Constrictive pericarditis is a medical condition characterized by the inflammation and fibrosis of the pericardium, the thin sac surrounding the heart. This condition leads to the thickening and stiffening of the pericardial layers, restricting the heart's ability to expand and fill with blood during diastole. As a result, the heart's pumping efficiency is compromised, leading to symptoms such as fatigue, shortness of breath, and fluid retention. Constrictive pericarditis can be caused by various factors, including viral or bacterial infections, previous heart surgery, or chronic inflammatory conditions. Diagnosis often involves a combination of clinical evaluation, imaging studies such as echocardiography, and sometimes invasive procedures like cardiac catheterization. Treatment typically involves addressing the underlying cause, along with managing symptoms through medications or, in severe cases, surgical intervention to remove or repair the constricting pericardium. Early detection and appropriate management are crucial for improving outcomes and preventing complications in individuals with constrictive pericarditis.