Six-month clinical and angiographic outcome of the new, less shortening Wallstent in native coronary arteries

Yukio Ozaki, David Keane, Peter Ruygrok, Willem J. Van Der Giessen, Pim De Feyter, Patrick W. Serruys

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35 Citations (Scopus)

Abstract

Background: The new, less shortening, self-expanding Wallstent is characterized by longitudinal flexibility, a protective membrane, a low profile, and a customized range of diameters (3.5 to 6.0 mm). The recent modification of the braiding angle of the Wallstent has resulted in anew device with less shortening on expansion and a concomitant reduction in radial force. We hypothesized that the enforced mechanical remodeling produced by the selection of an oversized Wallstent might result in improved accommodation of subsequent reactive intimal hyperplasia and prevention of chronic recoil of the vessel. Methods and Results: To prove this hypothesis, we recently implanted 44 new, less shortening Wallstents in 35 native coronary arteries in 35 patients with acute or threatened closure after balloon angioplasty, according to a strategy of oversizing of Wallstent diameter and complete coverage of the lesion length. The initial and 6-month follow-up angiogram were analyzed with a computer-based quantitative coronary angiography (QCA) system. Acute gain (minimal luminal diameter [MLD] post minus MLD pre) and late loss (MLD post minus MLD at follow-up) were examined. Stent deployment was successful in 44 of 44 attempts (100%). Nominant stent diameter used was 1,40 mm larger than the maximal vessel diameter. One patient (3%) with a dilated but unstended lesion proximal to the stended segment sustained a subacute occlusion on day 1 associated with myocardial infarction. Event-free survival at 30 days after stent implantation was 97% (34 of 35 patients). Of the 34 patients eligible for 6-month angiographic follow-up 3 who were asymptomatic declined repeat angiography. MLD (and percent diameter stenosis [% DS]) changed from 0.83 ± 0.50 mm (72%) pre through 3.06 ± 0.48 mm (15%) post to 2.27% ± 0.74 mm (28%) at follow-up. Acute gain was 2.23 ± 0.63 mm, and late loss was 0.78 ± 0.61 mm. Angiographic restenosis (>50% DS) was observed in 5 of 31 patients (16%) at 6 months, all of whom underwent repeat angioplasty. Thus, the overall event- free survival at 6-months follow-up was 83% (29 of 35 patients). Conclusions: The oversized Wallstent implantation with complete coverage of lesion length conveyed a favorable 6-month clinical and angiographic outcome. The large acute gain obtained by the Wallstent afforded greater accommodation of the subsequent late loss. The enforced mechanical remodeling by oversized new Wallstents may result in prevention of acute and chronic recoil of the vessel wall and subsequently a lower restenosis rate at follow-up.

Original languageEnglish
Pages (from-to)2114-2120
Number of pages7
JournalCirculation
Volume93
Issue number12
DOIs
Publication statusPublished - 15-06-1996
Externally publishedYes

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Coronary Vessels
Stents
Disease-Free Survival
Angiography
Tunica Intima
Balloon Angioplasty
Coronary Angiography
Angioplasty
Hyperplasia
Pathologic Constriction
Myocardial Infarction
Equipment and Supplies
Membranes

All Science Journal Classification (ASJC) codes

  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

Cite this

Ozaki, Yukio ; Keane, David ; Ruygrok, Peter ; Van Der Giessen, Willem J. ; De Feyter, Pim ; Serruys, Patrick W. / Six-month clinical and angiographic outcome of the new, less shortening Wallstent in native coronary arteries. In: Circulation. 1996 ; Vol. 93, No. 12. pp. 2114-2120.
@article{f184ff53ef874c2bb0cc886b5754bd19,
title = "Six-month clinical and angiographic outcome of the new, less shortening Wallstent in native coronary arteries",
abstract = "Background: The new, less shortening, self-expanding Wallstent is characterized by longitudinal flexibility, a protective membrane, a low profile, and a customized range of diameters (3.5 to 6.0 mm). The recent modification of the braiding angle of the Wallstent has resulted in anew device with less shortening on expansion and a concomitant reduction in radial force. We hypothesized that the enforced mechanical remodeling produced by the selection of an oversized Wallstent might result in improved accommodation of subsequent reactive intimal hyperplasia and prevention of chronic recoil of the vessel. Methods and Results: To prove this hypothesis, we recently implanted 44 new, less shortening Wallstents in 35 native coronary arteries in 35 patients with acute or threatened closure after balloon angioplasty, according to a strategy of oversizing of Wallstent diameter and complete coverage of the lesion length. The initial and 6-month follow-up angiogram were analyzed with a computer-based quantitative coronary angiography (QCA) system. Acute gain (minimal luminal diameter [MLD] post minus MLD pre) and late loss (MLD post minus MLD at follow-up) were examined. Stent deployment was successful in 44 of 44 attempts (100{\%}). Nominant stent diameter used was 1,40 mm larger than the maximal vessel diameter. One patient (3{\%}) with a dilated but unstended lesion proximal to the stended segment sustained a subacute occlusion on day 1 associated with myocardial infarction. Event-free survival at 30 days after stent implantation was 97{\%} (34 of 35 patients). Of the 34 patients eligible for 6-month angiographic follow-up 3 who were asymptomatic declined repeat angiography. MLD (and percent diameter stenosis [{\%} DS]) changed from 0.83 ± 0.50 mm (72{\%}) pre through 3.06 ± 0.48 mm (15{\%}) post to 2.27{\%} ± 0.74 mm (28{\%}) at follow-up. Acute gain was 2.23 ± 0.63 mm, and late loss was 0.78 ± 0.61 mm. Angiographic restenosis (>50{\%} DS) was observed in 5 of 31 patients (16{\%}) at 6 months, all of whom underwent repeat angioplasty. Thus, the overall event- free survival at 6-months follow-up was 83{\%} (29 of 35 patients). Conclusions: The oversized Wallstent implantation with complete coverage of lesion length conveyed a favorable 6-month clinical and angiographic outcome. The large acute gain obtained by the Wallstent afforded greater accommodation of the subsequent late loss. The enforced mechanical remodeling by oversized new Wallstents may result in prevention of acute and chronic recoil of the vessel wall and subsequently a lower restenosis rate at follow-up.",
author = "Yukio Ozaki and David Keane and Peter Ruygrok and {Van Der Giessen}, {Willem J.} and {De Feyter}, Pim and Serruys, {Patrick W.}",
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Ozaki, Y, Keane, D, Ruygrok, P, Van Der Giessen, WJ, De Feyter, P & Serruys, PW 1996, 'Six-month clinical and angiographic outcome of the new, less shortening Wallstent in native coronary arteries', Circulation, vol. 93, no. 12, pp. 2114-2120. https://doi.org/10.1161/01.CIR.93.12.2114

Six-month clinical and angiographic outcome of the new, less shortening Wallstent in native coronary arteries. / Ozaki, Yukio; Keane, David; Ruygrok, Peter; Van Der Giessen, Willem J.; De Feyter, Pim; Serruys, Patrick W.

In: Circulation, Vol. 93, No. 12, 15.06.1996, p. 2114-2120.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Six-month clinical and angiographic outcome of the new, less shortening Wallstent in native coronary arteries

AU - Ozaki, Yukio

AU - Keane, David

AU - Ruygrok, Peter

AU - Van Der Giessen, Willem J.

AU - De Feyter, Pim

AU - Serruys, Patrick W.

PY - 1996/6/15

Y1 - 1996/6/15

N2 - Background: The new, less shortening, self-expanding Wallstent is characterized by longitudinal flexibility, a protective membrane, a low profile, and a customized range of diameters (3.5 to 6.0 mm). The recent modification of the braiding angle of the Wallstent has resulted in anew device with less shortening on expansion and a concomitant reduction in radial force. We hypothesized that the enforced mechanical remodeling produced by the selection of an oversized Wallstent might result in improved accommodation of subsequent reactive intimal hyperplasia and prevention of chronic recoil of the vessel. Methods and Results: To prove this hypothesis, we recently implanted 44 new, less shortening Wallstents in 35 native coronary arteries in 35 patients with acute or threatened closure after balloon angioplasty, according to a strategy of oversizing of Wallstent diameter and complete coverage of the lesion length. The initial and 6-month follow-up angiogram were analyzed with a computer-based quantitative coronary angiography (QCA) system. Acute gain (minimal luminal diameter [MLD] post minus MLD pre) and late loss (MLD post minus MLD at follow-up) were examined. Stent deployment was successful in 44 of 44 attempts (100%). Nominant stent diameter used was 1,40 mm larger than the maximal vessel diameter. One patient (3%) with a dilated but unstended lesion proximal to the stended segment sustained a subacute occlusion on day 1 associated with myocardial infarction. Event-free survival at 30 days after stent implantation was 97% (34 of 35 patients). Of the 34 patients eligible for 6-month angiographic follow-up 3 who were asymptomatic declined repeat angiography. MLD (and percent diameter stenosis [% DS]) changed from 0.83 ± 0.50 mm (72%) pre through 3.06 ± 0.48 mm (15%) post to 2.27% ± 0.74 mm (28%) at follow-up. Acute gain was 2.23 ± 0.63 mm, and late loss was 0.78 ± 0.61 mm. Angiographic restenosis (>50% DS) was observed in 5 of 31 patients (16%) at 6 months, all of whom underwent repeat angioplasty. Thus, the overall event- free survival at 6-months follow-up was 83% (29 of 35 patients). Conclusions: The oversized Wallstent implantation with complete coverage of lesion length conveyed a favorable 6-month clinical and angiographic outcome. The large acute gain obtained by the Wallstent afforded greater accommodation of the subsequent late loss. The enforced mechanical remodeling by oversized new Wallstents may result in prevention of acute and chronic recoil of the vessel wall and subsequently a lower restenosis rate at follow-up.

AB - Background: The new, less shortening, self-expanding Wallstent is characterized by longitudinal flexibility, a protective membrane, a low profile, and a customized range of diameters (3.5 to 6.0 mm). The recent modification of the braiding angle of the Wallstent has resulted in anew device with less shortening on expansion and a concomitant reduction in radial force. We hypothesized that the enforced mechanical remodeling produced by the selection of an oversized Wallstent might result in improved accommodation of subsequent reactive intimal hyperplasia and prevention of chronic recoil of the vessel. Methods and Results: To prove this hypothesis, we recently implanted 44 new, less shortening Wallstents in 35 native coronary arteries in 35 patients with acute or threatened closure after balloon angioplasty, according to a strategy of oversizing of Wallstent diameter and complete coverage of the lesion length. The initial and 6-month follow-up angiogram were analyzed with a computer-based quantitative coronary angiography (QCA) system. Acute gain (minimal luminal diameter [MLD] post minus MLD pre) and late loss (MLD post minus MLD at follow-up) were examined. Stent deployment was successful in 44 of 44 attempts (100%). Nominant stent diameter used was 1,40 mm larger than the maximal vessel diameter. One patient (3%) with a dilated but unstended lesion proximal to the stended segment sustained a subacute occlusion on day 1 associated with myocardial infarction. Event-free survival at 30 days after stent implantation was 97% (34 of 35 patients). Of the 34 patients eligible for 6-month angiographic follow-up 3 who were asymptomatic declined repeat angiography. MLD (and percent diameter stenosis [% DS]) changed from 0.83 ± 0.50 mm (72%) pre through 3.06 ± 0.48 mm (15%) post to 2.27% ± 0.74 mm (28%) at follow-up. Acute gain was 2.23 ± 0.63 mm, and late loss was 0.78 ± 0.61 mm. Angiographic restenosis (>50% DS) was observed in 5 of 31 patients (16%) at 6 months, all of whom underwent repeat angioplasty. Thus, the overall event- free survival at 6-months follow-up was 83% (29 of 35 patients). Conclusions: The oversized Wallstent implantation with complete coverage of lesion length conveyed a favorable 6-month clinical and angiographic outcome. The large acute gain obtained by the Wallstent afforded greater accommodation of the subsequent late loss. The enforced mechanical remodeling by oversized new Wallstents may result in prevention of acute and chronic recoil of the vessel wall and subsequently a lower restenosis rate at follow-up.

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