Is a kissing intravascular lithotripsy (IVL) balloon technique feasible for treating a bifurcation lesion?

Kissing IVL Balloon Technique for Bifurcation Lesions

Yes, kissing intravascular lithotripsy (IVL) balloon technique is technically feasible for treating bifurcation lesions, though this represents an emerging off-label application with limited evidence specific to IVL in this context.

Technical Feasibility

The kissing balloon technique itself is well-established for bifurcation lesions. Guidelines support kissing balloon inflation (KBI) in specific bifurcation scenarios, particularly after elective double stenting where "clinical evidence supports the use of final kissing balloon inflation" 1. The European guidelines similarly recommend "final kissing balloon dilatation when two stents are eventually required" 2.

IVL-Specific Considerations

Evidence for IVL in Bifurcations

• Case reports demonstrate feasibility: IVL has been successfully used in left main bifurcation lesions, including complex calcified bifurcations requiring mechanical support 3, 4
• Novel applications emerging: A "hugging-balloon" configuration using IVL from one access and a non-compliant balloon from another has been described for aortic bifurcations 5
• No dedicated trials yet: The IKISS-LM trial is evaluating kissing balloon inflation in left main bifurcations but uses conventional balloons, not IVL 6

Practical Algorithm for Kissing IVL

When to consider:

1. Heavily calcified bifurcation lesions where calcium involves both the main vessel and side branch ostium
2. Calcium arc >270° or thickness >500 μm on intravascular imaging
3. Failed conventional balloon preparation

Technical approach:

• Position IVL balloons in both main vessel and side branch simultaneously
• Size balloons appropriately (typically 1:1 vessel-to-balloon ratio for IVL)
• Deliver lithotripsy pulses with both balloons inflated at low pressure (4 atm)
• Follow with high-pressure non-compliant balloon kissing inflation for final optimization

Critical Caveats

Major limitations:

• No dedicated safety data: IVL balloon profiles are larger than conventional balloons, potentially complicating side branch access
• Cost considerations: Using two IVL catheters significantly increases procedural cost
• Guideline recommendations focus on conventional balloons: All bifurcation guidelines reference standard balloon angioplasty [1-2]

Risk mitigation:

• Ensure adequate guide catheter support (typically 7-8F)
• Use intravascular imaging (IVUS/OCT) to assess calcium distribution and guide strategy
• Have conventional kissing balloon equipment available as backup
• Consider sequential IVL (main vessel first, then side branch) rather than simultaneous if access is challenging

Recommended Strategy

For calcified bifurcation lesions:

1. First-line: Rotational atherectomy remains the Class IIa recommendation for "fibrotic or heavily calcified lesions" 1
2. Alternative: IVL can be useful for plaque modification (Class 2b in 2022 guidelines) 7
3. Kissing IVL: Reserve for cases where:
   • Calcium involves both limbs of bifurcation
   • Conventional atherectomy is inadequate or contraindicated
   • Operator has experience with both IVL and complex bifurcation techniques

The technique is possible but should be considered advanced/experimental, used selectively by experienced operators in heavily calcified bifurcations where conventional approaches have failed or are predicted to fail based on imaging.