ECG characteristics:

Etiology:

• Inflammatory (viral, bacterial, fungi, TB)
  
• Post infarct (Dressler syndrome)
  
• Metabolic
  
• Systemic disease

ECG characteristics:

• ST segment elevation with S saw-toothing
  
• Initially positive T wave, later negative
  
• Low voltage with pericardial effusion

Mechanism:

• Damaged outer myocardial layer is electropositive compared to the inner layer
  
• Flow of current from inner to outer layer

Treatment:

• Treatment of the underlying disease
  
• Anti-inflammatories
  
• Pericardial punction if effusion compromising hemodynamic stability