Thoracoscopic cardiac surgery mainly refers to the surgical treatment of heart diseases under the thoracoscope. It is the latest and so far more difficult thoracoscopic technique. At present, this technology of cardiac surgery in Qilu Hospital of Shandong University is in the international leading position! Inheriting the characteristics of thoracoscopic surgery, TV thoracoscopic cardiac surgery is mainly performed through two to three “keyholes”, with the assistance of video-assisted surveillance to complete cardiac surgery instead of traditional open-heart surgery. The essence is to use “lumpectomy” to do surgery (or lumpectomy surgery), which has the technical characteristics of less trauma, faster recovery, and shorter hospitalization compared to traditional open surgery, and its essence is the same as the principle of open surgery, but changes the traditional surgical access, separation steps, ligation and suturing methods, and the way of observation during surgery (from direct naked eye observation to endoscopic observation). direct visual observation to transendoscopic observation).