ACLS Rhythm Identification Quiz

Which rhythm is indicated by a narrow QRS complex, regular rate, and P waves inverted or absent?

Sinus tachycardia

Ventricular fibrillation

Atrial fibrillation

Junctional rhythm

None

What is the defining characteristic of a first-degree AV block on an ECG?

Prolonged PR interval greater than 0.20 seconds

Irregularly irregular rhythm

Wide QRS complexes

Dropped QRS complexes

None

What rhythm is identified by the absence of atrial and ventricular activity on the ECG?

Asystole

Atrial fibrillation

Ventricular fibrillation

Sinus pause

None

What is the defining characteristic of a second-degree AV block, Mobitz type I (Wenckebach)?

Prolonged PR interval greater than 0.20 seconds

Irregularly irregular rhythm

Consistent PR interval with intermittent dropped QRS complexes

Progressive lengthening of the PR interval until a QRS complex is dropped

None

What is a common characteristic of sinus arrhythmia?

Heart rate increases with inspiration and decreases with expiration

Presence of sawtooth waves

Regular heart rate of 60-100 bpm

Wide QRS complexes

None

Which rhythm presents with a wide, bizarre QRS complex and no preceding P wave, occurring early in the cardiac cycle?

Premature ventricular contraction (PVC)

Sinus bradycardia

Junctional rhythm

Atrial fibrillation

None

Which rhythm presents with a regular rate of 60-100 bpm and occasional premature beats?

Sinus rhythm with premature atrial contractions (PACs)

Atrial fibrillation

Junctional rhythm

Ventricular tachycardia

None

What is the typical rate for junctional rhythm?

40-60 bpm

Above 150 bpm

100-150 bpm

60-100 bpm

None

Which rhythm features a regular, rapid rate with narrow QRS complexes and hidden P waves?

Third-degree AV block

Atrial fibrillation

Supraventricular tachycardia (SVT)

Ventricular tachycardia

None

10.

Which rhythm presents as a regular rhythm with a rate of 60-100 bpm and normal P waves preceding each QRS complex?

Ventricular tachycardia

Second-degree AV block

Atrial fibrillation

Normal sinus rhythm

None

11.

What is the characteristic ECG finding in a patient with hyperkalemia?

Shortened PR interval

Irregularly irregular rhythm

Tall, peaked T waves

Wide QRS complexes

None

12.

Which rhythm is identified by the presence of delta waves on the ECG?

Sinus bradycardia

Atrial fibrillation

Ventricular tachycardia

Wolff-Parkinson-White (WPW) syndrome

None

13.

Which rhythm features a regular rate of 60-100 bpm with a shortened PR interval and a delta wave?

Wolff-Parkinson-White (WPW) syndrome

Atrial fibrillation

Sinus bradycardia

Ventricular tachycardia

None

14.

Which rhythm is characterized by an irregular rhythm with varying PR intervals and intermittent dropped QRS complexes?

Sinus bradycardia

First-degree AV block

Atrial fibrillation

Second-degree AV block, Mobitz type I (Wenckebach)

None

15.

Which rhythm is characterized by a sawtooth pattern on the ECG?

Sinus bradycardia

Atrial flutter

Ventricular tachycardia

Atrial fibrillation

None

16.

What is the hallmark of third-degree (complete) heart block?

No relationship between P waves and QRS complexes

Prolonged PR interval

Rapid ventricular rate

Irregularly irregular rhythm

None

17.

What rhythm is indicated by a regular rate, normal P waves, but a PR interval longer than 0.20 seconds?

Sinus tachycardia

First-degree AV block

Third-degree AV block

Second-degree AV block, Mobitz type II

None

18.

Which rhythm has a regular rate with a PR interval that remains constant, but with occasional dropped QRS complexes?

Sinus bradycardia

Second-degree AV block, Mobitz type I

Second-degree AV block, Mobitz type II

Atrial fibrillation

None

19.

What is the identifying feature of atrial fibrillation on an ECG?

Sawtooth pattern between QRS complexes

Irregularly irregular rhythm without distinct P waves

Regular rhythm with distinct P waves

Prolonged PR interval

None

20.

Which rhythm is identified by a wide QRS complex with a rate above 100 bpm?

Sinus tachycardia

First-degree AV block

Ventricular tachycardia

Atrial flutter

None

21.

What feature distinguishes torsades de pointes from other forms of ventricular tachycardia?

Twisting of the QRS complexes around the baseline

Narrow QRS complexes

Regular, wide QRS complexes

Presence of P waves

None

22.

What is a common feature of ventricular fibrillation on an ECG?

Regular QRS complexes

Chaotic, irregular waveforms without distinct QRS complexes

Presence of P waves

Prolonged QT interval

None

23.

What is the heart rate range typically seen in sinus tachycardia?

Below 60 bpm

60-100 bpm

150-200 bpm

100-150 bpm

None

24.

Which rhythm is recognized by a regular, slow rate below 60 bpm with normal P waves and QRS complexes?

Ventricular fibrillation

Supraventricular tachycardia (SVT)

Atrial flutter

Sinus bradycardia

None

25.

What rhythm is characterized by rapid, irregular P waves and an irregularly irregular ventricular response?

Atrial fibrillation

Sinus bradycardia

Ventricular tachycardia

Atrial flutter

None

26.

What rhythm is characterized by a progressive lengthening of the PR interval until a beat is dropped?

Third-degree AV block

Second-degree AV block, Mobitz type I (Wenckebach)

Second-degree AV block, Mobitz type II

First-degree AV block

None

27.

What rhythm is indicated by a narrow QRS complex tachycardia with a rate typically between 150-250 bpm?

Paroxysmal supraventricular tachycardia (PSVT)

Ventricular tachycardia

Atrial flutter

Sinus tachycardia

None

28.

Which rhythm is characterized by chaotic, rapid electrical activity without discernible P waves, QRS complexes, or T waves?

Sinus tachycardia

Atrial fibrillation

Ventricular fibrillation

First-degree AV block

None

29.

What is the defining feature of a premature atrial contraction (PAC)?

Absence of P waves

Wide QRS complex

Prolonged QT interval

Early P wave with an abnormal shape

None

30.

What is the typical appearance of an idioventricular rhythm on an ECG?

Irregularly irregular rhythm

Wide QRS complexes with a rate of 20-40 bpm

Regular rhythm with P waves before each QRS complex

Narrow QRS complexes with a rate of 60-100 bpm

None

Time’s up

Welcome to the ACLS Rhythm Identification Quiz! This quiz will test your skills in recognizing various cardiac rhythms. Through this quiz, you’ll sharpen your ability to quickly and accurately identify rhythms crucial in Advanced Cardiovascular Life Support. Each question presents a different scenario, challenging your knowledge and decision-making.

By the end, you will have a clearer understanding of rhythm interpretation, helping you improve patient outcomes. Dive in, test your expertise, and enhance your ACLS proficiency. Let’s begin!

ACLS Rhythm Identification – FAQ

What is ACLS rhythm identification?

ACLS rhythm identification refers to the process of recognizing and interpreting heart rhythms during Advanced Cardiovascular Life Support. It is crucial for diagnosing and managing cardiac events.

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