EKG certification Certification FREE EKG Certification MCQ Question and Answers 2

Question 1

A patient's EKG shows a prolonged PR interval greater than 0.20 seconds with consistent P-to-QRS conduction. What is the most likely diagnosis?

Accepted Answer

First-degree AV block

Answer

A PR interval consistently greater than 0.20 seconds with every P wave followed by a QRS complex is the hallmark of first-degree AV block.

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 recognizable EKG manifestation of hyperkalemia.

Question 3

What does the QRS complex represent on an EKG tracing?

Accepted Answer

Ventricular depolarization

Answer

The QRS complex represents the electrical depolarization of the right and left ventricles.

Question 4

A rhythm strip shows irregularly irregular R-R intervals with no identifiable P waves. What is the most likely rhythm?

Accepted Answer

Atrial fibrillation

Answer

Atrial fibrillation is characterized by irregularly irregular R-R intervals and the absence of distinct P waves due to chaotic atrial activity.

Question 5

In which lead grouping would you expect to see ST elevation during an anterior wall myocardial infarction?

Accepted Answer

V1-V4

Answer

Leads V1 through V4 overlie the anterior wall of the left ventricle and will show ST elevation during an anterior MI.

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