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STENT THROMBOSIS. Complex and Simple techniques: The same risk? David Hildick-Smith Sussex Cardiac Centre Brighton, UK. No The risk with complex stenting is higher. 2 aspects. Intuitive Scientific. Intuitive. Could the risk be less with 2 stent technique than with single?
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STENT THROMBOSIS Complex and Simple techniques: The same risk? David Hildick-Smith Sussex Cardiac Centre Brighton, UK
No • The risk with complex stenting is higher
2 aspects • Intuitive • Scientific
Intuitive • Could the risk be less with 2 stent technique than with single? • For an optimal technique, will the risk be the same for a one stent and a two-stent technique? • For a badly done case, will the risk be higher with a two stent rather than a one stent technique? • How many 2-stent cases have been done - 50,000? • Have they all been done well?
Scientific • Initial 2-stent DES studies • Colombo 2004 • 3.5% early stent thrombosis in double-stent versus 1% in single stent
Prior to routine kissing • Subsequently many randomised studies…
This randomised trial data almost all relates to the short to medium term when all patients are on dual antiplatelets
Lets look at a larger dataset • Registry better than Randomised? • Registry reflects usual practice • Much larger numbers • Techniques are heterogenous
0.05 0.04 0.03 0.02 0.01 0 0 365 730 1095 Stent Thrombosis in J-Cypher Registry ARC Definite Between 30 Days and 3 Years Slope 0.28% / Year Follow-up interval (Days) 30 Days 1 Yr. 2 Yrs. 3 Yrs. Cumulative incidences0.36%0.61%0.84%1.18% n of pts at risk 12,824 12,625 11,843 9,036 4,191 # Events: Not yet fully adjudicated
Predictors of LST / VLST Multivariable analysis LST / VLST in 67 lesions among 16,801 lesions treated exclusively by Cypher Factors R.R. 95%C.I. P Value Hemodialysis 1.91 (1.29 - 2.65) 0.002 ESRD (e-GFR < 30/Non-HD) 1.81 (1.2 - 2.65) 0.007 Two stents for bifurcation 1.81 (1.17 - 2.59) 0.01 Those variables with p value < 0.1 in the univariable analysis were incorporated into the multivariable model.
CONCLUSION • Stent thrombosis rates are (intuitively and) scientifically found to be greater for two stent techniques