Long-Term Intracoronary Structural and Vasomotor Assessment of the ABSORB Bioresorbable Vascular Scaffold

• Published in: The American journal of cardiology Vol. 168; pp. 55 - 63
• Main Authors: Altisent, Omar Abdul-Jawad, Goncalves-Ramírez, Luis Renier, Fernández, Leticia, Viladés, David, Gutiérrez, Enrique, Mitomo, Satoru, Latib, Azeem, Córdoba-Soriano, Juan Gabriel, Adeliño, Raquel, Amat-Santos, Ignacio, Muñoz, Juan Francisco, Elízaga, Jaime, Bezzera, Hiram, Pereira, Gabriel Tensol Rodrigues, de Prado, Armando Pérez, Carrillo, Xavier, Fernández-Nofrerias, Eduard, Vilalta, Victoria, Rodríguez-Leor, Oriol, Llibre, Cinta, Fadeuilhe, Edgar, Trujillo, Aaron, Mauri, Josepa, de la Torre Hernández, Jose M., Bayes-Genís, Antoni, Puri, Rishi
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.04.2022; Elsevier Limited
• Subjects: Absorbable Implants; Acute coronary syndromes; Aged; Angina pectoris; Angiography; Apposition; Biocompatibility; Biomedical materials; Coronary Angiography; Coronary vessels; Coronary Vessels - diagnostic imaging; Coronary Vessels - pathology; Coronary Vessels - surgery; Drug dosages; Drug-Eluting Stents; Endothelium; Female; Gender; Healing; Humans; Hyperplasia; Hypertension; Laboratories; Male; Medical imaging; Middle Aged; Neointima - pathology; Optical Coherence Tomography; Patients; Percutaneous Coronary Intervention; Prosthesis Design; Regression analysis; Scaffolds; Segments; Software; Structure-function relationships; Struts; Tomography; Tomography, Optical Coherence; Treatment Outcome; Vasodilation; Veins & arteries
• ISSN: 0002-9149; 1879-1913
• DOI: 10.1016/j.amjcard.2021.12.037

We systematically categorized the longer-term (≥3 years) structural and functional characteristics of the ABSORB bioresorbable vascular scaffold (BVS) using optical coherence tomography imaging and coronary vasomotor reactivity testing and further compared the functional characteristics of BVS stented versus remote coronary segments. A total of 92 patients (mean age 56.4 ± 9.7 years, 22.8% women) who underwent percutaneous coronary intervention (76% with acute coronary syndrome) using the ABSORB BVS (112 lesions) were included. Optical coherence tomography analysis (38,790 visible struts) comprised in-segment quantitative lumen/plaque and semiquantitative plaque composition analysis of the neointimal pattern. Epicardial endothelium-dependent and-independent vasomotion was defined as any vasodilatation at low/intermediate intracoronary dose of acetylcholine (ACh) and nitroglycerine, assessed using quantitative coronary angiography. At a median time of 3.2 years follow-up, 79.8% of BVS segments still demonstrated visible struts with a predominant neointimal fibrotic healing pattern in 84% of BVS segments, with 99.5% of struts demonstrating coverage with apposition. Compared with remote segments, BVS segments demonstrated less endothelium-dependent vasodilatation at low (p = 0.06) and intermediate ACh doses (p = 0.04). Hypertension, longer time interval from index percutaneous coronary intervention, and the degree of in-BVS segment neointimal volume (p <0.03 for all) were each independently associated with abnormal BVS endothelium-dependent vasomotor function. Endothelium-independent function was more likely preserved in non-BVS (remote) segments compared with BVS segments (p = 0.06). In conclusion, at 3+ years post-ABSORB BVS insertion, the rate of complete scaffold resorption was low and residual strut presence was high, with a dominant fibrous healing response contributing toward neointimal hyperplasia and endothelium-dependent and-independent vasomotor dysfunction.