Cardiology Quiz #30: Tachyarrhythmias

1. A 24-year-old woman presents to the emergency department with palpitations and lightheadedness. Her heart rate is 180 beats per minute. An ECG shows a narrow QRS complex and no visible P waves before each QRS complex. Which of the following is the most likely diagnosis? 

Question 1 of 5

2. A 56-year-old man with a history of chronic obstructive pulmonary disease presents to the clinic complaining of irregular palpitations for the past few hours. His pulse is irregularly irregular, and his ECG shows no discernible P waves with a variable ventricular response. What is the most likely diagnosis? 

Question 2 of 5

3. A 35-year-old woman is referred to a cardiologist for evaluation of palpitations. She reports that the episodes are sudden in onset and termination. An ECG during an episode reveals a regular rhythm with a heart rate of 160 beats per minute and a "sawtooth" pattern of atrial activity. Which of the following is the most likely diagnosis? 

Question 3 of 5

4. A 46-year-old man with a history of myocardial infarction is seen in the clinic for evaluation of a recent episode of palpitations accompanied by dizziness. An ECG shows a wide QRS complex tachycardia with a rate of 170 beats per minute. Which of the following is the most likely diagnosis? 

Question 4 of 5

5. A 30-year-old man presents to the emergency department with a rapid heartbeat. He appears anxious but is hemodynamically stable. An ECG demonstrates a narrow QRS complex tachycardia with a retrograde P wave visible just after each QRS complex. Which of the following is the most likely diagnosis? 

Question 5 of 5


 

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