The present invention relates to an apparatus for assisting catheterization of a heart (10) of a subject (8) comprising a segmented model providing unit (220) for providing a segmented model comprising a plurality of segments (401, 402, 403, 404, 405), wherein each segment corresponds to a predefined region of the heart (10), a segment determination unit (230) for determining a current segment corresponding to the location of an actively tracked pulmonary artery catheter (100), a hemodynamic data providing unit (240) for providing hemodynamic data corresponding to the location of the actively tracked pulmonary artery catheter (100), and an evaluation unit (250) for evaluating the hemodynamic data in reaction to the determined segment. The pulmonary artery catheterization assistance apparatus as well as the corresponding pulmonary artery catheterization assistance method and computer program allow for an improved evaluation of hemodynamic data in pulmonary artery catheterization.
