Diagnostic and prognostic role of the electrocardiogram in patients with pericarditis

Massimo Imazio1, Gabriele Barberi Squarotti2, Alessandro Andreis2,3

  • 1Cardiothoracic Department, Cardiology, University Hospital Santa Maria della Misericordia, Azienda Sanitaria Universitaria Friuli Centrale (ASUFC), Udine, Italy massimo_imazio@yahoo.it massimo.imazio@uniud.it.

Insights

Electrocardiogram (ECG) changes occur in about a quarter of pericarditis patients, often indicating concurrent myocarditis. These ECG findings do not predict a worse prognosis but warrant further investigation for myocarditis.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Diagnostic Imaging

Background:

  • Electrocardiogram (ECG) is a traditional tool for diagnosing pericarditis.
  • The pericardium is electrically silent; thus, ECG changes may suggest concurrent myocardial involvement.
  • Distinguishing between pericarditis and myocarditis is crucial for appropriate patient management.

Purpose of the Study:

  • To analyze the frequency, type, and clinical implications of ECG changes in patients with pericarditis.
  • To compare ECG findings in pericarditis patients with those in myocarditis patients.
  • To determine if ECG changes in pericarditis are associated with concurrent myocardial involvement or prognosis.

Main Methods:

  • Prospective cohort study including consecutive patients diagnosed with pericarditis and/or myocarditis (January 2017 - December 2020).
  • Clinical and echocardiographic follow-up at 1, 3, 6 months, and every 6 months thereafter.
  • Cardiac magnetic resonance imaging (CMR) used to diagnose concurrent myocarditis.

Main Results:

  • 166 patients were included: 110 with pericarditis and 56 with myocarditis.
  • ECG changes were present in 36.7% of all patients, significantly more frequent in myocarditis (60.7%) than pericarditis (24.5%) (p<0.0001).
  • ECG changes in pericarditis were associated with troponin elevation (suggesting myocardial involvement) but not with adverse events.

Conclusions:

  • ECG changes, primarily widespread ST-segment elevation, are observed in approximately 25% of pericarditis patients.
  • These ECG findings in pericarditis are not linked to a worse prognosis.
  • The presence of ECG changes in pericarditis may indicate concurrent myocarditis, necessitating its exclusion.
Abstract

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