EKG certification Certification EKG Interpretation & Waveforms 2

Question 1

A patient's EKG shows a prolonged QT interval measuring 520 ms. Which of the following is the MOST significant risk associated with this finding?

Accepted Answer

Torsades de pointes

Answer

Prolonged QT interval increases the risk of torsades de pointes, a potentially fatal polymorphic ventricular tachycardia.

Question 2

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

Accepted Answer

Delta wave with shortened PR interval

Answer

WPW syndrome is identified by a delta wave (slurred upstroke of the QRS), shortened PR interval, and widened QRS complex due to an accessory pathway.

Question 3

On a standard 12-lead EKG, which leads directly view the inferior wall of the heart?

Accepted Answer

II, III, aVF

Answer

Leads II, III, and aVF are the inferior leads that view the bottom surface of the heart supplied primarily by the right coronary artery.

Question 4

A rhythm strip shows an irregularly irregular rhythm with no discernible P waves and a ventricular rate of 130 bpm. What is the MOST likely interpretation?

Accepted Answer

Atrial fibrillation with rapid ventricular response

Answer

An irregularly irregular rhythm with absent P waves and a rapid ventricular rate is the classic presentation of atrial fibrillation with rapid ventricular response.

Question 5

What does ST segment depression in leads V1-V4 during an acute clinical presentation MOST likely indicate?

Accepted Answer

Posterior wall myocardial infarction

Answer

Reciprocal ST depression in V1-V4 with acute symptoms suggests a posterior MI, which should be confirmed with posterior leads V7-V9.

EKG certification Practice Test

EKG certification Practice Test

EKG certification Certification EKG Interpretation & Waveforms 2