1. Translational large animal model of hibernating myocardium: characterization by serial multimodal imaging.
- Author
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Martínez-Milla, Juan, Galán-Arriola, Carlos, Carnero, Manuel, Cobiella, Javier, Pérez-Camargo, Daniel, Bautista-Hernández, Victor, Rigol, Montserrat, Solanes, Nuria, Villena-Gutierrez, Rocío, Lobo, Manuel, Mateo, Jesús, Vilchez-Tschischke, Jean Paul, Salinas, Beatriz, Cussó, Lorena, López, Gonzalo Javier, Fuster, Valentín, Desco, Manuel, Sanchez-González, Javier, and Ibanez, Borja
- Subjects
CORONARY disease ,ANIMAL models in research ,POSITRON emission tomography ,MYOCARDIAL perfusion imaging ,SPIRAL computed tomography ,MAGNETIC resonance ,HEART failure ,DIASTOLE (Cardiac cycle) - Abstract
Nonrevascularizable coronary artery disease is a frequent cause of hibernating myocardium leading to heart failure (HF). Currently, there is a paucity of therapeutic options for patients with this condition. There is a lack of animal models resembling clinical features of hibernating myocardium. Here we present a large animal model of hibernating myocardium characterized by serial multimodality imaging. Yucatan minipigs underwent a surgical casein ameroid implant around the proximal left anterior descending coronary artery (LAD), resulting in a progressive obstruction of the vessel. Pigs underwent serial multimodality imaging including invasive coronary angiography, cardiac magnetic resonance (CMR), and hybrid
18 F-Fluorodeoxyglucose positron emission tomography-computed tomography (FDG-PET/CT). A total of 43 pigs were operated on and were followed for 120 ± 37 days with monthly multimodality imaging. 24 pigs (56%) died during the follow-up. Severe LAD luminal stenosis was documented in all survivors. In the group of 19 long-term survivors, 17 (90%) developed left ventricular systolic dysfunction [median LVEF of 35% (IQR 32.5–40.5%)]. In 17/17, at-risk territory was viable on CMR and 14 showed an increased glucose uptake in the at-risk myocardium on18 FDG-PET/CT. The present pig model resembles most of the human hibernated myocardium characteristics and associated heart failure (systolic dysfunction, viable myocardium, and metabolic switch to glucose). This human-like model might be used to test novel interventions for nonrevascularizable coronary artery disease and ischemia heart failure as a previous stage to clinical trials. [ABSTRACT FROM AUTHOR]- Published
- 2020
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