Relación entre electrocardiograma y resonancia magnética cardíaca en la topografía del infarto de miocardio previo

Introduction: The performance of the electrocardiogram and its potential utility to confirm the topographic diagnosis of previous myocardial infarction according to cardiac magnetic resonance imaging is a very useful technique. Objective: To determine the relationship between the electrocardiogram and the cardiac magnetic resonance imaging with respect to the location of previous myocardial infarction. Method: A cross-sectional study, was carried out between 2017 and 2018 at the Centro de Investigaciones Médico-Quirúrgicas and the Instituto de Cardiología y Cirugía Cardiovascular, of Havana, Cuba. Cardiac magnetic resonance imaging with gadolinium was performed in a Magnetom Aera 1.5 T equipment and the infarct location was evaluated according to the electrocardiogram. The presence and pattern of late gadolinium enhancement were determined. Results: Ninety-three patients were studied with predominance of men (86%). High blood pressure was the most frequent cardiovascular risk factor (69.9%). The correlation of late gadolinium enhancement with the electrocardiogram showed that 90.5% of previous anterior wall myocardial infarctions presented late enhancement in that location. In inferior myocardial infarctions, subendocardial involvement predominated (66.7%), as did indeterminate ones (66.7%). There were 57 cases with demonstrated scarring by cardiac magnetic resonance imaging; among them, only 40% of those with complete left bundle branch block. Conclusions: Cardiac magnetic resonance imaging confirmed the presence of myocardial necrosis in the majority of patients with Q waves in the electrocardiogram, which continues supporting its use for this purpose. There is a high relationship between the infarct location by both diagnostic tests. Introducción: Las aplicaciones del electrocardiograma y su posible utilidad para confirmar el diagnóstico topográfico del infarto de miocardio previo, según la resonancia magnética cardíaca, constituye una técnica de gran utilidad. Objetivo: Determinar la relación entre el electrocardiograma y la resonancia magnética cardíaca respecto a la topografía del infarto de miocardio previo. Método: Estudio transversal, realizado entre 2017 y 2018 en el Centro de Investigaciones Médico-Quirúrgicas y el Instituto de cardiología y Cirugía Cardiovascular de La Habana, Cuba. Se realizó resonancia cardíaca con gadolinio en equipo Magnetom Aera 1.5 T y se evaluó la localización del infarto según el electrocardiograma. Se determinó la pres