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Objectives To observe the impact of admission blood pressure on in-hospital mortality in patients with aortic dissection Methods The clinical data of 580 in-hospital patients with aortic dissection were divided into five groups according to the admission blood pressure: group A: 90-119/60-79 mmHg, group B:120-139/80-90 mmHg, group C: 140-159/90-99 mmHg, group D: 160-179/100-109 mmHg and group E ≥180 mmHg.