A 62-year-old man on ICU develops myxoedema coma. He is hypothermic (33°C), bradycardic (HR 40), hypotensive (BP 75/45), and comatose. TSH is 85 mU/L (elevated), free T4 is 2 pmol/L (very low). What is the immediate treatment?AOral levothyroxine 25 mcg daily - start low and go slowBIV levothyroxine (T4) loading dose 200-500 mcg followed by daily IV doses, PLUS IV liothyronine (T3) 5-20 mcg for faster onset, PLUS IV hydrocortisone 100 mg QDS (must be given BEFORE or WITH thyroid hormone replacement to prevent precipitating adrenal crisis)COral liothyronine onlyDActive rewarming to 37°C immediatelyENo specific treatment - supportive care onlyCheck my answer