The left atrium and left ventricle are slightly larger than the left atrium and left ventricle. When the left atrium and left ventricle do not have any clinical manifestations in the early stage, although it is not too serious, but it needs to be paid attention to and paid attention to, and if the symptoms of heart failure appear in the late stage, it is generally more serious. 1. Early enlargement of the left atrium and left ventricle: In the early stage, the left atrium and left ventricle may not show any uncomfortable symptoms, and generally will not be life-threatening, but also need to pay attention to avoid further enlargement of the left atrium and left ventricle, and the symptoms of heart failure. 2. Late enlargement of the left atrium and left ventricle: in the late stage, the left atrium and left ventricle can be further expanded and enlarged, and may show symptoms of heart failure, such as bilateral lower extremity edema, ascites, pleural effusion, dyspnea, coughing and sputum and other uncomfortable symptoms, which may be life-threatening. If any of the above symptoms occur, or if the left atrium and left ventricle are further enlarged, seek medical attention for treatment.