Patient: Male, three and a half years old, 2012.3 Bilateral eyelid swelling with abdominal distension, cardiac ultrasound suggestive of bruised liver. A small amount of fluid in the pericardium, the presence of a small amount of ascites Packet fluid double atrial significantly enlarged (EF0.68), apical packet echoless dark area 1.38CM,left ventricular posterior wall 1.48CM right ventricular posterior wall 1. 09CM, electrocardiogram sinus rhythm, diagnosis of double atrial hypertrophy, right ventricular hypertrophy, ST-T changes, QT prolongation, hospitalized in the local children’s hospital for nine days, the hospital’s preliminary judgment of constrictive pericarditis? Restrictive cardiomyopathy? In 2012, we went to Shanghai for further examination of enhanced CT, ultrasound and electrocardiogram. The ultrasound findings: normal heart position connection, slightly widened inferior vena cava: inspiratory phase internal diameter 1.40 CM, expiratory phase internal diameter 1.02 CM, enlarged biventricles (left atrium 3.99 CM, right atrium 4.29 CM measured in apical four-chamber view), bilateral ventricular wall hypertrophy. The left ventricular systolic activity was acceptable. There is no widening of the aorta, the left coronary artery inner diameter is 0.23 CM, the right coronary artery is 0.02. There is no widening of the pulmonary artery, and the valve opening activity is acceptable. The atrioventricular valve is open and active. The atrial septum was intact. The interventricular septum is intact. Left aortic arch. Suggestions: biventricular hypertrophy, bilateral ventricular wall thickening, normal range of left heart systolic function. Ultimately, the doctor said he was leaning toward the possibility of cardiomyopathy, but he said he could not rule out pericarditis either. Currently at home, conservative treatment, eating two diuretics please doctor to give better advice, very grateful! The only way to know for sure is to do a pericardial or cardiac workup. The only solution is to perform a pericardial or myocardial biopsy, but it is difficult to get the parents’ approval, so the doctors are helpless. Since the clinical presentation is very similar, but the treatment is different, it is crucial to identify the two diseases clearly. After all, constrictive pericarditis can be cured by pericardial dissection, while restrictive cardiomyopathy simply has no cure unless a heart transplant is performed, which is unlikely to happen, so parents of such children need to think carefully about the need to cooperate with their doctors in further invasive tests to find out as much as possible about the cause of their child. I think the parents are currently under more pressure than the doctors. As for the diuretics that are currently being used, they can only relieve the symptoms, not the root cause of the problem, and the doctors cannot suggest a good treatment, which is where the limitations of medicine lie. Please understand and weigh the advice of this doctor.