The influence of strut thickness and cell design on immediate apposition of drug-eluting stents assessed by optical coherence tomography

Comparison of Neointimal Coverage of Sirolimus-Eluting Stents and Paclitaxel-Eluting Stents Using Optical Coherence Tomography at 9 Months After Implantation

“…Stent malapposition was defined as struts that were detached from the vessel wall ≥160 μm for SES and ≥130 μm for PES regarding the differences in thickness of metal strut and polymer. 14,15 The degree of NIH was divided into 4 grades: grade 0, uncovered strut to total stent struts; grade 1, NIH thickness <100 μm, which was not detected with IVUS; grade 2, NIH thickness between 100 and 200 μm, which was between the minimal thickness detectable using OCT and the minimal mean thickness in BMS; and grade 3, NIH thickness over 200 μm. 16 The grade was determined as minimal and maximal grades including ≥10% of stent struts at each stent.…”

Tissue coverage of paclitaxel and sirolimus eluting stents in long term follow-up: Optical coherence tomography study

“…Stent apposition is another parameter which can be precisely assessed by OCT. The malappostion, defined as a separation of the stent struts from the intimal surface of the arterial wall at a distance greater than the strut thickness including the polymer, is caused mainly by positive remodeling and the absorption of the thrombus located between the stent and the vessel wall [13,14]. This definition mainly depends on the strut thickness and may lead to ambiguity in the recognition of malapposition between different types of stents.…”

SYNTAX Score and Pre- and Poststent Optical Coherence Tomography Findings in the Left Anterior Descending Coronary Artery in Patients With Stable Angina Pectoris

“…OCT evaluation before PCI included lipid rich plaque, lipid arc, lipid index, fibrous cap thickness (FCT), thincap fibroatheroma (TCFA), calcium deposits, and microchannels [7][8][9] . Post-stent OCT evaluation included mallaposition, stent edge dissection, intra-stent dissection, and irregular protrusion [10][11][12] . OCT images were analyzed by 2 investigators who were blinded to subject information, including SS.…”