Anterograde perfusion is widely addopted strategy in aortic dissection type A treatement. Physiological blood flow direction reduces malperfusion complications during CPB and allows anterograde cerebral perfusion during circulatory arrest. In spite of these facts, femoral artery is still used as a cannulation site by surgeons worldwide. Primary end point was to analize the mortality in the two groups of patients (anterograde vs retrograde perfusion during CPB). Secondary end point was to compare frequency of postoperative complications, length of stay in ICU and in hospital.