1. A computer-implemented method, comprising: accessing data relating to a first attachment point between a left ventricle and a right ventricle and a second attachment point between the left ventricle and the right ventricle; based on the data, preparing a sample set using a prior probability model for the left ventricle and the right ventricle; using a likelihood function to assign a weight to each sample within the sample set; and based on the weighted sample set, determining a bi-ventricular area of the right ventricle and the left ventricle.