What might happen if the elastic fibers in a blood vessels wall were defective?

If the elastic fibers in a blood vessel wall were defective, the vessel could lose its ability to stretch and recoil properly, leading to reduced flexibility and impaired blood flow. This could result in conditions such as vascular stiffness, hypertension, or aneurysms, where the vessel wall may bulge and become prone to rupture. Additionally, the overall integrity of the blood vessel could be compromised, increasing the risk of cardiovascular diseases.