On the basis of 1 hyperthyroidism, a series of symptoms such as arrhythmia, enlargement and heart failure are revealed, accounting for about 5 ~ 10 of hyperthyroidism patients. Rheumatic disease, myocarditis, coronary heart disease and hypertension are two different concepts. The former is hyperthyroidism and then reveals the symptoms of its disease, while the latter has its personality before suffering from hyperthyroidism, because the disclosure of hyperthyroidism can aggravate the original. 2. Arrhythmia, atrial premature beat is the most common, followed by atrial fibrillation, and atrial flutter, paroxysmal supraventricular tachycardia and atrioventricular block can be seen. Hyperthyroidism patients have a long course of disease and serious illness. Due to the spread of high excretion, the load is aggravated, which can be aggravated. Heart failure can be caused by arrhythmia and its increase. As for hyperthyroidism, it is rare. 3. The onset of this disease is the result of multiple factors, such as excessive thyroid hormone, accelerated myocardial metabolism, myocardial anoxia and malnutrition, myocardial degeneration and enrichment, shortened atrioventricular conduction time and atrial cell refractory period, coronary artery spasm and hemodynamic changes. At present, there is no unified diagnostic standard. It is considered that arrhythmia, enlargement and heart failure are necessary symptoms and signs, but other reasons are excluded.