Hypertension is a common disease nowadays, the damage of hypertension mainly affects the target organs, the target organ is commonly the heart, ECG is the means to check the heart. The effects of ECG on the heart through hypertension patients are manifested in the following three aspects: 1. For example, right bundle branch, left bundle branch block, various types of premature beats, atrial premature, ventricular premature and other types of premature beats. Other types of block, such as atrioventricular block and intraventricular block, are common manifestations of cardiac damage caused by hypertension. The ECG of a hypertensive patient can be used to roughly determine the patient’s history of hypertension, the extent of the current damage to the heart from hypertension, and the patient’s prognosis, all of which can be diagnosed through the ECG. In the case of hypertensive patients, regular ECG tracing is required to evaluate the current status of hypertension.