Pericardial effusion is a condition in which a large amount of fluid is present in the pericardial cavity. At this time, if not detected in time or the rate of fluid formation is too fast, it can easily lead to acute cardiac tamponade, causing hemodynamic disturbances, ranging from cardiovascular collapse, mild hypotension to severe cardiogenic shock or death. Therefore, early diagnosis and active intervention are essential to help ensure the patient's life.