Penn Classification (Aortic Dissection Outcome) Calculator

Penn Classification (Aortic Dissection Outcome): Explanation and Clinical Context The Penn Classification is a prognostic tool for patients with Type A aortic dissection, focusing on the presence of organ malperfusion and circulatory collapse. It stratifies patients into four categories: - Penn Aa: No evidence of ischemia; patient hemodynamically stable. - Penn Ab: Localized organ ischemia; hemodynamically stable. - Penn Ac: Circulatory collapse or shock without localized ischemia. - Penn Abc: Both localized ischemia and circulatory collapse. The classification allows clinicians to estimate in-hospital mortality risk, guide surgical urgency, and predict clinical outcomes.

Estimated mortality rates based on original publications: Penn Aa ~5–10%, Penn Ab ~15–25%, Penn Ac ~30–50%, Penn Abc >50%.