1. A method for assessing heart valve operation with medical diagnostic imaging data, the method comprising: estimating, with a processor, a first location of a heart valve from application of the medical diagnostic imaging data to a global location model, the first location being within a volume represented by the medical diagnostic imaging data; estimating, with the processor, a second location of a landmark of the heart valve relative to the heart valve, the estimating of the second location being a function of the estimated first location; estimating, with the processor, a surface of the heart valve as a function of the estimated second location of the landmark; and displaying an image representing the heart valve, the image being a function of the surface.