Unstable blood pressure may be caused by hypertension patients’ complication of coronary heart disease, angina pectoris and other heart diseases, and ECG, cardiac ultrasound and other related examinations can be conducted to exclude disease factors. 1. Electrocardiogram can observe the condition of the heart, if it shows elevation of ST segment, inversion of T wave, etc., it indicates that hypertensive patients may be complicated with coronary heart disease. If the patient is in the state of angina pectoris attack, at this time to carry on the electrocardiogram examination, can also be able to see the ST segment and T wave abnormal changes. 2. Cardiac ultrasound is a commonly used clinical means of checking the heart, which can assist in the diagnosis of coronary heart disease and further understand the patient’s heart form and function. At the same time, cardiac color ultrasound cardiac color ultrasound can see the segmental dyskinesia that occurs at the site of myocardial ischemia of the patient, which provides a basis for the diagnosis of angina pectoris. In addition, unstable blood pressure may also be caused by mental tension and anxiety, irregular medication and other factors, should first carry out the relevant examination, exclude disease factors, and then cooperate with the doctor to adjust the medication, and strictly follow the doctor’s instructions to take medication.