A 54-year-old man is transferred to the hospital from his cardiologist's office due to atrial fibrillation with rapid ventricular response. His symptoms began 24 hours earlier with palpitations, lightheadedness, and chest tightness. The patient has had similar episodes several times during the last year. Past history is notable for mitral valve repair 3 years ago for severe symptomatic mitral regurgitation. The patient undergoes direct current cardioversion due to worsening hemodynamic instability, with resolution of the arrhythmia and all associated symptoms. He is considered for long-term amiodarone therapy to prevent future arrhythmic episodes. Which of the following should be tested before initiating this medication?

Question

A 54-year-old man is transferred to the hospital from his cardiologist's office due to atrial fibrillation with rapid ventricular response.  His symptoms began 24 hours earlier with palpitations, lightheadedness, and chest tightness.  The patient has had similar episodes several times during the last year.  Past history is notable for mitral valve repair 3 years ago for severe symptomatic mitral regurgitation.  The patient undergoes direct current cardioversion due to worsening hemodynamic instability, with resolution of the arrhythmia and all associated symptoms.  He is considered for long-term amiodarone therapy to prevent future arrhythmic episodes.  Which of the following should be tested before initiating this medication?

Quizplus · Accepted Answer

The Answer is F

A 54-Year-Old Man Is Transferred to the Hospital from His