The role of false lumen intervention to promote remodelling via induced thrombosis the FLIRT concept
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1 The role of false lumen intervention to promote remodelling via induced thrombosis the FLIRT concept Professor Christoph A. Nienaber The Royal Brompton and Harefield NHS Trust Cardiology and Aortic Centre
2 The ultimate goal in treating any dissection is mending the layers and healing of the aorta which requires stent-graft induced FL thrombosis and remodelling TEVAR in type A dissection Sakalihasan N, Nienaber CA et al. in preparation
3 2 predictors of long-term stability: FL thrombosis and Remodeling! B SE p- valu e OR 95.0% CI for Hazard Ratio Age Female STJ diameter Complete FLT IRAD data on file Suenaga H. et al. EJCTS 2016
4 Even after Stent-grafting No or Partial FL Thrombosis is not uncommon
5 Is it worth a FLIRT? Exclusively percutaneous minimalistic technique (based on the use of occluders, coils and ONYX) Promotes false lumen thrombosis to initiate remodelling Amenable to communications in any kind of dissection (A/B) Avoids the risk of (add l) BEVAR/FEVAR or open surgery Accepted CCI 2018
6 What is FLIRT? Exclusively percutaneous minimalistic technique (based on the use of occluders, coils and ONYX) Promotes false lumen thrombosis to initiate remodelling Amenable to communications in any kind of dissection (A/B) Avoids the risk of (add l) BEVAR/FEVAR or open surgery
7 The opposite of FLIRT: True Lumen Intervention nice initial Results!
8 True Lumen Intervention lasting 15 months.
9 A B C Interventional Repair of type a aortic dissection 2- and 3-dimensional images of proximal aortic dissection before (A) and after stentgraft (B) with successful remodelling, but later total erosion of distal stent-edge at 16 months (C). Pre-TEVAR At discharge 16 months F/U Yuan X et al under review 2017
10 This time another strategy why not a FLIRT this time? CASE M.P Inoperable Euroscore II 21%
11 CASE M.P
12 Interventional Repair of type a aortic dissection A pre procedure (FLIRT) B CT and echo images pre-procedure (A), at discharge (B) and 6-month follow-up (C) showing entry closure false lumen thrombus and shrinkage with true lumen expansion (remodelling) (patient no.2). Star shows the ASD occluder. At discharge C 6 months F/U Yuan X et al. CCI 2018
13 Another FLIRT: Subacute/Chronic dissection to induce remodelling? 64 y/o male patient - Sudden onset of chest/back pain History of chronic HTN Triple rule out CT diagnosis: Acute type B dissection Lusoria anatomy Distal malperfusion - Right arm claudication/ischemia - Lower extremity hypotension
14 Subacute/Chronic dissection induced remodelling! 1 st TEVAR with stent-graft and chimney technique Sequential follow-up CT scans after the 1 st procedure 55 day s Tear in fabric of SG and partial thrombosis of FL at day 5 post TEVAR At day 55 the FL thrombosis has improved, but is still incomplete and fed from the fabric tear Strategy: Secondary induction of complete FL thrombosis
15 Subacute/Chronic dissection induced remodelling! 2 nd procedure with coils and occluder Follow-up CTA scan 3 days after 2 nd procedure Post-procedure CTA scan showing complete thrombosis of the false lumen and sealing of the tear. Sagittal view after endovascular reconstruction confirming complete sealing by coils and occluder and a nonperfused false lumen. Patient will be followed in annual intervals.
16 or false lumen coils & occluder to facilitate thrombosis and aortic remodeling Pre-TEVAR 55 d post-tevar 3 d post-repair Complex, but uncomplicated case with secondary reperfusion of false lumen from proximal inflow caused by rupture of graft fabric. Retrograde coiling and an occluder turn procedural failure into a great success with additional procedures!
17 FLIRT with the impossible FL management in this type A dissection? 75 y/o female - Admitted from a routine surveillance CT of thoracic aortic aneurysm showed a new dissection in aortic root Hypertension Apronectomy in Feb 1999 Coronary angiogram : LAD 70% stenosis in 2001 Infra-renal AAA repair in 2006 Permanent pacemaker implantation in Mar 2007 Osteoarthritis with total knee replacements Lower gastrointestinal haemorrhage with bowel resection in 2015, end-to-end anastomosis Aorto-femoral bypass
18 Individual approach false lumen management in type A dissection Type A dissection confined to just above the aortic root to mid ascending aorta. Measured 26 x 42 mm Entry tear diameter 5mm
19 Individual approach false lumen management in type A dissection Angiogram confirms the false lumen and entry tear. 15 x 5 mm coils deployed via MP followed by a 10mm Amplatzer PFO closure device placed across the entry tear. Final angiogram shows tear sealed and coronary ostium unblocked.
20 Individual approach false lumen management in type A dissection CT scan 3 days after procedure CT scan 6 months after procedure No contrast communication to the false lumen Device sealing in site precisely with excellent remodelling Yuan X et al. JEVT 2017
21 Demographic information, pathology and procedures Yuan X et al (accepted 2018)
22 Procedural details (FLIRT concept) and success rate Yuan X et al (accepted 2018)
23 Impact of FLIRT on anatomic details, remodelling and false lumen thrombosis in proximal (type A) and distal (type B) aortic dissection Yuan X et al (accepted 2018)
24 Proximal dissection cases treated with FLIRT (occluders and coils), demonstrated the increasing true lumen area and shrinking maximum diameter of the aorta over time. Yuan X et al (accepted 2018)
25 FLIRT outlook Concept of a minimalistic approach to promote false lumen thrombosis, and induce remodelling after dissection. By use of coils and closure devices to manage the false lumen as an efficient (minimalistic) strategy likely to avoid problems of add l stentgrafts (incl. FEVAR and BEVAR) and open surgery in selected cases. First observations will be followed by systematic documentation of any false lumen intervention in either the ascending or descending aorta.
26 Brompton Aortic Centre 2018 Prof J Pepper cardiac surgeon Mike Rubens Imaging Ulrich Rosendahl cardiac surgeon Jullien Gaer cardiac surgeon Prof C Nienaber cardiologist Maz Mireskandari vascular surgeon
27 Highly complex case selected for elective FLIRT at distal reentries Candidate for FLIRT? Surgery 1995/ TEVAR in ET 2/18
28 Ready for broader applications?: Ingrown TAVI-Valve Perkutane Klappe ist ins biologische Milieu integriert Dauerhafte Fixierung gesichert Degeneration?
29 Pre-TEVAT Post-TEVAT One month after TEVAR
30 Surgery for type A post type A TEVAR + FLIRT repair for residual dissection
31 TEVAR in type A? post type A surgical repair residual dissection 54 y/o male patient - Type A dissection & surgical repair on post-op CT found a residual dissection flap and tear at the level of the very proximal arch. True lumen in descending aorta is very small with partial occlusion of the left and right renal artery. - Chronic HTN
32 TEVAR in type A? post type A surgical repair residual dissection A short stentgraft was deployed in ascending aorta to isolate the suture leak and renal arteries stenting for partial occlusion of renal arteries
33 TEVAR in type A? post type A surgical repair residual dissection 5 days after procedure 6 months after procedure
34 Emerging Therapy for the ascending Aorta Lu Q, et al. J Am Coll Cardiol 2013;61: IRAD (submitted)
35 PETTICOAT for improved realignment?
36 Another example of remodeling with TEVAR Complete false lumen thrombosis in the descending thoracic aorta Pre-procedure Post-procedure 24 months
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