EKG certification Certification EKG Certification Interpretation 1

Question 1

A rhythm strip shows a PR interval that progressively lengthens with each beat until a QRS complex is dropped, after which the cycle repeats. Which type of heart block does this represent?

Accepted Answer

Mobitz Type I (Wenckebach) second-degree AV block

Answer

First-degree AV block

Answer

Mobitz Type II second-degree AV block

Answer

Complete (third-degree) AV block

Question 2

An EKG shows a wide QRS complex tachycardia at 180 bpm with AV dissociation and fusion beats. What is the most likely diagnosis?

Accepted Answer

Ventricular tachycardia

Answer

Supraventricular tachycardia with aberrant conduction

Answer

Atrial flutter with 2:1 block

Answer

Wolff-Parkinson-White syndrome

Question 3

A patient's EKG reveals ST elevation in leads II, III, and aVF with reciprocal ST depression in leads I and aVL. Which coronary artery is most likely involved?

Accepted Answer

Right coronary artery

Answer

Left anterior descending artery

Answer

Left circumflex artery

Answer

Left main coronary artery

Question 4

An EKG shows a short PR interval of 0.10 seconds and a slurred upstroke at the beginning of the QRS complex (delta wave). Which condition does this pattern indicate?

Accepted Answer

Wolff-Parkinson-White (WPW) syndrome

Answer

Brugada syndrome

Answer

Long QT syndrome

Answer

Left bundle branch block

Question 5

Which EKG finding is most consistent with a right bundle branch block (RBBB)?

Accepted Answer

RSR' ('rabbit ears') pattern in V1 and a wide S wave in leads I and V6

Answer

Broad, notched R wave in leads V5 and V6 with lateral ST depression

Answer

Tall R wave in V1 with ST depression and T-wave inversion

Answer

Diffuse ST elevation in a saddle-shaped pattern across multiple leads

Question 6

A patient on digoxin therapy has an EKG showing a downsloping ST depression described as 'scooped' or 'Salvador Dali moustache' morphology. What does this finding represent?

Accepted Answer

Digoxin effect (digitalis effect)

Answer

Acute anterolateral STEMI

Answer

Hypokalemia-induced T-wave changes

Answer

Third-degree AV block