Sample Questions and Answers
- Which of the following EKG findings is characteristic of atrial fibrillation?
- A) Wide QRS complex
- B) Irregularly irregular rhythm
- C) P waves are visible
- D) QRS complexes are absent
- Answer: B) Irregularly irregular rhythm
- What is the hallmark of ventricular tachycardia on an EKG?
- A) P wave before each QRS
- B) Fast, wide QRS complexes
- C) Shortened PR interval
- D) Absence of QRS complexes
- Answer: B) Fast, wide QRS complexes
- Which of the following is a sign of a third-degree AV block?
- A) Prolonged PR interval
- B) Regular P to QRS ratio
- C) No relation between P waves and QRS complexes
- D) T wave inversion
- Answer: C) No relation between P waves and QRS complexes
- What is the first-line treatment for atrial fibrillation with rapid ventricular response?
- A) Beta-blockers
- B) Anticoagulants
- C) Defibrillation
- D) Amiodarone
- Answer: A) Beta-blockers
- Which of the following is characteristic of a normal sinus rhythm?
- A) Heart rate 100-150 bpm
- B) Regular rhythm, P wave before each QRS
- C) P wave absent
- D) QRS complexes greater than 0.12 seconds
- Answer: B) Regular rhythm, P wave before each QRS
- In an EKG, what does the QRS complex represent?
- A) Atrial depolarization
- B) Ventricular depolarization
- C) Atrial repolarization
- D) Ventricular repolarization
- Answer: B) Ventricular depolarization
- What is the characteristic EKG finding in hyperkalemia?
- A) Tall, peaked T waves
- B) Prolonged QT interval
- C) Shortened PR interval
- D) Small P waves
- Answer: A) Tall, peaked T waves
- Which of the following is the most appropriate treatment for ventricular fibrillation?
- A) Administer atropine
- B) Cardioversion
- C) Defibrillation
- D) Lidocaine infusion
- Answer: C) Defibrillation
- What does a prolonged QT interval increase the risk of?
- A) Bradycardia
- B) Tachycardia
- C) Torsades de pointes
- D) Atrial fibrillation
- Answer: C) Torsades de pointes
- Which of the following is the most common cause of sinus bradycardia?
- A) Vagal stimulation
- B) Hyperthyroidism
- C) Drug overdose
- D) Increased sympathetic stimulation
- Answer: A) Vagal stimulation
- A prolonged PR interval on an EKG indicates which type of heart block?
- A) First-degree AV block
- B) Second-degree AV block Type I
- C) Second-degree AV block Type II
- D) Third-degree AV block
- Answer: A) First-degree AV block
- In an EKG strip, what does the T wave represent?
- A) Ventricular depolarization
- B) Atrial depolarization
- C) Ventricular repolarization
- D) Atrial repolarization
- Answer: C) Ventricular repolarization
- What is the primary treatment for supraventricular tachycardia (SVT)?
- A) Cardioversion
- B) Vagal maneuvers
- C) Epinephrine administration
- D) Defibrillation
- Answer: B) Vagal maneuvers
- What is the primary concern when assessing a patient with a third-degree heart block?
- A) Low blood pressure
- B) Bradycardia and reduced cardiac output
- C) Tachycardia
- D) Elevated heart rate
- Answer: B) Bradycardia and reduced cardiac output
- What is the classic appearance of “sawtooth” waves in an EKG?
- A) Atrial flutter
- B) Atrial fibrillation
- C) Ventricular fibrillation
- D) Sinus tachycardia
- Answer: A) Atrial flutter
- Which EKG finding is indicative of a myocardial infarction?
- A) ST segment depression
- B) Shortened PR interval
- C) ST segment elevation
- D) Inverted P waves
- Answer: C) ST segment elevation
- What does the U wave typically represent in an EKG?
- A) Ventricular depolarization
- B) Atrial depolarization
- C) Repolarization of the Purkinje fibers
- D) Ventricular repolarization
- Answer: C) Repolarization of the Purkinje fibers
- What is the primary treatment for atrial fibrillation with rapid ventricular response?
- A) Digoxin
- B) Anticoagulants
- C) Beta-blockers or calcium channel blockers
- D) Amiodarone
- Answer: C) Beta-blockers or calcium channel blockers
- What does a P wave represent on an EKG?
- A) Atrial depolarization
- B) Ventricular depolarization
- C) Ventricular repolarization
- D) Atrial repolarization
- Answer: A) Atrial depolarization
- Which EKG rhythm is characterized by an absent P wave and a wide QRS complex?
- A) Atrial fibrillation
- B) Premature ventricular complex
- C) Ventricular tachycardia
- D) Junctional rhythm
- Answer: C) Ventricular tachycardia
- Which of the following is a risk factor for developing atrial fibrillation?
- A) Hyperthyroidism
- B) Hypertension
- C) Coronary artery disease
- D) All of the above
- Answer: D) All of the above
- What is the purpose of administering atropine in the case of bradycardia?
- A) Increase heart rate
- B) Lower blood pressure
- C) Slow down conduction
- D) Decrease heart rate
- Answer: A) Increase heart rate
- What is the primary intervention for patients with symptomatic bradycardia?
- A) Amiodarone administration
- B) IV fluids
- C) Atropine administration
- D) External defibrillation
- Answer: C) Atropine administration
- What is the effect of digitalis toxicity on the heart rhythm?
- A) Sinus tachycardia
- B) Sinus bradycardia and AV block
- C) Ventricular fibrillation
- D) Atrial fibrillation
- Answer: B) Sinus bradycardia and AV block
- Which of the following is an indication for synchronized cardioversion?
- A) Ventricular fibrillation
- B) Atrial fibrillation
- C) Asystole
- D) Pulseless electrical activity
- Answer: B) Atrial fibrillation
- What does a prolonged QT interval indicate?
- A) Increased risk of sudden death from arrhythmia
- B) Increased risk of stroke
- C) Increased heart rate
- D) Decreased risk of arrhythmias
- Answer: A) Increased risk of sudden death from arrhythmia
- Which EKG rhythm is characterized by a “regularly irregular” pattern?
- A) Atrial fibrillation
- B) Ventricular tachycardia
- C) Premature atrial contractions
- D) Sinus arrhythmia
- Answer: D) Sinus arrhythmia
- What is a common cause of a U wave in an EKG?
- A) Hyperkalemia
- B) Hypokalemia
- C) Hypercalcemia
- D) Hypocalcemia
- Answer: B) Hypokalemia
- What is the primary cause of a myocardial infarction-related arrhythmia?
- A) Tissue ischemia
- B) Increased sympathetic tone
- C) Decreased parasympathetic tone
- D) Hypoxia
- Answer: A) Tissue ischemia
- Which of the following is a classic symptom of a PVC (Premature Ventricular Contraction)?
- A) Skipped heartbeat
- B) Increased heart rate
- C) Chest pain
- D) Low blood pressure
- Answer: A) Skipped heartbeat
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