CVT ECG Interpretation & Analysis 2

Question 1

Which ECG finding is most characteristic of Wolff-Parkinson-White (WPW) syndrome?

Accepted Answer

Delta wave with short PR interval

Answer

WPW is characterized by a delta wave (slurred QRS upstroke) and a short PR interval (<120 ms) due to an accessory pathway bypassing the AV node.

Question 2

A patient's ECG shows an RSR' pattern in V1 and a wide S wave in lead I. This pattern is consistent with:

Accepted Answer

Right bundle branch block

Answer

Right bundle branch block (RBBB) produces an RSR' (rabbit ears) pattern in V1 and a wide S wave in leads I and V6.

Question 3

On a 12-lead ECG, ST elevation in leads II, III, and aVF with reciprocal depression in I and aVL suggests:

Accepted Answer

Inferior STEMI

Answer

Leads II, III, and aVF are inferior leads; ST elevation there with reciprocal changes in high lateral leads (I, aVL) localizes the infarct to the inferior wall.

Question 4

Torsades de pointes is most closely associated with which underlying ECG abnormality?

Accepted Answer

Prolonged QT interval

Answer

Torsades de pointes is a polymorphic ventricular tachycardia that arises in the setting of a prolonged QT interval, creating dispersion of repolarization.

Question 5

Which lead provides the best view for identifying P waves in a patient with a rapid heart rate?

Accepted Answer

Lead V1

Answer

Lead V1 is positioned over the right atrium and clearly shows P wave morphology, making it ideal for identifying atrial activity at fast heart rates.

(CVT) Cardiovascular Technologist Certification Practice Test

(CVT) Cardiovascular Technologist Certification Practice Test

CVT ECG Interpretation & Analysis 2