Longitudinal deformation of a third generation zotarolimus eluting stent: “The concertina returns!”

Table 1 Design characteristics of commonly used stents

Stents	Xience V	Xience PRIME/ Xience Xpedition	Promus Element	Promus Premier	SYNERGY	Resolute Onyx
Stent platform	Vision: CoCr	Multilink-9: CoCr	PtCr	PtCr	PtCr	PtIr core Co alloy outer
Strut thickness	81 μm	81 μm	81 μm	81 μm	74 μm	81 μm (up to 4.0 mm) 91 μm (4.5 and 5.0 mm)
Connectors	3 links	3 links	2 links	2 links (4 between the 3 proximal hoops)	2 links	Every 4th crown laser fused (in the 2.75, 3.0 mm platforms every 5th crown fused)
Drug eluting	Everolimus	Everolimus	Everolimus	Everolimus	Everolimus	Zotarolimus
Polymer	Primer layer PBMA Drug matrix layer A semicrystalline random copolymer: PvDF-HFP	Primer layer PBMA Drug matrix layer A semicrystalline random copolymer: PvDF-HFP	Primer layer PBMA Drug matrix layer A semicrystalline random copolymer: PvDF-HFP	Primer layer PBMA Drug matrix layer A semicrystalline random copolymer: PvDF-HFP	Bioabsorbable PLGA	Biocompatible BioLinx polymer
Manufacturer	Abbott vascular, Santa Clara, CA, United States	Abbott vascular, Santa Clara, CA, United States	Boston Scientific, Natick, MA, United States	Boston Scientific, Natick, MA, United States	Boston Scientific, Natick, MA, United States	Medtronic CardioVascular Ltd, MN, United States

CoCr: Cobalt–chromium; PBMA: Poly(n-butyl methacrylate); PLGA: Poly(d,l-lactide-co-glycolide); PtCr: Platinum–chromium; PtIr: Platinum-iridium; PvDF-HFP: Poly(vinylidene uoride-co-hexa uoropropylene).