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Area of Science:

  • Cardiology
  • Pulmonology
  • Emergency Medicine

Background:

  • ST-segment elevation on electrocardiograms (ECGs) typically indicates acute myocardial infarction.
  • However, other critical conditions can also manifest with ST-segment elevation, necessitating differential diagnosis.

Observation:

  • A patient presented with dyspnea and ECG changes suggestive of ST-segment elevation myocardial infarction.
  • The patient was diagnosed with pneumomediastinum, a condition involving air in the mediastinum.

Findings:

  • Coronary angiography revealed no signs of myocardial injury.
  • The ST-segment elevation on the ECG resolved spontaneously as the pneumomediastinum improved.

Implications:

  • Pneumomediastinum should be considered in the differential diagnosis of ST-segment elevation myocardial infarction, especially in the presence of dyspnea.
  • This case highlights the importance of considering non-coronary causes for ST-segment elevation to avoid unnecessary invasive procedures.