Regular heart beat is one of the important factors in maintaining normal blood pressure. When there is a problem with the heart, some patients have normal blood pressure and some do not. In the case of ordinary patients with coronary artery disease or angina pectoris and no previous history of hypertension, blood pressure is usually normal and patients do not experience sudden fluctuations in blood pressure or suddenly develop hypertensive disease. If the blood pressure is suddenly abnormal, when there is a sudden large drop, most patients have underlying heart disease, and then suddenly will have acute cardiac insufficiency. Especially in patients with acute left heart failure, in the middle and late stages, the patient will have cardiogenic shock, when the blood pressure will continue to fall, falling below 90mmHg, and lasting for a long time. At this time, the appropriate disposition should be given, the treatment of the primary disease at the same time, give the symptomatic treatment to correct cardiogenic shock.