Published in:
Open Access
01-08-2012 | Original Paper
Analysis of 1 year virtual histology changes in coronary plaque located behind the struts of the everolimus eluting bioresorbable vascular scaffold
Authors:
Salvatore Brugaletta, Josep Gomez-Lara, Hector M. Garcia-Garcia, Jung Ho Heo, Vasim Farooq, Robert J. van Geuns, Bernard Chevalier, Stephan Windecker, Dougal McClean, Leif Thuesen, Robert Whitbourn, Ian Meredith, Cecile Dorange, Susan Veldhof, Richard Rapoza, John A. Ormiston, Patrick W. Serruys
Published in:
The International Journal of Cardiovascular Imaging
|
Issue 6/2012
Login to get access
Abstract
Serial intravascular ultrasound virtual histology (IVUS-VH) after implantation of metallic stents has been unable to show any changes in the composition of the scaffolded plaque overtime. The everolimus-eluting ABSORB scaffold potentially allows for the formation of new fibrotic tissue on the scaffolded coronary plaque during bioresorption. We examined the 12 month IVUS-VH changes in composition of the plaque behind the struts (PBS) following the implantation of the ABSORB scaffold. Using IVUS-VH and dedicated software, the composition of the PBS was analyzed in all patients from the ABSORB Cohort B2 trial, who were imaged with a commercially available IVUS-VH console (s5i system, Volcano Corporation, Rancho Cordova, CA, USA), immediately post-ABSORB implantation and at 12 month follow-up. Paired IVUS-VH data, recorded with s5i system, were available in 17 patients (18 lesions). The analysis demonstrated an increase in mean PBS area (2.39 ± 1.85 mm2 vs. 2.76 ± 1.79 mm2, P = 0.078) and a reduction in the mean lumen area (6.37 ± 0.90 mm2 vs. 5.98 ± 0.97 mm2, P = 0.006). Conversely, a significant decrease of 16 and 30% in necrotic core (NC) and dense calcium (DC) content, respectively, were evident (median % NC from 43.24 to 36.06%, P = 0.016; median % DC from 20.28 to 11.36%, P = 0.002). Serial IVUS-VH analyses of plaque located behind the ABSORB struts at 12-month demonstrated an increase in plaque area with a decrease in its NC and DC content. Larger studies are required to investigate the clinical impact of these findings.