Question: An ECG shows an underlying normal sinus rhythm in which every normal sinus beat is followed by a premature, wide, bizarre QRS complex without a preceding P wave. What is the cardiac rhythm?

Answer Options: A. Normal sinus rhythm with PACs B. Normal sinus rhythm C. Normal sinus rhythm with ventricular bigeminy D. Ventricular paced rhythm

Answer: C. Normal sinus rhythm with ventricular bigeminy Question 2

Question: An ECG shows a regular rhythm with a pacemaker spike occurring before each P wave, followed by normal AV conduction and a relatively narrow QRS complex. What is the cardiac rhythm?

Answer Options: A. Atrial paced rhythm B. Atrioventricular paced rhythm C. Normal sinus rhythm D. Ventricular paced rhythm

Answer: A. Atrial paced rhythm Question 3

Question: An ECG shows a very rapid, regular rhythm composed of wide, abnormal QRS complexes with no clearly identifiable P waves. What is the cardiac rhythm?

Answer Options: A. Ventricular fibrillation B. Idioventricular rhythm C. Supraventricular tachycardia D. Ventricular tachycardia

Answer: D. Ventricular tachycardia Question 4

Question: An ECG shows a regular rhythm in which every P wave is followed by a QRS complex, but the PR interval is consistently longer than 0.20 seconds. What is the cardiac rhythm?

Answer Options: A. Junctional escape rhythm B. Normal sinus rhythm C. First-degree AV block D. Sinus bradycardia

Answer: C. First-degree AV block Question 5

Question: An ECG shows a very rapid, regular, wide-complex rhythm without discernible P waves. What is the cardiac rhythm?

Answer Options: A. Asystole B. Idioventricular rhythm C. Ventricular fibrillation D. Ventricular tachycardia

Answer: D. Ventricular tachycardia Question 6

Question: An ECG shows an essentially flat baseline with no identifiable P waves, QRS complexes, or organized cardiac electrical activity. What is the cardiac rhythm?

Answer Options: A. Ventricular fibrillation B. Idioventricular rhythm C. Asystole D. Ventricular tachycardia

Answer: C. Asystole Question 7

Question: An ECG shows a single pacemaker spike immediately before each wide QRS complex, with no normally conducted P wave preceding the ventricular complex. What is the cardiac rhythm?

Answer Options: A. Ventricular paced rhythm B. Ventricular tachycardia C. Atrioventricular paced rhythm D. Atrial paced rhythm

Answer: A. Ventricular paced rhythm Question 8

Question: An ECG shows a regular narrow-complex rhythm at approximately 60–100 beats per minute with absent or retrograde P waves. What is the cardiac rhythm?

Answer Options: A. Accelerated junctional rhythm B. Idioventricular rhythm C. Normal sinus rhythm D. Atrial fibrillation

Answer: A. Accelerated junctional rhythm Question 9

Question: An ECG shows a slow, regular ventricular rhythm with wide, bizarre QRS complexes and no identifiable P waves preceding the QRS complexes. What is the cardiac rhythm?

Answer Options: A. Idioventricular rhythm B. Sinus bradycardia C. Third-degree AV block D. Accelerated junctional rhythm

Answer: A. Idioventricular rhythm Question 10

Question: An ECG shows an underlying normal sinus rhythm interrupted by occasional premature, wide, bizarre QRS complexes without preceding P waves. These premature beats are followed by compensatory pauses and do not occur after every normal beat. What is the cardiac rhythm?

Answer Options: A. Normal sinus rhythm with ventricular bigeminy B. Normal sinus rhythm with PVCs C. Normal sinus rhythm with PACs D. Second-degree AV block Type II

Answer: B. Normal sinus rhythm with PVCs Question 11

Question: An ECG shows an extremely rapid wide-complex ventricular rhythm with changing QRS morphology and no identifiable normal P waves. What is the cardiac rhythm?

Answer Options: A. Idioventricular rhythm B. Atrial flutter C. Sinus tachycardia D. Ventricular tachycardia

Answer: D. Ventricular tachycardia Question 12