For a 57-year-old woman, the blood pressure is required to be between 90-140mmHg systolic and 60-90mmHg diastolic, that is, the patient’s daily life without strenuous physical activity, daily life to ensure that the blood pressure is within this range can be. However, the normal blood pressure of human beings has certain fluctuations every day, in the morning and afternoon there are two peak states of blood pressure, and in the night to the early morning there is a trough period of blood pressure, so there are certain fluctuations in blood pressure. To ensure that the average daily blood pressure, in the 120/80mmHg can be, can minimize the blood pressure on the heart, brain, kidneys and other important organs of the damage. However, if there is a combination of carotid artery stenosis, as well as ischemic cerebrovascular disease, etc., then the blood pressure can not be controlled too low, and needs to be controlled at about 140/90mmHg in order to ensure effective cerebral blood supply and avoid aggravation of ischemic cerebrovascular disease.