EKG certification Certification FREE EKG Certification Question and Answers 3

Question 1

On an EKG, what is the normal duration of the QRS complex?

Accepted Answer

0.06 to 0.10 seconds

Answer

The normal QRS duration is 0.06 to 0.10 seconds, representing the time for ventricular depolarization through the His-Purkinje system.

Question 2

A patient presents with an irregularly irregular rhythm with no discernible P waves on EKG. What is the most likely diagnosis?

Accepted Answer

Atrial fibrillation

Answer

Atrial fibrillation is characterized by an irregularly irregular rhythm with fibrillatory baseline and absence of organized P waves.

Question 3

Which EKG finding suggests left ventricular hypertrophy using the Sokolow-Lyon criteria?

Accepted Answer

S wave in V1 plus R wave in V5 or V6 exceeds 35 mm

Answer

The Sokolow-Lyon criteria diagnose LVH when the sum of the S wave in V1 and the R wave in V5 or V6 exceeds 35 mm.

Question 4

What does the presence of Q waves in leads V1 through V4 on an EKG most likely indicate?

Accepted Answer

Anterior myocardial infarction

Answer

Pathological Q waves in the anterior leads V1-V4 indicate prior anterior wall myocardial infarction with transmural necrosis.

Question 5

During EKG interpretation, what artifact is most commonly caused by patient movement or shivering?

Accepted Answer

Baseline wander and muscle tremor artifact

Answer

Patient movement and shivering cause irregular baseline distortion and high-frequency muscle tremor artifact on the EKG tracing.

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