CCT CCT - Certified Cardiographic Technician 12-Lead ECG Interpretation and Cardiac Conditions Questions and Answers 1

Question 1

Which leads make up the inferior territory of the heart on a 12-lead ECG?

Accepted Answer

II, III, aVF

Answer

I, aVL, V5, V6

Answer

V1, V2, V3

Answer

V4, V5, V6

Question 2

ST elevation in leads V1-V4 combined with a new right bundle branch block most strongly suggests:

Accepted Answer

Anterior MI with septal involvement

Answer

Posterior MI

Answer

Inferior MI

Answer

Pericarditis

Question 3

What is the hallmark ECG finding of left ventricular hypertrophy (LVH) using the Sokolow-Lyon criterion?

Accepted Answer

S in V1 + R in V5 or V6 > 35 mm

Answer

R in aVL > 11 mm only

Answer

QRS duration > 120 ms

Answer

ST elevation in V1-V2

Question 4

Reciprocal ST changes seen in leads I and aVL during an inferior MI indicate:

Accepted Answer

Reciprocal depression confirming inferior STEMI and its territory

Answer

Posterior extension of the MI

Answer

Normal variant

Answer

Anterior ischemia

Question 5

A 12-lead ECG shows ST elevation in V1-V2, deep S waves in I, and right axis deviation. Which condition does this pattern suggest?

Accepted Answer

Right ventricular hypertrophy (RVH) or strain

Answer

Left ventricular hypertrophy

Answer

Lateral MI

Answer

Wolff-Parkinson-White syndrome

Question 6

Which ECG pattern is described as diffuse concave ('saddle-back') ST elevation in most leads with PR depression, without reciprocal changes?

Accepted Answer

Pericarditis

Answer

STEMI

Answer

Brugada syndrome

Answer

Early repolarization variant