CPR ECG Rhythm Interpretation 2

Question 1

A patient presents with an irregular rhythm, no discernible P waves, and an irregularly irregular ventricular rate of 110 bpm. What is the most likely rhythm?

Accepted Answer

Atrial fibrillation

Answer

Atrial flutter with variable block

Answer

Multifocal atrial tachycardia

Answer

Wandering atrial pacemaker

Question 2

On an ECG, you observe a regular rhythm at 150 bpm with sawtooth flutter waves most visible in leads II, III, and aVF. What is the atrial rate most commonly associated with this rhythm?

Accepted Answer

300-350 bpm

Answer

200-250 bpm

Answer

250-300 bpm

Answer

350-400 bpm

Question 3

A patient's ECG shows a QRS complex of 0.14 seconds with a right bundle branch block morphology and a rate of 180 bpm with no visible P waves. What rhythm should you suspect?

Accepted Answer

Ventricular tachycardia

Answer

Supraventricular tachycardia with aberrancy

Answer

Accelerated idioventricular rhythm

Answer

Torsades de pointes

Question 4

Which ECG finding is most characteristic of hyperkalemia?

Accepted Answer

Peaked, narrow, symmetric T waves

Answer

Prolonged QT interval

Answer

Prominent U waves

Answer

Delta waves with short PR interval

Question 5

A patient in cardiac arrest has ECG showing organized electrical activity but no palpable pulse. Which rhythm is present?

Accepted Answer

Pulseless electrical activity

Answer

Asystole

Answer

Ventricular fibrillation

Answer

Fine ventricular fibrillation

Question 6

On a 12-lead ECG, ST elevation in leads II, III, and aVF with reciprocal depression in leads I and aVL suggests occlusion of which artery?

Accepted Answer

Right coronary artery

Answer

Left anterior descending artery

Answer

Left circumflex artery

Answer

Left main coronary artery

Question 7

What is the PR interval range that defines first-degree AV block in adults?

Accepted Answer

Greater than 0.20 seconds

Answer

Greater than 0.12 seconds

Answer

Greater than 0.16 seconds

Answer

Greater than 0.24 seconds