What are the long-term mortality rates for patients with Type A and B aortic dissections compared to each other and the general hypertensive population?
While overall 5-year mortality is higher for Type A aortic dissection, 30-day survivors of Type B dissection face a significantly higher long-term mortality risk compared to the general hypertensive population.
Hypertension, aortic aneurysms, and chronic obstructive pulmonary disease were the most prevalent comorbidities. The 30-day mortality frequencies were consistent over time with no significant differences between sexes. The 5-year mortality rate was higher for TAAD than TBAD. If the patient survived 30 days from dissection, the mortality rate for patients with TAAD was comparable with that of the general hypertensive population, but the mortality rate was significantly higher in patients with TBAD.
Obel et al. (2022) studied this question.