If a patient has pericardial effusion, they may experience pain in the precordial area, as well as symptoms of chest tightness, breathing difficulties, and palpitations. A small amount of pericardial effusion can be completely absorbed on its own; however, a large amount of pericardial effusion can sometimes lead to breathing difficulties. For treatment, a pericardiocentesis can be performed to examine the fluid, as this condition is very dangerous. In cases of pericardial effusion, I personally suggest undergoing a cardiac echocardiogram or a chest CT scan for a more definitive diagnosis. During this period, it is still important to actively monitor the patient's blood pressure, heart rate, and pulse changes. If there is a very high heart rate or other complications, active treatment should be pursued.