Paclitaxel Coating Reduces In-Stent Intimal Hyperplasia in Human Coronary Arteries
Why the study?
Do paclitaxel-coated stents reduce in-stent intimal hyperplasia compared to bare metal stents in patients undergoing coronary stenting?
Population
81 patients undergoing coronary stent implantation with complete post-stent and follow-up intravascular…
Comparison
Paclitaxel-coated stents vs Placebo (bare metal stents)
Design
RCT, randomized
Authors
Discussion
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Implication
Supports paclitaxel-eluting stents to curb restenosis risk; confirms dose-dependent efficacy in RCT and extends DES development data.
Key Points
- To evaluate the inhibitory effect of paclitaxel stent coatings on in-stent intimal hyperplasia using serial volumetric intravascular ultrasound.
- Randomized trial assessing 81 patients with complete post-stent and follow-up volumetric intravascular ultrasound (IVUS) data.
- Assigned patients to bare-metal control stents (n=25), low-dose paclitaxel stents (1.28 µg/mm², n=28), or high-dose paclitaxel stents (3.10 µg/mm², n=28).
- Performed volumetric IVUS analyses across stented segments and adjacent reference segments.
- Intimal hyperplasia volume decreased stepwise with dose: 31 ± 22 mm³ in controls, 18 ± 15 mm³ in low-dose, and 13 ± 14 mm³ in high-dose arms (P < 0.001).
- Intimal hyperplasia accumulation was significantly lower in low-dose (P = 0.009) and high-dose (P < 0.001) groups compared with control, with no difference between low- and high-dose groups (P = 0.2).
- Focal late malapposition occurred in 1 high-dose patient, with no significant volume alterations observed in reference segments across groups.
Structured PICO
Do paclitaxel-coated stents reduce in-stent intimal hyperplasia compared to bare metal stents in patients undergoing coronary stenting?
P
Population
81 patients undergoing coronary stent implantation with complete post-stent and follow-up intravascular ultrasound (IVUS) data
I
Intervention
Paclitaxel-coated stents (low dose: 1.28 microg/mm2 or high dose: 3.10 microg/mm2)
C
Comparator
Placebo (bare metal stents)
O
Outcome
In-stent intimal hyperplasia (IH) accumulation evaluated by serial volumetric intravascular ultrasound (IVUS)surrogate
Paclitaxel-coated stents effectively reduce in-stent neointimal tissue proliferation in human coronary arteries without causing significant edge restenosis or late malapposition.
Cite This Study
Hong et al. (2003) studied this question.