Recognize appropriate therapy for hypothyroidism in a patient who also has angina.   

Explanation:

In the beginning, for patients with coronary disease, start with a low dose of thyroxine- either 12.5 or 25 micrograms or else one can precipitate angina. Then gradually advance the dose(every 2 weeks -increase dose by 12.5--25 micrograms).

On the other hand when a patient is in myxedema coma the doses used are high and most importantly for them you should administer steroids prior to the thyroxine- not because their adrenals have failed but because the adrenal becomes underactive because of the low basal metabolic rate and cannot cope with the suddenly increased metabolic rate that occurs due to initiation of thyroxine therapy.