A 71-year-old female patient was admitted in a hospital emergency room due to severe chest pain. On the day after acute cardiac failure occurred during coronary catheterization which had been performed due to abnormalities in ECG. Diagnosis aortic dissection type De Bakey I originating in the ascending aorta, propagating in the innominate artery and thoracoabdominal aorta until the bifurcation, perforating into the pericardial sac, mediastinum and left pleural cavity. Thoracic post-mortem CT after MPMCTA (dynamic phase). PMCT, coronal reconstruction, MIP. Autopsy confirmed no relationship to percutaneous coronary intervention