When the heart contracts, the anterior wall of the left ventricle strikes the chest wall in the precordial region early in systole, causing the corresponding part of the rib question tissue to pulsate outward, called apical pulsation. After myocardial infarction of the left ventricle, the entire myocardium of the ventricular wall is necrotic. In about 10-38% of cases, the necrotic myocardium is gradually replaced by fibrous scar tissue, forming a ventricular wall tumor. The thin layer of the ventricular wall in the lesioned area bulges outward, and the heart loses mobility or shows paradoxical motion during contraction. The evolution of coronary artery obstruction, myocardial infarction, myocardial fibrosis and left ventricular ventricular wall tumors was well understood as early as 1881. The examination of reversed beats caused by double outlet of the left ventricle: 1. ECG findings commonly include enlarged heart shadow and left ventricular hypertrophy. 2. Selective left ventriculography findings are seen with simultaneous visualization of both great arteries. 3. Right heart catheterization and cross-sectional echocardiography are the main diagnostic methods for this disease. 4.Blood gas analysis results may reveal almost equal oxygen saturation in the aorta and pulmonary artery.