The severity of thyroid disorders depends on the type of disorder, with more serious disorders such as thyroid crisis and hyperthyroid heart disease. Thyroid diseases are divided into many kinds, not all thyroid diseases are very serious, at present, the more common clinical thyroid diseases, there are hyperthyroidism, hypothyroidism and thyroid tumors, etc., of which thyroid crisis, hyperthyroidism heart disease as a complication of hyperthyroidism, is one of the more serious types. Thyroid crisis is characterized by elevated body temperature and involves the central nervous system, circulatory system and digestive system. Hyperthyroidism is a heart disease caused by the thyroid gland producing excessive amounts of thyroid hormones. Its main clinical manifestations include arrhythmia, heart enlargement, heart failure, etc. This complication caused by thyroid disease is still very serious. If you have found that your thyroid gland has problems, you should go to the endocrinology department of the hospital in time, and under the guidance of the doctor for standardized treatment.