What are etiologies of aortic dissection?

• Hypertension (known or misdiagnosed). • Connective tissue diseases: - Marfan syndrom. - Ehlers-Danlos syndrom. • Congenital malformations: - Bicuspid aortic valve. - Coarctation of the aorta • Traumatic (car accident: frontal shock). • Iatrogenic: - arterial catheterism. - during or after cardiac surgery. • Pregnancy (rare).