipping chest hair if necessary

Answer

Skin preparation for ECG involves removing oils and dead skin cells with alcohol, ensuring the skin is dry, and clipping (not shaving) excessive chest hair to improve electrode contact.

CCMA - Certified Clinical Medical Assistant Practice Test

CCMA - Certified Clinical Medical Assistant Practice Test

CCMA EKG Administration 2