Processing cardiac data for personalized aha diagram

The invention relates to a method of processing cardiac data. The method comprises the steps of modeling a patient-specific coronary-artery anatomy, modeling a surface geometry of the patient-specific myocardium at a heart division, projecting the coronary-artery anatomy and the myocardium surface geometry onto a plane which is transverse with respect to an axis of the heart division, dividing the projected myocardium surface geometry in arterial territories being closest to a corresponding coronary-artery, and representing cardiac data associated with a specific arterial territory by a reduced number of cardiac parameters derived from said cardiac data.