J Am Coll Cardiol 1995; 25: 1479
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1 Complex PCI: IVUS-Guided PCI Junko Honye Fuchu Keijinkai Hospital, Tokyo Gifu Heart Center, Gifu Japan
2 Roles of IVUS during PCI 1. IVUS before PCI (automatic pullback) Device selection: direct stenting? Pretreatment with POBA or Rotablator? To decide stent size and length To predict probable complications 2. IVUS during PCI: Repeat IVUS if necessary Marking technique 3. IVUS after PCI (automatic pullback) Stent expansion (MLD, MSA) Incomplete stent apposition, Edge injury 4. IVUS when complication occurred Acute occlusion Slow flow / no-reflow phenomenon Perforation
3 Calcium J Am Coll Cardiol 1995; 25: 1479
4 Calcified lesions People can live longer. Patients with multiple co-morbidity (older age, diabetes, CRF on hemodialysis i etc.) can live longer because of dramatic improvement of medical therapy. We have to struggle with this kind of patients with complex lesion subsets.
5 Role of IVUS in calcified lesions Unable to cross the lesion Rotablator, Scoring balloon or conventional balloon with buddy wire
6 Calcified lesion Diagonal branch
7 Calcified lesion IVUS could not pass the lesion
8 Calcified lesion ScoreFlex 2.0x10mm
9 Calcified lesion
10 IVUS post ScoreFlex Dissection Score Once discontinuation of calcium has been achieved adequate Once discontinuation of calcium has been achieved, adequate stent expansion can be obtained.
11 Calcified lesion Driver Sprint 2.5x14mm
12 Role of IVUS in calcified lesions Unable to cross the lesion Rotablator, Scoring balloon or conventional balloon with buddy wire Check location and distribution of calcium Superficial Rotablator Deep Pre-dilatation with balloon Check position of the IVUS catheter within the lumen to understand the guidewire bias for effective debulking with Rotablator
13 Rotablator: Vessel modification Thickness of calcium thinner Circumferential calcium localized or not circumferential Inhomogeneous morphology with rough surface round shape POBA after Rotablator to create dissection to achieve adequate expansion of fth the stent t
14 Dissection is necessary 1. To obtain enough stent expansion. 2. Pre-dilatation is inevitable in lesions with superficial calcium or concentric plaque. 3. If lesions are not fully dilated with pre- dilatation, appropriate stent expansion cannot be achieved with even higher pressure. 4. Stent underexpansion because of heavy calcium is one of the worst case of scenario which is very difficult manage following initial PCI.
15 Rotablator: Vessel modification Thickness of calcium thinner Circumferential calcium localized or not circumferential Inhomogeneous morphology with rough surface round shape POBA after Rotablator to create dissection to achieve adequate expansion of fth the stent t It may be able to minimize incomplete stent apposition To prevent severe complication including vessel perforation following vigorous dilatation
16 Effective ablation To minimize calcium begger size of the burr No complication vessel perforation, no-reflow phenomena It is not necessary to use maximum size of the burr to the lesion, once calcium has been adequately ablated with only one burr. IVUS can help you to determine the optimal procedures during PCI.
17 IVUSfidi findings post trtblt Rotablator 1. Morphological l changes of calcium 2. If calcium was adequately ablated, IVUS demonstrates smooth surface and round-shape calcium with reverberation behind calcium. 3. It is important to check the position i of the IVUS catheter within the lumen and the location of calcium, that help you determine to use bigger size of a burr.
18 Different types of calcium Reverberations Acoustic Shadow Deep Calcium Superficial Calcium Napkin-ring
19 Reverberation: artifact Multiple reflections behind calcium with equal intervals Typical findings of adequate ablation
20 Role of IVUS in calcified lesions Unable to cross the lesion Rotablator, Scoring balloon or conventional balloon with buddy wire Check location and distribution of calcium Superficial Rotablator Deep Pre-dilatation with balloon Check position of the IVUS catheter within the lumen to understand the guidewire bias for effective debulking with Rotablator Check if effective ablation has been achieved and residual calcium to decide using bigger size of the burr
21 Case: 70 s female, CRF on HD Terumo Intrafocus WR
22 Rotablator 1.25mm
23 Post Rotablator 1.25mm Terumo Intrafocus WR Terumo Intrafocus WR Manual pullback
24 IVUS post Rotablator 1.25mm Check position of IVUS catheter, which is very close to ablated but residual heavy calcium
25 Rotablator 1.75mm
26 Rotablator 1.75mm Terumo Intrafocus WR Terumo Intrafocus WR Manual pullback
27 ScoreFlex 3.0mm post Rotablator
28 Stent implantation Endeavor 3.0x24mm Endeavor 3.0x12mm
29 Final CAG and IVUS
30 Case: Angina, 80 s female
31 Heavily calcified bifurcation i Rotablator? LMT to LAD or LMT to LCX or Both?
32 Bifurcation Ostial LAD Ostial LCX
33 Heavily calcified bifurcation i Rotablator? LMT to LAD or LMT to LCX or Both? We decided to ablate from LMT to ostial LCX to obtain more effective debulking of calcium.
34 Rotablator to LCX 1.75mm burr
35 Rotablator to LCX Post 1.75mm burr
36 Rotablator to LCX 2.25mm burr
37 Stent implantation Marking technique
38 Stent implantation Kissing balloon
39 Final CAG
40 Recommended procedure 1. IVUS catheter cannot cross the lesion, start Rotablator with 1.25 or 1.5mm burr depending on the vessel size and lesion length. 2. Image with IVUS following passage of Rotablator to identify degree of ablation, distribution, continuity and amount of residual calcium compared to the vessel size, and to decide to use larger size of the burr. 3. Dilate with adequate size of the balloon including scoring features, then perform stent implantation. ti
41 Summary 1. IVUS passage is another useful information to decide optimal strategy in heavily calcified lesions. 2. Guidwire bias of Rotablator can be predicted based on a position of the IVUS catheter within the lumen. 3. IVUS can demonstrate round shape calcium with reverberation which effectively ablated. 4. Based on these findings, heavily calcified lesions should be treated adequately at the time of a first PCI.
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