Cardiac Resynchronization Therapy (CRT) has been shown to improve symptoms and quality of life for patients with moderate heart failure. OntoCareTM allows doctors to quantitatively measure the degree of success of CRT based on pre- and post-treatment ECG analysis. It generates Complexity Maps from ECG data to illustrate information flow within the heart and how this changes with treatment. OntoCareTM then measures the topological difference between pre- and post-treatment Maps to determine where and how much the therapy was successful. In the example, the overall impact of ablation therapy was approximately 63%.