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Revista Española de Cardiología (English Edition) Revista Española de Cardiología (English Edition)
Rev Esp Cardiol. 2017;70:393 - Vol. 70 Num.05 DOI: 10.1016/j.rec.2016.09.005

Hybrid 18F-FDG PET/MRI in Ischemic Cardiomyopathy

Leticia Fernández-Friera a,b,, Lina García Cañamaque c, Jorge Solís a,b

a Unidad de Imagen Cardiaca, Departamento de Cardiología, Hospital Universitario HM Montepríncipe-CIEC/Hospital Universitario HM Puerta del Sur, Madrid, Spain
b Área de Fisiopatología Vascular, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, Spain
c Departamento de Medicina Nuclear, Hospital Universitario HM Sanchinarro/Hospital Universitario HM Puerta del Sur, Madrid, Spain

Article

A patient was referred to our center due to progression of acute myocardial infarction. Electrocardiography showed necrosis in leads V1 to V5 and septoapical akinesia. Magnetic resonance imaging (MRI) revealed left ventricular dilatation and systolic function of 40%, with anteroseptal akinesia, as well as subendocardial enhancement (50%-75%) of the distal anteroseptal third and apical transmural segment (enhanced 4- and 2-chamber views: Figure 1, respectively). Catheterization showed severe stenosis of the middle portion of the anterior descending artery and a stent was implanted at this site. At 1 month, hybrid positron emission tomography (PET)/MRI with 18F-fluorodeoxyglucose showed radiotracer uptake in the septum, indicative of viable myocardium, reduced ventricular volumes, and improved function (PET, MRI, and PET/MRI fusion images: Figure 2, respectively). Hybrid MRI and PET techniques allow simultaneous visualization of anatomical and metabolic images, respectively. Integration of the 2 techniques can compensate for the limitations of each, with MRI helping to localize defects/uptake observed with PET and PET helping to determine tissue viability in regions with inconclusive results on MRI. Thus, multimodal imaging, widely used in oncology and neurology, could be useful in the field of cardiology field for aspects such as ischemic heart disease and inflammatory, infectious, and tumoral processes. Before the clinical implementation of this hybrid technique, it will be necessary to optimize patient selection, increase the availability of equipment and new radiotracers, reduce radiation levels, and compare the cost-effectiveness of PET/MRI in ischemic heart disease with that of separate MRI or PET scans.

Figure 1.

Figure 2.

Corresponding author: leticia.fernandez@cnic.es

1885-5857/© 2017 Sociedad Española de Cardiología. Published by Elsevier España, S.L.U. All rights reserved