Cardiac Rhythm Analysis and Heart Rate Calculation Quiz

Challenge yourself with questions on ECG interpretation, heart rate calculation, and arrhythmia recognition. How well do you know cardiac rhythms?

Practice Learn Test

Which of the following represents the normal sinus rhythm on an ECG?

P wave before QRS complex

QRS complex before P wave

T wave before QRS complex

QRS complex before T wave

What is the average heart rate for an adult at rest?

60-100 bpm

100-150 bpm

30-60 bpm

150-200 bpm

What is the medical term for a slow heart rate, typically below 60 beats per minute?

Bradycardia

Tachycardia

Arrhythmia

Dysrhythmia

Which of the following arrhythmias is characterized by chaotic, irregular atrial activity?

Atrial Fibrillation

Ventricular Tachycardia

Supraventricular Tachycardia

Atrial Flutter

What is the formula to calculate heart rate from an ECG tracing?

Heart Rate = 300 / Number of Large Squares between R waves

Heart Rate = 1500 / Number of Small Squares between R waves

Heart Rate = 600 / Number of Large Squares between R waves

Heart Rate = 750 / Number of Small Squares between R waves

Which segment of the ECG represents the time taken for ventricular depolarization and repolarization?

PR interval

QRS complex

ST segment

QT interval

Which electrolyte imbalance is associated with prolonged QT interval on an ECG?

Hypercalcemia

Hyperkalemia

Hypocalcemia

Hypokalemia

What is the name of the heart rhythm disorder characterized by an absence of P waves and irregular R-R intervals?

Atrial Fibrillation

Ventricular Fibrillation

Atrial Flutter

Ventricular Tachycardia

What does the QRS complex represent in an ECG?

Atrial depolarization

Ventricular depolarization

Atrial repolarization

Ventricular repolarization

#10

Which lead placement in an ECG is used to visualize the lateral wall of the left ventricle?

Lead I

Lead II

Lead III

Lead V6

#11

Which of the following is a characteristic feature of Mobitz Type II atrioventricular (AV) block?

Progressive lengthening of PR interval until a QRS complex is dropped

Randomly occurring dropped QRS complexes without preceding changes in PR interval

Gradual shortening of PR interval followed by a dropped QRS complex

Consistently prolonged PR interval with no dropped QRS complexes

#12

Which ECG lead placement is most commonly used to diagnose an inferior myocardial infarction?

Lead I

Lead II

Lead III

Lead aVR

#13

Which of the following is a characteristic feature of ventricular fibrillation?

Regular and organized rhythm

Absence of QRS complexes

Distinct P waves

Regular ventricular rate