El rol de la resonancia magnética cardíaca en el diagnóstico diferencial entre miocarditis aguda e infarto agudo de miocardio con elevación del segmento ST / Cardiac magnetic resonance imaging for the diagnosis of acute myocarditis mimicking a myocardial infarction
Rev. méd. Chile
;
149(10): 1399-1411, oct. 2021. tab, ilus
Article
in Spanish
| LILACS
| ID: biblio-1389379
ABSTRACT
BACKGROUND:
Acute myocarditis frequently mimics an acute myocardial infarction, and its diagnosis is a clinical challenge.AIM:
To describe the characteristics of cardiac magnetic resonance imaging in patients with acute myocarditis hospitalized with a diagnosis of ST-segment elevation myocardial infarction. PATIENTS ANDMETHODS:
Twenty-four patients aged 33 ± 11 years (21 men) with a definitive diagnosis of acute myocarditis hospitalized with a presumptive diagnosis of ST-segment elevation myocardial infarction, in whom a coronary angiogram excluded significant atherosclerotic coronary lesions, were included. Cardiac magnetic resonance imaging with cine-resonance images was performed to assess global and regional ventricular function, and to study myocardial tissue characteristics. T2-STIR sequences were used for the assessment of oedema and late gadolinium enhancement for necrosis/fibrosis.RESULTS:
Patients had high levels of total CK, CK-MB, troponin I, brain natriuretic peptide and C-reactive protein. Cardiac magnetic resonance imaging revealed myocardial edema and late gadolinium enhancement was identified in all patients. The edema was transmural in 86% and subepicardial in 14%. Enhancement was subepicardial in 74% of patients and intramural in 26%. It was located in the inferior and lateral walls of the left ventricle in 93%, without affecting the endocardium. In all patients, two of three Lake Louise criteria were met, and an acute myocarditis was diagnosed.CONCLUSIONS:
Cardiac magnetic resonance imaging is the diagnostic method of choice for diagnosing acute myocarditis when it mimics an acute myocardial infarction.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Myocardial Infarction
/
Myocarditis
Type of study:
Diagnostic study
/
Prognostic study
Limits:
Adult
/
Humans
/
Male
Language:
Spanish
Journal:
Rev. méd. Chile
Journal subject:
Medicine
Year:
2021
Type:
Article
Affiliation country:
Chile
Institution/Affiliation country:
Clínica Bupa Reñaca/CL
/
Universidad de Valparaíso/CL
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