Visualization devices, systems, and methods for informing intravascular procedures on blood vessel valves

The present technology relates generally to devices and methods for intravascular evaluation of blood vessels. Many embodiments of the technology relate to the intravascular evaluation of blood vessels before, during and after creation of autologous valves. In one embodiment, for example, the present technology is directed to a method comprising intravascularly delivering a delivery catheter to a target location adjacent a vessel wall and engaging the vessel wall along a portion of the delivery catheter. The method can further include determining the location of a first circumferential periphery of a dissection pouch formed within the vessel wall, determining the location of a second circumferential periphery of the dissection pouch, and determining an angular width of the dissection pouch based on the location of the first circumferential periphery and the second circumferential periphery.