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Pericarditis
What are the clinical considerations for acute pericarditis?
The treatment and prognosis of acute pericarditis depend on the cause, as well as early diagnosis and correct treatment. For various types of pericarditis, such as those presenting with tamponade syndrome, pericardiocentesis should be performed to relieve symptoms. Tuberculous pericarditis, if not actively treated, can evolve into chronic constrictive pericarditis. Patients with acute nonspecific pericarditis and post-cardiac injury syndrome may experience recurrent pericarditis after their initial episode, which is the most challenging complication of acute pericarditis. Clinically, it presents similarly to acute pericarditis, with recurrent episodes months to years after the initial onset, accompanied by severe chest pain. Most patients can be treated again with high doses of non-steroidal anti-inflammatory drugs, slowly tapering to normal over several months. If ineffective, corticosteroid therapy may be administered. (Medications should be used under the guidance of a doctor according to specific circumstances.)
What are the types of pericarditis?
Pericarditis includes primary infectious pericarditis, as well as non-infectious pericarditis caused by related diseases, such as tumors, metabolic diseases, autoimmune diseases, and uremia. Based on the progression of the condition, pericarditis can also be divided into acute pericarditis, with or without pericardial effusion, chronic pericarditis, adhesive pericarditis, subacute exudative constrictive pericarditis, and chronic constrictive pericarditis. Clinically, acute pericarditis and chronic constrictive pericarditis are the most common.
Treatment of constrictive pericarditis
Constrictive pericarditis refers to a disease in which the heart is surrounded by a densely thickened fibrotic or calcified pericardium, restricting ventricular diastolic filling and producing a series of circulatory disorders, typically chronic in nature. In China, the most common cause of constrictive pericarditis is tuberculosis. Constrictive pericarditis is a progressive disease, and most patients will develop chronic constrictive pericarditis. At this stage, pericardiectomy is the only effective treatment method. It should be performed early to avoid complications such as cardiac cachexia, severe liver dysfunction, and myocardial atrophy, with surgery usually carried out after controlling the pericardial infection. For tuberculosis patients, anti-tuberculosis treatment should continue for one year after surgery.
Symptoms of acute pericarditis
Acute pericarditis is an acute inflammatory disease of the visceral and parietal layers of the pericardium, with the most common cause being viral infections. The hallmark of acute pericarditis is pain in the precardiac area behind the sternum. The nature of the pain is very sharp, typically occurring during the fibrinous exudation phase of inflammatory changes, caused by friction between the visceral and parietal layers of the pericardium. The pain can radiate to the neck, left shoulder, and even the upper abdomen. It is associated with respiratory movements and often worsens with coughing, deep breathing, or changing body positions. When fluid exudes into the pericardium, separating the visceral and parietal layers, the patient's pain may decrease or disappear. However, some patients may experience symptoms such as breathing difficulties and edema due to cardiac tamponade.
Pericarditis is caused by what?
Pericarditis refers to the inflammatory disease of the visceral and parietal layers of the pericardium. It can be classified according to its etiology into infectious, non-infectious, allergic, and immune pericarditis. Causes of infectious pericarditis include viral, purulent, tuberculous, and fungal pericarditis. Non-infectious pericarditis can be caused by acute myocardial infarction, uremia, tumors, trauma, aortic dissection, radiation, acute idiopathic, and sarcoidosis, among others. Causes of allergic or immune pericarditis include rheumatic, vasculitis, drugs, and more. Some patients remain undiagnosed after examinations and are categorized as having idiopathic pericarditis or nonspecific pericarditis.
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.
What are the symptoms of pericarditis?
Fibrinous pericarditis is primarily characterized by precordial pain, similar to that seen in acute nonspecific pericarditis and infectious pericarditis. Tuberculous or neoplastic pericarditis that develops slowly may not show obvious pain symptoms. The nature of the pain can be sharp and related to respiratory movements. It is often exacerbated by coughing, deep breathing, changing body position, or swallowing. The pain is located in the precordial area and may radiate to the neck, left shoulder, left arm, and left scapula, and can also reach the upper abdomen. The pain can be compressive and located behind the sternum. The most prominent symptom of exudative pericarditis is dyspnea, which may be associated with bronchopulmonary compression and pulmonary congestion. In severe cases of dyspnea, the patient may sit up to breathe, leaning forward, with rapid and shallow breathing and pale complexion. There may be hepatomegaly, as well as compression of the trachea and esophagus causing dry cough, hoarseness, and difficulty swallowing. Rapid pericardial effusion can lead to acute cardiac tamponade, presenting with significant tachycardia and decreased blood pressure. Reduced pulse pressure and increased venous pressure, if the cardiac output significantly drops, can lead to shock. If the fluid accumulates slowly, it could lead to subacute or chronic cardiac tamponade, characterized by systemic venous congestion and distended jugular veins.
Early symptoms of acute pericarditis
The early symptoms of acute pericarditis are pain, which is located behind the sternum or in the precordial area, typically seen in the fibrin exudative type of inflammation. This pain arises from the friction between the visceral pericardium and the parietal pericardium. The nature of the pain is very sharp and related to respiratory movement, commonly exacerbated by coughing, deep breathing, or swallowing. The pain can radiate to the neck, left shoulder, and left arm. As fluid accumulates in the pericardium and the two layers of the pericardium separate, the pain may decrease or disappear.
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.
What are the clinical considerations for acute pericarditis?
The treatment and prognosis of acute pericarditis mainly depend on the cause, and are also related to whether it is diagnosed and treated correctly early on. For various types of pericarditis, if constrictive syndrome occurs, pericardiocentesis should be performed immediately to relieve symptoms. In cases like tuberculous pericarditis, if not treated aggressively, it can usually progress to chronic constrictive pericarditis. Acute nonspecific pericarditis and post-cardiac injury syndrome may lead to recurrent attacks of pericarditis after the initial episode, known as recurrent pericarditis, with an incidence rate of about 20%-30%. This is one of the most difficult complications of acute pericarditis to manage. Clinically, it generally presents similar to acute pericarditis, with recurrent attacks months or years after the initial episode, accompanied by severe chest pain. Most patients should be treated again with high doses of non-steroidal anti-inflammatory drugs, slowly tapering over several months until the medication can be stopped. If ineffective, corticosteroid treatment may be administered; in severe cases, intravenous methylprednisolone may be given, and symptoms in most patients may improve within a few days. However, it is important to note that symptoms often reappear during steroid tapering.