EKG certification Certification FREE EKG Certification Question and Answers 2

Question 1

A patient's EKG shows a regular rhythm with a rate of 150 bpm, narrow QRS complexes, and no visible P waves. What is the most likely rhythm?

Accepted Answer

Supraventricular tachycardia

Answer

SVT typically presents with a regular narrow-complex tachycardia around 150 bpm with P waves buried in the QRS or T waves.

Question 2

Which EKG finding is most characteristic of hyperkalemia?

Accepted Answer

Peaked T waves

Answer

Peaked, tall T waves are the earliest and most characteristic EKG manifestation of hyperkalemia.

Question 3

In a 12-lead EKG, ST elevation in leads II, III, and aVF indicates ischemia in which coronary artery territory?

Accepted Answer

Right coronary artery

Answer

Leads II, III, and aVF reflect the inferior wall of the heart, which is most commonly supplied by the right coronary artery.

Question 4

What does a prolonged PR interval greater than 0.20 seconds on an EKG indicate?

Accepted Answer

First-degree AV block

Answer

A PR interval consistently greater than 0.20 seconds with all P waves conducted defines first-degree AV block.

Question 5

Which EKG lead is best for evaluating atrial rhythm and identifying P waves?

Accepted Answer

Lead II

Answer

Lead II provides the best view of P waves because its axis is nearly parallel to the normal atrial depolarization vector.

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