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

Leads II, III, and aVF face the inferior wall of the left ventricle, which is supplied primarily by the right coronary artery (RCA).

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

ST elevation in V1-V4 reflects anterior wall STEMI, and a new RBBB can indicate septal involvement, often due to LAD artery occlusion.

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

The Sokolow-Lyon criterion defines LVH as the sum of the S wave in V1 and the tallest R wave in V5 or V6 exceeding 35 mm.

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

ST depression in I and aVL is the expected reciprocal (mirror image) change that confirms inferior STEMI in II, III, aVF, helping to rule out pericarditis or artifact.

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

Right axis deviation, tall R in V1, and deep S in lateral leads are classic features of RVH or right ventricular strain, often seen in pulmonary hypertension or PE.

CCT - Certified Cardiographic Technician Exam Practice Test

CCT - Certified Cardiographic Technician Exam Practice Test

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