Valve thickening is mainly caused by heart valve disease. Heart valve disease is a heart disease in which the heart valves lose their one-way valve function due to thickening, deformation, adhesions, calcification and rupture. Heart valve disease can cause stenosis or incomplete closure of the heart valves, so that blood cannot flow through or flow through and then back up. The most common is mitral valve lesion, followed by aortic valve lesion. What tests should be done in patients with valve thickening? 1, X-ray examination: left atrial enlargement (right anterior oblique barium swallow fluoroscopy, visible esophageal pressure traces, protruding pulmonary artery segment, heart shadow is pear-shaped, pulmonary hilar shadow enlarges and thickens. 2.Electrocardiogram examination: “mitral valve criminal P wave”, that is, P wave widening with notch; right ventricular hypertrophy with strain, common Pavl>1.0mV, RavR.0.5mV.