Korean Circ J.  2020 Sep;50(9):839-842. 10.4070/kcj.2020.0058.

Unpredictable Midterm Coronary Damage after Knuckle-reverse CART: Should We Be More Careful?

Affiliations
  • 1Cardiovascular Interventional Unit, Division of Cardiology, Department of Medicine, Centre Cardio-Vasculaire, CHU de Poitiers, Poitiers, France
  • 2Cardiovascular Interventional Unit, CHU de Clermont-Ferrand, Clermont-Ferrand, France


Figure

  • Figure 1 (A, F, K) Right coronary artery with proximal chronic total occlusion. (B, G, L) Immediate perfect angiographic result after successful CTO PCI using the reverse CART technique. (C, H, M) Immediate OFDI result. Stents are well apposed everywhere. Some struts are deeply impacted in the media which seems to be heterogenous (thrombus, haematoma or scar of dissection?). (D, I, N) One-month systematic angiographic control showing several aneurysms in the reverse CART target zone (arrows). (E, J, O) One-month systematic OFDI control showing large and circumferential acquired stent malapposition. Stents are perfectly deployed without underexpansion (mean diameters are equal to the initial stent size, A4 SMD: 3.6 mm; B4 SMD: 3.6 mm; C4 SMD: 4.1 mm). Stent struts appear to be free of thrombus or neoendothelium. The vessel lumen area increased abnormally with a mean diameter compatible to acquired shredding aneurysms (A4 LMD: 6.2 mm; B4 LMD: 5.9 mm; C4 LMD: 5.4 mm).CART = Controlled Anterograde and Retrograde Tracking; CTO = chronic total occlusion; LMD = lumen mean diameter; OFDI = Optical Frequency Domain Imaging; PCI = Percutaneous Coronary Intervention; SMD = stent mean diameter.


Reference

1. Galassi AR, Sumitsuji S, Boukhris M, et al. Utility of intravascular ultrasound in percutaneous revascularization of chronic total occlusions: an overview. JACC Cardiovasc Interv. 2016; 9:1979–1991. PMID: 27712732.
2. Srivatsa SS, Edwards WD, Boos CM, et al. Histologic correlates of angiographic chronic total coronary artery occlusions: influence of occlusion duration on neovascular channel patterns and intimal plaque composition. J Am Coll Cardiol. 1997; 29:955–963. PMID: 9120181.
3. Jia H, Hu S, Liu H, et al. Chronic total occlusion is associated with a higher incidence of malapposition and uncovered stent struts: OCT findings at 6 months following DES implantation. Catheter Cardiovasc Interv. 2017; 89:582–591. PMID: 28318139.
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