Complete left bundle branch conduction block is mainly due to insufficient blood supply to the left coronary artery, and this condition still needs to be considered a coronary heart disease. If the heart has insufficient blood supply, angina pectoris or myocardial infarction may occur, but if the left bundle branch conduction block is simple and the clinical symptoms are not obvious, it can be conservatively observed and the electrocardiogram can be reviewed regularly. Most of the complete left bundle branch block is pathological, and in young people it is more common in cardiomyopathy, rheumatic heart disease, myocarditis, congenital heart disease, etc. Because there is only one right bundle branch left, complete atrioventricular block is likely to occur, and a pacemaker will have to be installed at this time. In addition, in some normal people, the left bundle branch is not completely blocked, but the conduction speed is slowed down or the induction period is relatively prolonged, which may appear as a complete left bundle branch block on the ECG, which is an illusion. It is recommended to go to the hospital for an electrocardiogram, if the heart is not sufficiently supplied with blood, it is recommended to take isosorbide mononitrate orally or intravenously under the guidance of a doctor, usually with aspirin, simvastatin, if the heart rate is around 50 times, it is recommended to add heart heart treasure, usually pay attention to low salt and low fat diet, eat less and more meals, avoid anger and emotional excitement, avoid strenuous activities, and pay attention to avoid getting cold when the seasons change. The main application of treatment is anti-angina, anti-cardiac pain, aspirin, simvastatin oral. It is recommended to go to the hospital to do a coronary angiography, if the stenosis is obvious, you can do stent intervention, and then if there is vasodilation and antiplatelet lipid-lowering medication. Warm tips: suffer from this disease usually must pay attention, do not emotional excitement, but also optimistic, shall not be anxious anxiety, usually still pay attention to a light diet, a small number of meals; appropriate exercise, bowel movement; stable emotions.