**4.6 Angiography and video-densitometry**

Video-densitometric angiography is an emerging method, it was used in prospective trials as a reference tool for post-TAVR PVL assessment. It was reported to have high accuracy and allowed an objective comparison between different TAVR prostheses [22, 23]. For Kitamura M et al. it is helpful in litigious cases and intermediate degrees of regurgitation [24].

Accurate assessment of PVLs remains challenging. American and Japanese imaging and interventional societies collaboration resulted in a key guideline article dedicated to the evaluation of valvular regurgitation after percutaneous valve repair or replacement to help the development and result assessment of these interventions [25].
