CCT CCT - Certified Cardiographic Technician 12-Lead ECG Interpretation and Cardiac Conditions Questions and Answers 2

Question 1

True posterior MI is best confirmed on a 12-lead ECG by which finding in the standard leads?

Accepted Answer

Tall broad R waves and ST depression in V1-V2 (mirror of posterior STEMI)

Answer

ST elevation in V1-V4

Answer

Q waves in II, III, aVF

Answer

Inverted P waves in V1

Question 2

A patient's 12-lead ECG shows a short PR interval (<120 ms), delta wave, and wide QRS. This triad defines:

Accepted Answer

Wolff-Parkinson-White (WPW) syndrome pre-excitation pattern

Answer

Left bundle branch block

Answer

Hyperkalemia

Answer

First-degree AV block

Question 3

Which lead is considered the best single-lead view for detecting atrial activity and identifying P-wave morphology?

Accepted Answer

V1

Answer

aVR

Answer

I

Answer

V5

Question 4

On a 12-lead ECG, a Brugada pattern is most commonly seen in which lead grouping?

Accepted Answer

Right precordial leads V1-V2

Answer

Inferior leads II, III, aVF

Answer

Lateral leads I, aVL, V5-V6

Answer

All 12 leads simultaneously

Question 5

Left axis deviation (LAD) on a 12-lead ECG is defined as the QRS axis falling between:

Accepted Answer

-30° and -90°

Answer

0° and +90°

Answer

+90° and +180°

Answer

-90° and -180°

Question 6

Which finding on a 12-lead ECG is most specific for an acute anterior STEMI caused by proximal LAD occlusion?

Accepted Answer

ST elevation in V1-V4 with reciprocal depression in II, III, aVF

Answer

ST elevation in V1-V4 with new LBBB pattern

Answer

Delta waves in V1-V3

Answer

Peaked T waves only in V2