A 29 year old lady came to the ED with complaints of palpitations that have been there for the past 4 days and also feeling warmer than usual. Exam: HR=154bpm, irregular rhythm. What is the treatment for her condition?

The key is B. Beta blockers [The probable arrhythymia is AF secondary to thyrotoxicosis. Some of the symptoms of hyperthyroidism (such as tremor and palpitations, which are caused by excess thyroid hormone acting on the cardiac and nervous system) can be improved within a number of hours by beta- blockers. So to rapid control the symptoms of thyrotoxicosis Beta blocker should be used which will improve the arrhythmia as well].