ECG changes in acute pericarditis

ECG changes in acute pericarditis are:

  • ST elevation with concavity upward
  • T inversion occurs after some days (once ST segment returns to baseline)
  • No change in QRS complexes (decrease in QRS voltage may occur in massive pericardial effusions)
  • PR segment depression (due to atrial involvement)
  • Atrial premature beats, atrial fibrillation