IBHRE CEPs Practice Exam 5 With 100% Correct Answers

IBHRE CEPs Practice Exam 5 With 100% Correct Answers

1. What is the primary purpose of an electrophysiology study (EPS)?

• A) To assess heart rate variability
• B) To evaluate electrical conduction pathways and arrhythmias
• C) To measure cardiac output
• Answer: B) To evaluate electrical conduction pathways and arrhythmias
• Explanation: EPS is used to map the electrical conduction system of the heart and identify
specific arrhythmias for treatment planning.

2. Which of the following is a common symptom of atrial fibrillation?

• A) Chest pain
• B) Syncope
• C) Palpitations
• Answer: C) Palpitations
• Explanation: Atrial fibrillation often presents with palpitations due to irregular and rapid heart
rates.

3. What is the most common cause of premature ventricular contractions
(PVCs)?

• A) Ischemic heart disease
• B) Electrolyte imbalance
• C) Anxiety
• Answer: A) Ischemic heart disease
• Explanation: Ischemic heart disease is a leading cause of PVCs, which can occur due to
myocardial irritation or injury.

4. In a cardiac resynchronization therapy (CRT) device, which lead is typically
placed in the left ventricle?

• A) The atrial lead
• B) The right ventricular lead
• C) The coronary sinus lead
• Answer: C) The coronary sinus lead
• Explanation: The coronary sinus lead is positioned in the left ventricle to optimize pacing and
improve synchrony.

5. What does the term “reentry” refer to in cardiac arrhythmias?

• A) A single ectopic focus causing premature beats
• B) A circuit formed by abnormal conduction pathways

, • C) A failure of the AV node
• Answer: B) A circuit formed by abnormal conduction pathways
• Explanation: Reentry occurs when electrical impulses travel in a circular path, often due to a
combination of slowed conduction and unidirectional block.

6. Which medication is primarily used to manage atrial fibrillation by controlling
ventricular rate?

• A) Amiodarone
• B) Diltiazem
• C) Digoxin
• Answer: B) Diltiazem
• Explanation: Diltiazem is a calcium channel blocker effective in controlling ventricular rates
during atrial fibrillation by slowing conduction through the AV node.

7. What is the significance of the "escape rhythm"?

• A) It indicates ventricular pacing failure
• B) It serves as a backup when the primary pacemaker fails
• C) It prevents tachyarrhythmias
• Answer: B) It serves as a backup when the primary pacemaker fails
• Explanation: An escape rhythm occurs when the primary pacemaker fails, allowing secondary
pacemakers (like the AV node or ventricles) to take over.

8. What is the primary goal of catheter ablation in arrhythmia treatment?

• A) To replace medication
• B) To destroy ectopic foci causing arrhythmias
• C) To implant a permanent pacemaker
• Answer: B) To destroy ectopic foci causing arrhythmias
• Explanation: Catheter ablation targets and destroys abnormal electrical pathways or foci
responsible for arrhythmias, aiming for a cure or significant symptom reduction.

9. Which of the following is a typical finding in atrial flutter on an ECG?

• A) Irregularly irregular rhythm
• B) "Sawtooth" pattern in the inferior leads
• C) Prolonged QT interval
• Answer: B) "Sawtooth" pattern in the inferior leads
• Explanation: The characteristic "sawtooth" pattern, known as "F-waves," is typically seen in
leads II, III, and aVF in atrial flutter.

10. What does the term “tachycardia-induced cardiomyopathy” refer to?

• A) Heart failure due to chronic bradycardia
• B) Reduced heart function resulting from prolonged tachycardia