Cardioplegia is also known as propranolol, hyperthyroidism heart rate of 90 beats / min to take propranolol, suffering from hyperthyroidism in elderly patients, cardiovascular disease patients also need to take propranolol to treat. Hyperthyroidism is a disease in which the thyroid gland produces too much thyroid hormone and causes increased excitability and hypermetabolism in the nervous, circulatory, digestive and other systems. Due to the excitatory effect of thyroid hormone on the circulatory system, patients with the disease can suffer from secondary heart failure, and therefore hyperthyroid patients with a heart rate of 90 beats per minute need to take Propranolol for treatment. Propranolol, a non-selective competitive inhibitor of adrenergic beta-blockers, is required for the treatment of older patients with hyperthyroidism, and patients with hyperthyroidism in combination with cardiovascular disease. If the diagnosis of hyperthyroidism is confirmed, follow your doctor’s instructions for treatment.