#$%^&*AU2014203597B220180510.pdf#####ABSTRACT A parametric model representing a portion of a heart is constructed using a statistical prior of the shape from a dataset of other instances of the portion. Using a mapping electrode, electrical data is acquired in a plurality of locations in the portion of the heart of a subject. The parametric model is fitted to the electrical data and the statistical prior to produce an isosurface of the portion of the heart and a reconstruction of its shape.