Purulent Pericarditis | |
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Echocardiogram showing pericardial effusion with signs of cardiac tamponade | |
Specialty | Cardiology |
Symptoms | substernal chest pain (exacerbated supine and with breathing deeply), dyspnea, fever, rigors/chills, and cardiorespiratory signs (i.e., tachycardia, friction rub, pulsus paradoxus, pericardial effusion, cardiac tamponade, pleural effusion) |
Usual onset | acute |
Causes | recent surgery, adjacent infection, trauma, primary infection |
Diagnostic method | electrocardiogram (ECG), echocardiogram/cardiac ultrasound ("echo"), chest radiograph, clinical symptoms, laboratory tests |
Treatment | antibiotics, pericardiocentesis, pericardiectomy, pericardial window, video-assisted thoracic surgery |
Purulent pericarditis refers to localized inflammation in the setting of infection of the pericardial sac surrounding the heart.[1] In contrast to other causes of pericarditis which may have a viral etiology, purulent pericarditis refers specifically to bacterial or fungal infection of the pericardial sac.[2] Clinical etiologies of purulent pericarditis may include recent surgery, adjacent infection, trauma, or even primary infection.[3] The onset of purulent pericarditis is usually acute, with most individuals presenting to a medical facility approximately 3 days following the onset of symptoms.[4]
As a subtype of pericarditis, purulent pericarditis often presents with substernal chest pain that is exacerbated by deep breathing and lying in the supine position.[5] Other presenting features that may be more specific for purulent pericarditis include fever, rigors/chills, and cardiorespiratory signs (i.e., tachycardia, friction rub, pulsus paradoxus, pericardial effusion, cardiac tamponade, pleural effusion).[4] The incidence of cardiac tamponade varies from 42-77% and is associated with rapid-onset mortality, especially without prompt intervention.[4]
Chest radiography may reveal cardiomegaly, pneumonia, pleural effusion, and/or mediastinal widening.[4] Electrocardiogram (ECG) is a component of the diagnostic work-up which may suggest pericarditis as the underlying cause of symptoms. The ECG findings for purulent pericarditis are similar to those for other etiologies of pericarditis. ECG findings may include diffuse S-T segment elevation, diffuse T wave inversion, low QRS voltage, and/or electrical alternans.[4][6] Echocardiogram may be used to evaluate for fluid collection in the pericardial sac, and may be important in guiding therapy in patients with signs of cardiac compromise (i.e., cardiac tamponade).[3][7]
Treatment modalities for purulent pericarditis include antibiotic therapy, with potential adjuncts such as pericardiocentesis or pericardial window when cardiac compromise is evident.[3]