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Cardiac Dysrhythmias and Electrocardiography Quiz

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Which component of the electrocardiogram (ECG/EKG) represents atrial depolarization?

P wave

Explanation

First deflection in ECG, representing atrial depolarization.

Which cardiac dysrhythmia is characterized by chaotic, irregular electrical activity in the atria?

Atrial fibrillation

Explanation

Irregular heart rhythm originating in the atria.

What is the term for an abnormally fast heart rhythm originating from the ventricles?

Ventricular tachycardia

Explanation

Rapid heartbeat from ventricles.

Which segment of the ECG represents ventricular depolarization?

QRS complex

Explanation

Ventricular contraction.

Which interval on an ECG represents ventricular repolarization?

QT interval

Explanation

Time for ventricles to reset before next contraction.

What is the normal duration range for the PR interval on an ECG?

0.04 - 0.10 seconds

Explanation

Time from atrial depolarization to ventricular depolarization.

Which ECG lead placement is commonly used to detect myocardial infarctions involving the inferior wall of the heart?

Lead II

Explanation

Record electrical activity from right arm to left leg.

Which ECG finding is characteristic of hyperkalemia?

Peaked T waves

Explanation

Tall, tent-like T waves.

What is the term for a prolonged QT interval that predisposes individuals to ventricular arrhythmias?

Long QT syndrome

Explanation

Increased risk of dangerous heart rhythms.

#10

What is the typical heart rate range in sinus bradycardia?

Less than 60 bpm

Explanation

Heart rate slower than normal.

#11

Which ECG lead placement is commonly used to assess for myocardial infarctions involving the lateral wall of the heart?

Lead V5

Explanation

Record electrical activity over lateral wall.

#12

Which electrolyte abnormality can cause a prolonged QT interval on an ECG?

Hypokalemia

Explanation

Low potassium levels affecting heart rhythm.

#13

Which ECG finding is characteristic of ventricular fibrillation?

Quivering baseline

Explanation

Chaotic, irregular pattern on ECG.

#14

Which medication is commonly used to terminate supraventricular tachycardia by blocking AV nodal conduction?

Adenosine

Explanation

Slows conduction through AV node.

#15

What is the term for an ECG finding characterized by a gradual, progressive increase in the PR interval until a QRS complex is dropped?

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

Explanation

Progressive lengthening of PR interval until missed beat.

#16

Which condition is characterized by episodes of rapid heart rate originating above the ventricles with a narrow QRS complex on ECG?

Supraventricular tachycardia

Explanation

Rapid heart rate above ventricles.

#17

In which type of heart block does the PR interval progressively lengthen until a QRS complex is dropped?

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

Explanation

Progressive lengthening of PR interval until dropped beat.

#18

What is the term for an ECG pattern characterized by ST-segment elevation in leads V1-V3 with a right bundle branch block pattern?

Brugada syndrome

Explanation

Specific ECG pattern associated with genetic condition.

#19

In which ECG lead would you typically observe Q waves if there is an old myocardial infarction involving the inferior wall of the heart?

Lead III

Explanation

View of inferior wall of heart.

#20

Which ECG lead placement is most useful for detecting acute myocardial infarction involving the anterior wall of the heart?

Lead V1

Explanation

View of electrical activity over anterior wall.

Cardiac Dysrhythmias and Electrocardiography Quiz

Which component of the electrocardiogram (ECG/EKG) represents atrial depolarization?

Which cardiac dysrhythmia is characterized by chaotic, irregular electrical activity in the atria?

What is the term for an abnormally fast heart rhythm originating from the ventricles?

Which segment of the ECG represents ventricular depolarization?

Which interval on an ECG represents ventricular repolarization?

What is the normal duration range for the PR interval on an ECG?

Which ECG lead placement is commonly used to detect myocardial infarctions involving the inferior wall of the heart?

Which ECG finding is characteristic of hyperkalemia?

What is the term for a prolonged QT interval that predisposes individuals to ventricular arrhythmias?

What is the typical heart rate range in sinus bradycardia?

Which ECG lead placement is commonly used to assess for myocardial infarctions involving the lateral wall of the heart?

Which electrolyte abnormality can cause a prolonged QT interval on an ECG?

Which ECG finding is characteristic of ventricular fibrillation?

Which medication is commonly used to terminate supraventricular tachycardia by blocking AV nodal conduction?

What is the term for an ECG finding characterized by a gradual, progressive increase in the PR interval until a QRS complex is dropped?

Which condition is characterized by episodes of rapid heart rate originating above the ventricles with a narrow QRS complex on ECG?

In which type of heart block does the PR interval progressively lengthen until a QRS complex is dropped?

What is the term for an ECG pattern characterized by ST-segment elevation in leads V1-V3 with a right bundle branch block pattern?

In which ECG lead would you typically observe Q waves if there is an old myocardial infarction involving the inferior wall of the heart?

Which ECG lead placement is most useful for detecting acute myocardial infarction involving the anterior wall of the heart?

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