Abstract:
:While older age associates with adverse percutaneous coronary intervention (PCI) outcomes, detailed information relating age to stent strut coverage and neointimal characteristics is lacking. One hundred nineteen patients with 123 sirolimus-eluting stents (SESs) were divided into 3 groups: group A (≤55 years), group B (56-65 years), and group C (>65 years). At 6 and 12 months of follow-up, optical coherence tomography was performed to assess strut coverage and neointimal remodeling. At 6 months, the proportion of uncovered struts increased with age: 6.1% in group A versus 7.3% in group B versus 11.7% in group C (P < 0.001) while the proportion of embedded struts decreased: 72.1% versus 57.0% vs. 55.0%, respectively (P < 0.001). Mean neointimal thicknesses were 90 μm versus 60 μm versus 60 μm, respectively (P < 0.001), and neointimal areas were 0.82 mm2 versus 0.52 mm2 versus 0.57 mm2 (P < 0.001). At 12 months, the proportion of uncovered struts increased with age (3.9% vs. 3.3% vs. 4.9 %; P < 0.001), while mean neointimal thicknesses were 100 versus 70 versus 80 μm (P < 0.001) and neointimal areas were 0.87 versus 0.60 versus 0.67 mm2 (P < 0.001). Patients ≤55 years receiving SES showed highest strut coverage and neointimal repair rate compared with the other 2 groups. A "catch-up phenomenon" appeared to occur in the oldest patients, as in the first 6 months the neointima showed lowest endothelial cell coverage and lowest neointimal proliferation rate, whereas from 6 to 12 months, the highest neointimal proliferation rate was seen in the oldest patients.
journal_name
Medicine (Baltimore)journal_title
Medicineauthors
Han Z,Feng L,Du H,Sun Z,Hu S,Dai J,Sun M,Xing L,Hou J,Zhang S,Yu Bdoi
10.1097/MD.0000000000002246subject
Has Abstractpub_date
2015-12-01 00:00:00pages
e2246issue
50eissn
0025-7974issn
1536-5964pii
00005792-201512150-00035journal_volume
94pub_type
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