https://scholarworks.korea.ac.kr/kumedicine/handle/2020.sw.kumedicine/346 2026-04-04T19:00:45Z https://scholarworks.korea.ac.kr/kumedicine/handle/2021.sw.kumedicine/63190 Title: SUPERA stent placement for salvaging early recurrent arteriovenous graft thrombosis after percutaneous transluminal angioplasty: A single-center study Authors: Lee, Hyoung Nam; Park, Sung-Joon; Cho, Youngjong; Lee, Sangjoon Abstract: Background The aim of this study was to evaluate the patency of the helical interwoven SUPERA stent for salvaging prosthetic arteriovenous (AV) grafts with rapidly recurrent thrombotic occlusion developed within a short time period after successful percutaneous transluminal angioplasty. Methods From December 2019 to September 2021, the data of 20 patients with AV graft who had the SUPERA stent inserted satisfying the following conditions were consecutively collected. (1) More than 1 year has passed since the AV access operation; (2) Thrombotic re-occlusion of AV graft occurred within 3 months after previous successful endovascular treatment; (3) Residual stenosis is greater than 30% after full effacement of balloon angioplasty in the primary lesion. Post-interventional target lesion primary patency (TLPP), access circuit primary patency (ACPP), and secondary patency (SP) were calculated. Results Primary lesions of early recurrent arteriovenous graft thrombosis were found in 13 patients with graft–vein anastomosis, six patients with intra-graft stenosis, and one patient with outflow vein complications. The lesions showed residual stenosis in 47.4% (interquartile range: 44.1%–55.3%) of patients despite full-effacement balloon angioplasty. Clinical success was achieved in all patients with full-expansion of the stents at the 1-month follow-up. The TLPP was 70.7% and 32% at 6 and 12 months, respectively, and ACPP was 47.5% and 6.8% at 6 and 12 months, respectively. The SP was 76.1% and 57.1% at 6 and 12 months, respectively. No cannulation complications occurred in the six patients with installation inside the graft. No hemodialysis or stent fracture occurred in any patient during the follow-up period. Conclusions The SUPERA stent may have a role in salvaging AV grafts with early recurrent thrombosis due to its greater radial force and its conformability and can be useful in treating stenosis involving the elbow or axilla, with fair patency and low complication rates. 2024-07-01T00:00:00Z https://scholarworks.korea.ac.kr/kumedicine/handle/2021.sw.kumedicine/64360 Title: T2 Black Synovitis in Musculoskeletal MRI: Disease Spectrum and Imaging Characteristics of Joint Diseases Authors: Kang, Woo Young; Hong, Suk-Joo; Woo, Ok Hee; Kang, Chang Ho; Ahn, Kyung-Sik; Kim, Baek Hyun; Shim, Euddeum Abstract: The synovium may be affected by a wide spectrum of disorders, including inflammatory, infectious, degenerative, traumatic, hemorrhagic, and tumorous conditions. Magnetic resonance imaging (MRI) is a valuable imaging modality to characterize synovial disorders. Most abnormal lesions appear as areas of nonspecific high signal intensity on T2-weighted images (T2-WI) due to high water content or increased perfusion. However, T2 hypointensity can be attributed to blood components of varying ages, calcification, inorganic crystals, fibrosis, caseous necrosis and/or amyloid deposition. Hypointense lesions on T2-WI are infrequent and additional clinical and imaging characteristics can help to limit the list of differential diagnoses, which may include tenosynovial giant cell tumor, synovial chondromatosis, rheumatoid arthritis, tuberculous arthritis, chronic tophaceous gout, amyloid arthropathy, synovial hemangioma, lipoma arborescens and hemosiderotic synovitis. Recently, susceptibility weighted imaging has been developed and may contribute to more accurate diagnosis for deoxygenated blood and calcium. We review the MRI features of hypointense synovial lesions on MRI and emphasize the characteristic findings that suggest a correct diagnosis. 2024-06-01T00:00:00Z https://scholarworks.korea.ac.kr/kumedicine/handle/2021.sw.kumedicine/64369 Title: Reply to Letter to the Editor: "Ultrasound-guided genitofemoral nerve block for femoral arterial access gain and closure: a randomized controlled trial" Authors: Lee, Hyoung Nam; Cho, Youngjong; Park, Sung-Joon; Lee, Sangjoon; Heo, Nam Hun Abstract: [No abstract available] 2024-02-01T00:00:00Z https://scholarworks.korea.ac.kr/kumedicine/handle/2021.sw.kumedicine/63991 Title: Impact of leaflet thrombosis on valve haemodynamic status after transcatheter aortic valve replacement Authors: Jang, Mi Hee; Ahn, Jung-Min; Kang, Do-Yoon; Kim, Kyung Won; Koo, Hyun Jung; Yang, Dong Hyun; Jung, Seung Chai; Kim, Byungjun; Wong, Yiu Tung Anthony; Lam, Cheung Chi Simon; Yin, Wei-Hsian; Wei, Jeng; Lee, Yung-Tsai; Kao, Hsien-Li; Lin, Mao-Shin; Ko, Tsung-Yu; Kim, Won-Jang; Kang, Se Hun; Ko, Euihong; Lee, Seung-Ah; Kim, Dae-Hee; Kim, Hoyun; Choi, Yeonwoo; Lee, Jinho; Park, Seung-Jung; Park, Duk-Woo Abstract: Objectives The effect of subclinical leaflet thrombosis, characterised by hypoattenuated leaflet thickening (HALT), on the valve haemodynamic function and durability of the bioprosthetic valve, is not yet determined. We determined the impact of HALT on valve haemodynamics after transcatheter aortic valve replacement (TAVR) and the predictors of haemodynamic structural valve deterioration (SVD). Methods The Anticoagulation vs Dual Antiplatelet Therapy for Prevention of Leaflet Thrombosis and Cerebral Embolization after Transcatheter Aortic Valve Replacement(ADAPT-TAVR) trial is a multicenter, randomised trial that compared edoxaban and dual antiplatelet therapy in patients who had undergone successful TAVR. The presence of HALT was evaluated by four-dimensional CT at 6 months and serial echocardiography performed at baseline, immediately post-TAVR and after 6 months. SVD was defined as at least one of the following: (1) mean transprosthetic gradient >= 20 mm Hg, (2) change in the mean gradient >= 10 mm Hg from baseline, or (3) new or increase in intraprosthetic aortic regurgitation of at least >= 1 grade, resulting in moderate or greater regurgitation. Results At 6 months, HALT was found in 30 of 211 (14.2%) patients. The presence of HALT did not significantly affect aortic valve mean gradients (with vs without HALT; 14.0 +/- 4.8 mm Hg vs 13.7 +/- 5.5 mm Hg; p=0.74) at 6 months. SVD was reported in 30 of 206 patients (14.6%) at 6-month follow-up echocardiography. Older age (OR: 1.138; 95% CI: 1.019 to 1.293; p=0.033), use of aortic valve size <= 23 mm (OR: 6.254; 95% CI: 2.230 to 20.569; p=0.001) and mean post-TAVR pressure gradient (OR: 1.233; 95% CI: 1.123 to 1.371; p<0.001) were independent predictors of haemodynamic SVD; however, the presence of HALT was not identified as a predictor of SVD. Conclusions In patients who had undergone successful TAVR, aortic valve haemodynamic status was not influenced by the presence of HALT. Although HALT was not a predictor of haemodynamic SVD at 6 months, it warrants further longer-term follow-up to evaluate the effect on long-term valve durability. 2024-01-01T00:00:00Z