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A 37-year-old woman comes to the Emergency Department with high fever, tachycardia, and a goiter. Which of the following is the most likely diagnosis? 

Phosphodiesterase-5 (PDE-5) inhibitors can enhance the hypotensive effects in patients taking which of the following medications? 

Which of the following heart failure symptoms is most consistent with failure of the left ventricle?

Which of the following correlates with a higher risk of malignancy in a patient with a thyroid nodule?

A 63 year-old, previously healthy, male presents 5 hours after a 5-minute episode of exertional substernal chest pressure relieved by rest and one of his brother’s nitroglycerin tablets.  He had associated shortness of breath but no diaphoresis.  It was his first episode and the patient has no past medical history of cardiac problems.  In the emergency room, the heart and lung exams, serial EKG and cardiac enzymes are within normal limits.  Which of the following tests would be best at evaluating his symptoms further?

Which of the following agents is the BEST choice to initiate in a patient with a history of heparin-induced thrombocytopenia (HIT)?

A patient who receives chronic hemodialysis is admitted to the hospital with a potassium of 7.6mEq/L.  Which of the following actions is the MOST appropriate?

Which of the following is the mechanism of action for Mirabegron (Myrbetriq), an agent used for urinary incontinence?

Which of the following is the best interpretation of the lab results below?   HBsAg positive HBcAb IgM positive HBsAb negative

A 65 year-old male presents to the office with chest pain.  For the past 2 years, he experienced the same pain about once every 2 months.  Although the pain was brought on by exertion, it had always relieved completely with rest after a few minutes.  In the past week, he has had 3 episodes of the same pain, but the most recent episode this morning lasted 10 minutes and didn’t resolve completely. What is the next step in evaluation of this patient?