The blood pressure of 80 year olds is considered to be a symptom of arteriosclerosis or hypertension in the elderly. 80 year olds’ blood vessel function will deteriorate, and the hardening of the arteries in the center of the blood circulation will slow down the speed of the blood, and the lowering of the function of the blood vessel will lead to a reduction in the capacity of the blood vessel to withstand the prolonged period of time, which will lead to infarction, affecting the circulation of the blood, and leading to the blood pressure being suddenly high or suddenly low. Elderly people suffering from high blood pressure will cause the blood flowing through the heart to speed up temporarily and then slow down, resulting in large or insufficient blood supply to the myocardium, triggering high and low blood pressure. Elderly people suffering from irregular heart rate, heart failure and other heart diseases will cause the heart to pause for a short period of time or premature beats, thus affecting the normalization of blood pressure, when the elderly have unstable blood pressure need to measure the blood pressure and pay more attention to observation.