Acute Pericarditis Differential Diagnoses
- Author: Sean Spangler, MD; Chief Editor: Joseph L Fredi, MD more...
Diagnostic Considerations
The classic feature of chest pain and dyspnea with pericarditis may be subtle and can be confused with other diagnoses, particularly in elderly individuals. Be careful not to confuse pericarditis with esophageal disorders, costochondritis, or other causes of noncardiac chest pain. Pericarditis may occur after renal transplantation, which may be related to uremia or infections (eg, cytomegalovirus [CMV]). Liver disease has been noted in asymptomatic constrictive pericarditis.
Given an overall lack of specificity of clinical features, diagnostic protocols to determine the etiology for pericarditis have been described. Following specific protocols, several investigators determined a specific etiology in 14-22% of patients. In one study, cardiac tamponade and an unfavorable clinical outcome, with persistence of fever, significant pericardial effusion, or general illness lasting longer than 1 week, was highly associated with finding a specific etiology. See an example under Workup.
Small asymptomatic pericardial effusions in patients with acquired immunodeficiency syndrome (AIDS) may not require diagnostic evaluation.[18] Large symptomatic pericardial effusions should be investigated, because two thirds of such effusions are potentially infections or neoplasms. Tuberculous pericarditis can also occur.[8]
Tension pneumothorax may mimic cardiac tamponade. Trauma ultrasonography has limited this misdiagnosis.
Elevated central venous pressure (CVP) may be absent in patients with pericarditis and preexisting hypovolemia.
Differentiating pericarditis from acute MI
Aside from clues elicited from the history and physical examination, pericarditis can be difficult to distinguish from myocardial infarction (MI) and repolarization in patients who present with chest pain and ST-segment elevation on electrocardiograms (ECGs). The potential misdiagnosis of pericarditis for acute MI has led to unfortunate complications when thrombolytic therapy has been given.
Some ECG findings that may be helpful include the following:
- Repolarization does not progress through stages and is uncommonly associated with PR depression. Serial monitoring of ECGs in young patients with chest pain helps differentiate early repolarization from acute pericarditis.
- An ST-segment–to–T-wave ratio of 0.25 or more in V6 can distinguish acute pericarditis from early repolarization.
- The ST segment in acute MI is usually convex, bowing upward with reciprocal changes, as opposed to concave ST segments without reciprocal changes observed in acute pericarditis and repolarization.
Differential Diagnoses
- Angina Pectoris
- Aortic Dissection
- Aortic Stenosis
- Coronary Artery Vasospasm
- Esophageal Rupture
- Esophageal Spasm
- Esophagitis
- Gastritis, Acute
- Gastroesophageal Reflux Disease
- Myocardial Infarction
- Myocardial Ischemia
- Peptic Ulcer Disease
- Pulmonary Embolism
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