CCT - Certified Cardiographic Technician ECG Fundamentals and Leads Questions and Answers

Question 1

A Certified Cardiographic Technician is preparing to perform a standard 12-lead ECG.
At what speed should the technician set the electrocardiograph machine to ensure the tracing is recorded according to industry standards?

Accepted Answer

25 mm/sec

Answer

10 mm/sec

Answer

50 mm/sec

Answer

100 mm/sec

Question 2

A patient's ECG tracing shows significant artifact in leads I and II, but lead III appears clear. Which of the following electrodes is the most likely source of the artifact?

Accepted Answer

Right Arm (RA)

Answer

Left Arm (LA)

Answer

Left Leg (LL)

Answer

Right Leg (RL)

Question 3

Which of the following lead groups provides the primary view of the inferior wall of the left ventricle?

Accepted Answer

II, III, aVF

Answer

V1, V2

Answer

I, aVL, V5, V6

Answer

V3, V4

Question 4

During a 12-lead ECG, the technician ensures all electrodes are placed correctly. What is the primary function of the electrode placed on the patient's right leg?

Accepted Answer

It acts as a ground to reduce electrical interference.

Answer

It serves as the positive electrode for lead aVR.

Answer

It measures the electrical potential of the inferior wall.

Answer

It is the negative electrode for leads II and III.

Question 5

A CCT student incorrectly places the V1 and V2 electrodes two intercostal spaces higher than the standard location (i.e., in the 2nd intercostal space instead of the 4th). Which of the following ECG changes is a likely result of this misplacement?

Accepted Answer

A pattern that may mimic an anterior ST-elevation MI or incomplete RBBB

Answer

An exaggerated R wave in V1

Answer

Inversion of the QRS complex in all precordial leads

Answer

A significant increase in the amplitude of the T wave in V6

Question 6

Which of the following are considered the standard bipolar limb leads, forming the basis of Einthoven's triangle?

Accepted Answer

I, II, III

Answer

aVR, aVL, aVF

Answer

V1, V2, V3

Answer

V4, V5, V6

A Certified Cardiographic Technician is preparing to perform a standard 12-lead ECG.At what speed should the technician set the electrocardiograph machine to ensure the tracing is recorded according to industry standards?

A Certified Cardiographic Technician is preparing to perform a standard 12-lead ECG.
At what speed should the technician set the electrocardiograph machine to ensure the tracing is recorded according to industry standards?