Citation: Catheterization & Cardiovascular Interventions. 2018 Oct 30.Journal: Catheterization and cardiovascular interventions : official journal of the Society for Cardiac Angiography & Interventions.Published: ; 2018ISSN: 1522-1946.Full author list: Ben-Dor I; Rogers T; Satler LF; Waksman R.UI/PMID: 30378244.Subject(s): IN PROCESS -- NOT YET INDEXEDInstitution(s): MedStar Heart & Vascular InstituteActivity type: Journal Article.Medline article type(s): Case ReportsOnline resources: Click here to access onlineDigital Object Identifier: https://dx.doi.org/10.1002/ccd.27870 (Click here)ORCID: Satler, Lowell F http://orcid.org/0000-0001-6446-2683Waksman, Ron http://orcid.org/0000-0002-4063-9226 (Click here) | (Click here)Abbreviated citation: Catheter Cardiovasc Interv. 2018 Oct 30.Local Holdings: Available online from MWHC library: 1996 - present, Available in print through MWHC library: 1996 - 2006.Abstract: Transcatheter aortic valve replacement has become a mainstay alternative to surgical aortic valve replacement in patients with severe aortic stenosis at high and intermediate surgical risk. Two commercially approved valves are available in the United States: balloon-expandable and self-expanding. We report here a rare complication of a self-expanding Evolut PRO (Medtronic, Minneapolis, Minnesota) valve failing to expand due to nitinol frame infolding. This results in a malopposed valve with a severe paravalvular leak, even though treated successfully with balloon valvuloplasty. It is important to recognize the characteristic angiographic signature of this complication-the "straight line" sign-and how to avoid this potentially serious complication by balloon valvuloplasty or by recapture and deployment of a new valve.Abstract: Copyright (c) 2018 Wiley Periodicals, Inc.