Left ventriculectomy, or left ventricular decompensation, also known as partial left ventriculectomy and prescriptive left ventriculectomy, is a surgical procedure to treat end-stage dilated cardiomyopathy. Left ventriculectomy is mainly applicable to various dilated cardiomyopathies such as valvular disease and coronary artery disease, etc. This surgery is mainly used to solve the problem of end-stage heart enlargement through a series of operations to temporarily reduce the symptoms of congestive heart failure. Left ventriculectomy is a kind of palliative surgery, the surgical operation only removes the myocardium which has no contractile ability, and does not improve the function of myocardium, so the long-term therapeutic effect of this surgery is poor, but this treatment can reduce the pressure of the pulmonary artery, and create the conditions for transplantation. Postoperative complications of this procedure are more frequent, and the need for left ventriculectomy treatment should be decided after a comprehensive evaluation by a specialized physician.