The reform of the way physicians work was started from April 2024. Restrictions on doctors' working hours is expected to be difficult to achieve the level required by the government. U40 Kyushu-Okinawa Branch conducted a questionnaire survey of young cardiovascular surgeons nationwide on their working conditions. While some institutions have taken measures such as streamlining doctors' work and shifting tasks, others seem to have made a few change to their previous work content. The reform of work styles of cardiovascular surgeons requires not only individual improvement of work styles, but also efforts by cardiovascular surgeons as a one team, including department heads and facility directors, and requires the involvement of academic societies and governments.

Post-myocardial infarction ventricular septal perforation (VSP) is one of the lethal complications of transmural myocardial infarction. Although the treatment of VSP mostly requires surgical procedures using heterologous pericardium, thromboembolism rarely occurs in patients who undergo VSP repair. Herein we report the case of a patient who died of sudden massive cerebral infarction two weeks after the surgery. The autopsy findings revealed concaved mural LV thrombus in the dissected heart. It is suspected that the patient died of extensive cerebral infarction due to thromboembolic occlusion of the carotid or central cerebral artery. In the postoperative period after VSP repair, several risk factors for thrombus formation may occur, such as postoperative hypercoagulability due to systemic inflammation by the high operative invasiveness, the presence of foreign material in the impaired left ventricle, or pericardial patch suturing methods. Our clinical experience indicates that meticulous postoperative management may be needed, keeping LV thrombus formation in mind after VSP repair.