What is an arrhythmia?

• A normal variation in heart rate

• An alteration in normal heart rhythm

• A complete absence of heart activity

• A decrease in heart rate below 60 bpm

Which of the following is NOT a type of arrhythmia?

• Sinus

• Atrial

• Junctional

• Myocardial

Sinus arrhythmias originate from which part of the heart?

• AV node

• Atria

• SA node

• Ventricles

What is the normal heart rate range for normal sinus rhythm (NSR)?

• 40-60 bpm

• 60-100 bpm

• 100-150 bpm

• 150-200 bpm

Which of the following is NOT a sinus dysrhythmia?

• Sinus bradycardia

• Sinus tachycardia

• Atrial fibrillation

• Sinus arrest

Sinus bradycardia is characterized by a heart rate:

• Less than 60 bpm

• 60-100 bpm

• 100-150 bpm

• >150 bpm

Sinus arrest is defined as:

• The absence of three or more consecutive beats

• A regular rhythm with a slow heart rate

• A heart rate above 150 bpm

• A normal sinus rhythm with occasional pauses

Atrial arrhythmias originate from:

• The ventricles

• The AV node

• The atrial tissue or internodal pathways

• The Purkinje fibers

Which of the following mechanisms is NOT responsible for atrial dysrhythmias?

• Increased automaticity

• Triggered activity

• Reentry

• Ventricular delay

What is a characteristic feature of a Premature Atrial Contraction (PAC)?

• Wide QRS complex

• Missing P waves

• Early abnormal P wave

• Prolonged PR interval