ZEB1 expression level was significantly higher in BAV‐D compared to TAV‐D aorta, whilst the expression levels were not different either between BAV‐ND and BAV‐D aorta or TAV‐ND and TAV‐D aorta, implying that ZEB1 activity did not increase due to the aneurysm development, either in BAV or in TAV patients. The gene discussed is ZEB1; the disease is aneurysm.