I'm native american am i more susceptible to having vascular diseases?

Depends: Cardiovascular risk factors are dependent on family history, smoking, cholesterol, hypertension, and diabetes/obesity. So if you have any of these risk factors then your risk is higher, the color of your skin is not as critical in determining risk compared to these risks above. Native americans tend to have high rates of diabetes which increases risk.

No: Could be a generic link for aneurysms. I would be active, not smoke, control cholesterol an sugar.