Early manifestations of ischemic contracture: weakening or elimination of the radial artery pulsation, flexion of the fingers and wrist, inability to extend the fingers (thumb) and wrist automatically, and restriction of passive movement and pain. Numbness, coldness or swelling of the hand and forearm, if not treated immediately, muscle necrosis and scar contracture will occur. X-ray examination 1, the size and shape of the heart shadow provide important reference information for the diagnosis of the cause of contracture, and indirectly reflect the functional status of the heart according to the degree of enlargement and dynamic changes. 2.The presence or absence of pulmonary stasis and its degree directly reflect the state of cardiac function. In the early stage of increased pulmonary venous pressure, it is mainly manifested by the enhanced vascular shadow of the pulmonary hilum, and the increased vascular shadow of the upper lung is similar to or even more dense than the texture of the lower lung. Due to the increased pulmonary artery pressure seen in the lower pulmonary artery widening, further interstitial pulmonary edema can blur the lung field. KerleyB line is a horizontal linear shadow clearly visible on the lateral side of the lung field, which is a manifestation of fluid accumulation in the lung lobular septum and is a characteristic manifestation of chronic pulmonary stasis. In acute alveolar pulmonary edema, the hilum is butterfly-shaped, and a large fused shadow is visible in the lung field. Echocardiography 1. It provides more accurate information on the changes in the size of each heart chamber and the structure and function of the heart valves than X.