Ultrahigh field cardiac MRI in a large animal model with acute and chronic infarction is feasible and enables high resolution functional imaging with 4- to 16-fold higher in-plane resolution compared to clinical systems. Blood-tissue contrast enabled clear identification of tissue boundaries, papillary muscle and the valves. Apical slices were akinetic. Mean values for ejection fraction [%] at baseline and 3-4, 10-14, and 60 days post MI were: 66±5, 45±7, 49±10, 50±5, respectively. Coefficients of variation for intra- and inter-observer variability in ejection fraction were 1.5% and 6.2%. T2*-weighted images and LGE enabled visualization of the infarct area.
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