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Medicine Practice MCQs

Browse 18,554 high-yield clinical questions in Medicine. Includes detailed explanations, options, and topic tags.

#3163 General

A 47 year old man presents to the hospital complaining of palpitations. The patient repos that while cooking breakfast this morning, he felt his hea "racing in his chest" and was unable to catch his breath. He states that sitting down brought no relief. He called for an ambulance and he was brought to the emergency depament. The man has no significant past medical history and takes no medications regularly, other than ranitidine for occasional heaburn. On examination, the patient is quite thin, but well developed and in mild distress. His globes appear exophthalmic. His pulse is 140/min and irregularly irregular. There are no murmurs, and the lung examination is clear. A non-tender midline thyroid mass is palpable. Which of the following findings on his echocardiogram would suggest a diagnosis of long- standing atrial fibrillation?

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#3175 Respiratory

A 64-year-old woman is admitted to the hospital after the acute onset of left-sided weakness. She has had a large right cerebral stroke and is confined to bed. On the fifth hospital day, her oxygen saturation is noted to be reduced to 90% on room air. She feels fine, the neurologic weakness is unchanged, blood pressure is 130/90 mm Hg, and pulse 80/min. Examination of the chest reveals decreased fremitus, dullness to percussion, and absent breath sounds in the left lower lung. There is also a tracheal shift towards the left side.For the above patient with abnormal pulmonary physical findings, select the most likely diagnosis.

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#3196 Infection

A 73-year-old man from a nursing home develops headache, fever, cough, sore throat, malaise, and severe myalgia during a community outbreak affecting numerous other residents at the home. The symptoms gradually resolve after 3 days, and he starts feeling better but then there is a reappearance of his fever, with cough and yellow sputum production. On examination, his temperature is 38.5degC, pulse 100/min, respiration 24/min, oxygen saturation 88% and crackles in the right lower lung base, bronchial breath sounds and dullness on percussion. CXR reveals a new infiltrate in the right lower lobe. Which of the following is the most likely causative organism?

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