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

Posterior MI appears as a mirror image in V1-V2: tall, broad R waves (posterior Q equivalents) and ST depression (reciprocal of posterior ST elevation), confirmed with posterior leads V7-V9.

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

The WPW pre-excitation pattern consists of a short PR interval (accessory pathway bypasses AV node), a delta wave (initial slow ventricular activation via the pathway), and a widened QRS.

Question 3

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

Accepted Answer

V1

Answer

Lead V1 sits directly over the right atrium and provides the clearest biphasic P wave, making it ideal for identifying atrial activity, flutter waves, and P-wave morphology.

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

Brugada pattern (coved-type ST elevation with RBBB morphology) is characteristically seen in the right precordial leads V1 and V2, reflecting right ventricular outflow tract abnormality.

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

Left axis deviation is defined as a QRS axis more negative than -30°, with the range of -30° to -90° representing pathological LAD on a standard 12-lead ECG.

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 2