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Acute hypotension developed in a 63-year-old man during coronary-artery bypass graft surgery. On awakening from surgery, he reported a severe headache and lightheadedness. Four hours later, he was noted to have ptosis of the left eye with an inability to adduct or abduct the eye, indicating palsies of left cranial nerves III and VI (Panel A). Tests of serum showed the following levels: free thyroxine, 0.7 µg per liter (9.0 pmol per liter; normal range, 0.9 to 1.8 µg per liter [11.6 to 23.2 pmol per liter]); testosterone, 35 ng per deciliter (1.2 nmol per liter; normal range, 241 to . . . [Full Text of this Article] |