If the left adrenal gland is removed and the other adrenal gland functions normally, it usually has little effect on the heart; if the other adrenal gland functions abnormally, it may affect the heart function. 1. Will not affect: The physiological function of adrenal gland is to secrete adrenocorticotropic hormone to promote body metabolism. There are two adrenal glands in the human body. After removing one adrenal gland, if the other adrenal gland is functioning normally, one adrenal gland can play its normal physiological role, and it will not affect the heart in general. 2. It will affect: if the healthy side of the adrenal gland functions abnormally, it may cause low adrenal function, electrolyte disorders, affecting blood pressure, such as hypotension, low blood potassium and so on, thus affecting the function of the heart. Before thyroidectomy, it is necessary to prepare for the appropriate examination, pay attention to nursing care after the operation, and give adrenocorticotropic hormone drugs if necessary.