What causes constrictive pericarditis?

Written by Han Shun Li
Pulmonology
Updated on September 05, 2024
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Constrictive pericarditis refers to the fibrosis or calcification of the pericardium, which restricts the filling of the ventricles during diastole and leads to a series of symptoms. What causes constrictive pericarditis? Generally, constrictive pericarditis is secondary to acute pericarditis. In our country, the most common cause of constrictive pericarditis is tuberculous pericarditis, followed by purulent or traumatic pericarditis. A minority of constrictive pericarditis cases may be associated with tumors of the pericardium, acute nonspecific pericarditis, and radiation-induced pericarditis, among others. Of course, some patients have idiopathic constrictive pericarditis.

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Written by Tang Li
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What are the infectious causes of pericarditis?

The causes of pericarditis include the following types: first, acute nonspecific; second, tumors; third, autoimmune disorders; fourth, metabolic diseases; fifth, physical factors such as trauma and radiation; sixth, diseases of adjacent organs and tissues, such as acute myocardial infarction, pleurisy, aortic dissection, pulmonary embolism, etc. The infectious causes of acute pericarditis mainly include viruses, bacteria, fungi, parasites, and rickettsiae. Common types of pericarditis include tuberculous pericarditis and purulent pericarditis.

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How is acute pericarditis classified?

Acute pericarditis is classified according to the course of the disease, including acute fibrinous pericarditis and acute exudative pericarditis. If classified according to the cause, it can be divided into infectious pericarditis and non-infectious pericarditis. Infectious pericarditis can be caused by viruses, bacteria, tuberculosis, fungi, etc., while non-infectious pericarditis can be seen in tumors, uremia, acute myocardial infarction, aortic dissection, connective tissue disease, trauma, and cardiac surgery, etc. Acute pericarditis is an acute inflammatory disease of the pericardium's parietal layer, and its occurrence requires timely diagnosis. It is also important to further clarify the specific cause of acute pericarditis and actively treat it.

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Written by Xiong Hong Hai
Infectious Disease
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Tuberculous pericarditis differential diagnosis

The differential diagnosis of tuberculous pericarditis requires differentiation from other types of pericardial inflammation, such as bacterial pericarditis and nonspecific infections that lead to cellular inflammation of the pericardium. In addition to infections that can cause pericarditis, other infectious diseases such as subacute endocarditis and infections caused by other microbes can also lead to pericarditis. Furthermore, some rheumatic autoimmune diseases can also present with pericarditis. It is necessary to perform pericardiocentesis and fluid examination to determine the specific cause.

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Written by Liu Ying
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acute pericarditis clinical manifestations

The clinical manifestations of acute pericarditis include symptoms and signs. The symptoms of acute pericarditis are pain behind the sternum and in the precordial region, which often occurs during the fibrinous exudative phase of inflammation. The pain can radiate to the neck, left shoulder, left arm, and even the upper abdomen. The nature of the pain is sharp, related to respiratory movements. As the condition progresses, the pain can disappear and be replaced by difficulty breathing. Some patients may develop significant pericardial effusion leading to cardiac tamponade, resulting in symptoms such as difficulty breathing, edema, and other related symptoms. During acute pericarditis, the most diagnostically valuable sign is the pericardial friction rub, typically located in the precordial area. A typical friction rub can be heard consistent with atrial contraction, ventricular contraction, and ventricular relaxation, known as a triphasic friction rub, and so on.

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Constrictive pericarditis clinical manifestations

Patients with constrictive pericarditis often have a history of pericarditis, pericardial effusion, malignant tumors, and other diseases. Some patients have an insidious onset with no obvious clinical symptoms in the early stages. The main symptoms can include palpitations, exertional dyspnea, decreased exercise tolerance, fatigue, enlarged liver, pleural effusion, abdominal effusion, and edema of the lower limbs. Patients with constrictive pericarditis commonly present with elevated jugular venous pressure, and often have a reduced pulse pressure. Most patients exhibit a negative apical beat during systole, with a commonly faster heart rate. The rhythm can be sinus, atrial, or ventricular, with premature contractions possible, as well as Kussmaul's sign. In the late stages, muscle atrophy, cachexia, and severe edema can occur.