1) Two-stent strategies can be used either as bail-out during provisional stenting if the side branch is compromised, or electively for complex bifurcation anatomies with predictors of side branch compromise.
2) Common two-stent techniques discussed include T/TAP stenting, mini-crush, culotte, and DK crush. Factors such as vessel diameters, angles, and lesion lengths help determine the appropriate technique.
3) Key steps discussed include optimal kissing balloon inflation, proximal optimization of the main vessel stent, and respecting the bifurcation anatomy. Being familiar with one or two techniques and using intravascular imaging is recommended.
6. When
1. Bail-out : Compromised SB during the provisional stenting strategy
-More than 75% SB stenosis with impaired TIMI flow < 3
-Chest pain and ECG changes
-Flow-limiting dissection
-FFR < 0.8 (DK VI trial)
Data from RCTs : Only needed in 5-20%
7. Accepted SB result
Yes
That’s it
No
Rewire-(PTCA/Kissing)-POT
Accepted SB result
That’s it
Bailout 2-stents technique
Provisional
stenting
Yes
No
“Provisional is a philosophy rather than technique”
9. When
2. Elective : Complex bifurcation anatomy with predictors of
important SB compromise
“A Side branch you don’t want to lose”
-Diameter >2.5 mm
-Severe stenosis >5-10 mm beyond ostium
-Unfavourable angle for recrossing
10.
11. "IF YOU FAIL TO PLAN, YOU ARE PLANNING TO FAIL"
“Benjamin Franklin’s”
12. • 1- The working view
• 2- Respect the anatomy
• 3-Optimal Kissing
• 4-Ideal POT
• 5- Know your tools
Five Fundamentals of 2-stents strategy
13. Point of the SB
take-off
Not always the
standard one
No overlap
No foreshortening
Hyung Yoo et al.JACC 2017
1-The working view
Need a 3rd eye ? > Intravascular imaging
14. 2-Respect the anatomy
1. The 3 diameters of a bifurcation.
Choosing strategy
DMV= SB > Culotte technique
Kissing balloon size
PMV DMV
SB
Finet et al. Eurointervention.2007
POT balloon size MV stent size
15. 2- Lesion length
SB lesion length
-Longer lesion length> more prone for occlusion,
Favoring 2 stents- strategy
-SB length>73 mm supply 10% myocardial mass
PMV lesion length
- Ensure enough stent length
for POT
PMV DMV DMV lesion length
- Ensure enough stent length
for kissing
SB
2-Respect the anatomy
16. • 3. Bifurcation angle
Hahn et al. Atherosclerosis. 2008 Dec
Bifurcation angle B
-More acute> More prone to SB compromise
-Determine bifurcation strategy
-Determine prognosis (Acute> worse)
B
A
Bifurcation angle A
-More acute> More difficult wiring
and re-crossing
Take care that angle might change after wiring or MV pre-dilatation
2-Respect the anatomy
21. 4-Ideal POT
Correction of mal-apposition in the proximal MB & facilitate rewiring
COBIS II registry: a significant difference in terms of a combined endpoint (MACCE) at 36-month follow-
up in favor of the POT group
22. 4-Ideal POT
• know the shortest available NC balloon 1:1 PMV
• Positioning is crucial ( distal marker opposite to carina)
Proximal optimisation technique in the bench with Kaname stent (Terumo, Tokyo, Japan)
23. 5-Know your tools (Balloons)
Shoulder at marker
Shoulder distal to marker
24. 5- Know your tools (Stents)
Courtesy of Jean Fajadet
35. T-Stenting
• Advantages:
- Suitable for angle 90
- Easy
• Disadvantages:
- Protrusion of SB stent
- Ostial gap (Restenosis)
Latib et al. EuroIntervention 2010
Rarely used nowadays
36. TAP-Technique
• Ensure full ostium coverage
• Bail-out” or Elective
• Create new metallic carina
Classic T
Courtesy of Francesco Burzotta, EBC
TAP
Proximal view
38. -SB balloon should be deflated last during kissing inflation to avoid distortion by the MB balloon
-If further SB/MB post-dilatation is needed , always finish with kissing/POT
SB
MB
Important Tips
39. Wire Recross
Courtesy of John Ormiston, EBC 2009
Allowing the projection of struts in the ostial segment of
the SB opposite the carina
Re-cross rule
All distal re-cross
Except crush
41. Classic crush (Too much protrusion)
• 7 Fr guiding catheter (2 stents)
• Rate of FKBI failure : 20%
• Failed kiss high rate of ST and ISR
Ormiston et al.JACC: Cardiovascular Interventions,2018
Rarely used nowadays
42. Mini-Crush (Minimal protrusion)
Latib et al. EuroIntervention 2010
• 7 Fr guiding catheter (2 stents)
• Rate of FKBI failure : 20%
• Failed kiss high rate of ST and ISR
Rarely used nowadays
44. DK-Crush
• DK-Crush I : Less TLR and MACE (DK-Crush vs. classic Crush)
• DK-Crush II : Less TLR but not MACE (DK-Crush vs. Provisional T)
• DK-Crush III : Less MACE (DK-Crush vs. Culotte)
• DK-Crush V : Less TLR in LMT (DK-Crush vs. Provisional)
• DK-Crush VIII: Ongoing (IVUS guided vs angiographic guided DK crush)
51. V-Stenting
• Advantages:
- Suitable for normal proximal MB (rare)
- No need for rewiring
- Emergency technique
• Disadvantages:
- Geographic miss in proximal MB
- Large guiding 7 or 8 Fr
Latib et al. EuroIntervention 2010
53. SKS-Technique
• Advantages:
- Suitable for large proximal MB
- No need for rewiring
-Emergency technique
• Disadvantages:
- Large guiding 7 or 8 Fr
- Diaphragmatic membrane
-Challenging dealing with stent failure
A B
C
55. • Where possible, keep it Simple, Swift and Safe
• Be familiar with 1 or 2 techniques , remember “ The one you know is the better one”
• Angiography is half of the truth and intravascular imaging is the other half
• Know your kit “balloons and stents” and more importantly respect it
• Always POT before re-wiring and re-POT after kiss
Take home message
If proximal stent is needed . . . . Stent would be directed towards one arm leaving a gap
A simple lesion can change to a complex lesion with the presence of 2 of the following 6 minor criteria 1) moderate to severe calcification; 2) multiple lesions; 3) LAD-LCx bifurcation angle >70°; 4) main vessel reference vessel diameter <2.5 mm; 5) thrombus-containing lesion; and 6) main vessel lesion length >25 mm. Complex lesions generally require a 2-stent strategy.