Blood pressure levels are strongly associated with stroke and coronary events. There is also a causal relationship between blood pressure levels and the occurrence of heart failure. Clinical follow-up data show that the incidence of heart failure increases with increasing blood pressure levels, and that heart failure and stroke are the two complications most closely associated with blood pressure levels. Chronic hypertension-left ventricular hypertrophy-heart failure constitutes an important chain of events. Hypertension mainly leads to heart failure with preserved ejection fraction; heart failure with reduced ejection fraction can also occur if combined with myocardial infarction in coronary artery disease. 1, Hypertension is an important cause of the occurrence of AF. Hypertension-atrial fibrillation-cerebral embolism constitutes an important and easily neglected chain of events. 2, High blood pressure can cause lesions in the heart, brain, kidneys, blood vessels, and fundus of the eyes. 3.Healthy arteries are elastic and have smooth inner walls, in which blood flows smoothly and supplies sufficient blood to organs. If blood pressure is high and ignored, the arterial wall is under great pressure and prone to atherosclerosis. High blood pressure combined with high blood pressure is very likely to cause atherosclerosis. 4.Atherosclerosis narrows the lumen of blood vessels and causes insufficient blood flow. Heavy narrowing of blood vessel lumen or thrombosis will lead to blockage of blood vessels and interruption of blood flow, which will cause myocardial infarction if it occurs in the heart and cerebral thrombosis if it occurs in the brain. And if a blood vessel that has lost its elasticity and become brittle and hardened ruptures under high pressure, cerebral hemorrhage or aortic coarctation can occur. Some of these complications are very dangerous and often life-threatening. Heart: Hypertension can cause left ventricular hypertrophy, coronary artery disease, heart failure and arrhythmias. The risk of coronary artery disease is 2.6 times higher in patients with hypertension than in those with normal blood pressure. Brain: Stroke, commonly known as stroke, includes cerebral infarction and cerebral hemorrhage. Hypertension is the most important risk factor for stroke, and 70% of stroke patients in China have hypertension. Kidney: Long-term hypertension is prone to kidney damage and hyperalgesia, and some patients may develop renal failure. Vascular: Aortic coarctation is the most serious vascular complication, the condition is very dangerous, can be accompanied by shock, and even sudden death. Eye: Severe hypertension can lead to sclerosis of small retinal arteries in the fundus, retinal hemorrhage and exudation, and blockage of the central retinal artery or vein, resulting in vision loss and, in severe cases, blindness. Hypertension has numerous comorbidities, so timely detection and treatment is very important.