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.
Objective:
The ECG has been traditionally used to support the diagnosis of pericarditis. However, the pericardium is electrically silent and ECG changes may imply concurrent myocardial involvement rather than simple pericarditis. The aim of the present paper is to analyse the frequency, type and clinical implication of ECG changes in patients with pericarditis compared with those with myocarditis.
Methods:
Consecutive patients with pericarditis and/or myocarditis were included in a prospective cohort study from January 2017 to December 2020. A clinical and echocardiographic follow-up was performed at 1, 3, 6 months and then every 6 months. Cardiac magnetic resonance was used to diagnose concurrent myocarditis.
Results:
166 patients (median age 47 years, 95% CI 44 to 51) with 66 men (39.8%) were included: 110 cases with pericarditis (mean age 47.7 years, 29.1% male) and 56 cases with myocarditis (mean age 44.8, 60.7% male). ECG changes were reported in 61 of 166 (36.7%) patients: 27 of 110 (24.5%) among those with pericarditis and 34 of 56 (60.7%) among those with myocarditis (p<0.0001). In multivariate logistic regression analysis, ECG changes were associated with troponin elevation (risk ratio 1.97; 95% CI 1.13 to 3.43), suggesting myocardial involvement. ECG changes were not associated with increased risk of adverse events.
Conclusions:
ECG changes, mainly widespread ST-segment elevation, can be recorded in about one-quarter of patients with pericarditis, and were not associated with a worse prognosis. These changes may reflect concurrent myocarditis that should be ruled out.
Related Concept Videos
Pericarditis II: Clinical Features and Diagnostic Tests
Electrocardiogram
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and...
Rheumatic Heart Disease II: Clinical Manifestations and Diagnostic Studies
Myocarditis II: Clinical Features and Diagnostic Tests
Pericarditis III: Medical Management
Acute Coronary Syndrome III: Diagnostic Studies


