A 50-year-old man with a history of hypertension awakened with acute retrosternal chest pain accompanied by dim consciousness. He was transferred to cardiac catheterization laboratory for emergent percutaneous coronary intervention (PCI) but diagnostic coronary angiography was difficult and unsuccessful. Therefore, he was immediately conducted the thoracoabdominal computed tomography angiography (CTA). The CTA showed aortic dissection (Stanford type A), involving the left main coronary artery (LMCA) and left anterior descending (LAD). Emergency surgery was executed. Unfortunately, this patient eventually died of multiple organ dysfunction syndromes.