Most patients with hypertension have predominantly elevated low pressures, and patients tend to have significantly higher high pressures, while low pressures can be either normal or elevated. If a patient with hypertension has a particularly high high pressure and a particularly low low pressure, there are two possibilities. First, changes caused by atherosclerosis, often seen in elderly patients, elderly patients due to the degree of atherosclerosis is relatively heavy, often manifested as low pressure is very low. Second, the pathological state, causing high blood pressure in hypertensive patients with particularly high low pressure disease, mainly aortic valve closure insufficiency and hyperthyroidism, these two such diseases are the most common, so hypertensive patients with this condition, should check the heart ultrasound and thyroid function.