Abstract: This paper reports a case of acute type B aortic dissection in a middle-aged male who admitted to the hospital with a chief complaint of "recurrent chest pain for 6 days". On admission, blood pressure was significantly elevated, accompanied by intermittent chest and back pain. Laboratory examination revealed markedly elevated D-dimer levels. Further aortic CT angiography (CTA) confirmed type B aortic dissection. After treatment with antihypertensive therapy, heart rate control, sedation, and analgesia, the symptoms improved, and the patient underwent thoracic endovascular aortic repair (TEVAR).