EKG certification Certification FREE EKG Certification Interpretation Question and Answers 3

Question 1

A patient's EKG reveals a wide QRS complex (>120 ms) with an RSR' pattern in lead V1 and a wide S wave in leads I and V6. What is the most likely diagnosis?

Accepted Answer

Right bundle branch block

Answer

An RSR' pattern in V1 with a wide S wave in leads I and V6 and QRS duration greater than 120 ms is the classic presentation of right bundle branch block.

Question 2

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

Accepted Answer

Shortened PR interval with delta wave

Answer

WPW syndrome features a short PR interval, delta wave slurring the QRS upstroke, and a widened QRS due to ventricular pre-excitation via an accessory pathway.

Question 3

An EKG shows a regular wide-complex tachycardia at 180 bpm with AV dissociation. What is the most likely rhythm?

Accepted Answer

Ventricular tachycardia

Answer

A regular wide-complex tachycardia with AV dissociation strongly suggests ventricular tachycardia rather than a supraventricular origin.

Question 4

On a 12-lead EKG, which finding suggests left ventricular hypertrophy using the Sokolow-Lyon criteria?

Accepted Answer

S wave in V1 plus R wave in V5 or V6 greater than 35 mm

Answer

The Sokolow-Lyon criteria define LVH as the sum of S wave depth in V1 and R wave height in V5 or V6 exceeding 35 mm.

Question 5

A patient's rhythm strip shows a progressively lengthening PR interval followed by a dropped QRS complex, then the cycle repeats. What is this rhythm?

Accepted Answer

Second-degree AV block Type I (Wenckebach)

Answer

Progressive PR prolongation culminating in a non-conducted P wave with a repeating cycle is the defining pattern of Mobitz Type I (Wenckebach) block.

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EKG certification Certification FREE EKG Certification Interpretation Question and Answers 3