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S-276 Immediate and late outcomes of percutaneous transluminal angioplasty in Buerger``s disease
( Daehoon Kim ),( Young-guk Ko ),( Chul-min Ahn ),( Dong-ho Shin ),( Jung-sun Kim ),( Byeong-keuk Kim ),( Donghoon Choi ),( Myeong-ki Hong ),( Yangsoo Jang ) 대한내과학회 2016 대한내과학회 추계학술발표논문집 Vol.2016 No.1
Objectives: The aim of this study was to appraise clinical outcomes after percutaneous transluminal angioplasty (PTA) for Buerger's disease patients with lower extremity artery disease. Methods: Between January 2006 and May 2015, 43 consecutive Buerger's disease patients with 48 target limbs were treated by PTA. The primary endpoint was clinically driven target lesion revascularization (TLR) at 24 months. Secondary endpoints included limb salvage rate, survival free from unexpected amputation, and changes in Rutherford class, ankle-brachial index (ABI). Results: Technical success using PTA was achieved in 35 (72.9%) of 48 limbs. The mean treated lesion length was 201±14 mm, including 39.6% multi-level lesions, 70.8% below-the-knee lesions, and 77.1% total occlusions. Clinical success rate was 70.8% with a significant improvement in Rutherford classes (p<0.001) and significantly increased ABIs, from 0.62±0.05 to 0.85±0.04 (p<0.001). At 24 months, the rate of clinically driven TLR was 23.1%, and limb salvage rate was 87.2% with 5 major amputations. The rate of freedom free from unexpected amputations was 91.7% with 3 unexpected amputations. Continuing smoking after PTA was the only independent predictor of TLR (HR: 5.10; 95% CI: 1.08 to 24.04, p=0.039).?Conclusions: PTA was feasible and effective for the revascularization in Buerger's disease patients. Technical success was achieved in the majority of the patients and the freedom free from clinically driven TLR and amputation at 2-year follow-up were favorable.
Ideal Blood Pressure in Patients With Atrial Fibrillation
Kim, Daehoon,Yang, Pil-Sung,Kim, Tae-Hoon,Jang, Eunsun,Shin, Hyejung,Kim, Ha Yan,Yu, Hee Tae,Uhm, Jae-Sun,Kim, Jong-Youn,Pak, Hui-Nam,Lee, Moon-Hyoung,Joung, Boyoung,Lip, Gregory Y.H. Elsevier 2018 JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY - Vol.72 No.11
<P><B>Abstract</B></P> <P><B>Background</B></P> <P>The 2017 American College of Cardiology/American Heart Association (ACC/AHA) Guideline for High Blood Pressure in Adults redefined hypertension as systolic blood pressure (BP) ≥130 mm Hg or diastolic BP ≥80 mm Hg. The optimal BP for patients with atrial fibrillation (AF) is uncertain.</P> <P><B>Objectives</B></P> <P>The goal of this study was to investigate the impacts of the 2017 ACC/AHA guideline and to determine the ideal BP threshold for the management of high BP in patients with AF.</P> <P><B>Methods</B></P> <P>This study analyzed data for 298,374 Korean adults with oral anticoagulant–naive, nonvalvular AF obtained from the National Health Insurance Service database from 2005 to 2015.</P> <P><B>Results</B></P> <P>According to the Seventh Report of the Joint National Committee on Prevention, Detection, Evaluation and Treatment of High Blood Pressure guideline, 62.2% of the individuals in our sample had hypertension. After applying the 2017 ACC/AHA guideline, 79.4% had hypertension, including 17.2% with newly redefined hypertension (130 to 139/80 to 89 mm Hg). Those with newly redefined hypertension had greater risks of major cardiovascular events (hazard ratio: 1.07; 95% confidence interval: 1.04 to 1.10; p < 0.001), ischemic stroke, intracranial hemorrhage, and heart failure admission, compared with nonhypertensive patients (<130/80 mm Hg). Among patients with AF undergoing hypertension treatment, patients with BP ≥130/80 mm Hg or <120/80 mm Hg were at significantly higher risks of major cardiovascular events than patients with BP of 120 to 129/<80 mm Hg.</P> <P><B>Conclusions</B></P> <P>Patients with AF and newly redefined hypertension according to the 2017 ACC/AHA guideline were at higher risk of major cardiovascular events, suggesting that the new BP threshold is beneficial for timely diagnosis and intervention. BP of 120 to 129/<80 mm Hg was the optimal BP treatment target for patients with AF undergoing hypertension treatment.</P> <P><B>Central Illustration</B></P> <P>[DISPLAY OMISSION]</P>
Hae Young Kim,Hye Jin Lee,Tae-lim Kim,EunYoung Kim,Daehoon Ham,Jaejoon Lee,Tayeun Kim,Ji Won Shin,Minkyoung Son,Jun Hun Sung,Zee-A Han 대한재활의학회 2020 Annals of Rehabilitation Medicine Vol.44 No.6
Objective To identify the prevalence and characteristics of neuropathic pain (NP) in patients with spinal cord injury (SCI) and to investigate associations between NP and demographic or disease-related variables. Methods We retrospectively reviewed medical records of patients with SCI whose pain was classified according to the International Spinal Cord Injury Pain classifications at a single hospital. Multiple statistical analyses were employed. Patients aged <19 years, and patients with other neurological disorders and congenital conditions were excluded. Results Of 366 patients, 253 patients (69.1%) with SCI had NP. Patients who were married or had traumatic injury or depressive mood had a higher prevalence rate. When other variables were controlled, marital status and depressive mood were found to be predictors of NP. There was no association between the prevalence of NP and other demographic or clinical variables. The mean Numeric Rating Scale (NRS) of NP was 4.52, and patients mainly described pain as tingling, squeezing, and painful cold. Females and those with below-level NP reported more intense pain. An NRS cut-off value of 4.5 was determined as the most appropriate value to discriminate between patients taking pain medication and those who did not. Conclusion In total, 69.1% of patients with SCI complained of NP, indicating that NP was a major complication. Treatment planning for patients with SCI and NP should consider that marital status, mood, sex, and pain subtype may affect NP, which should be actively managed in patients with an NRS ≥4.5.
Kim, Daehoon,Yang, Pil-Sung,Kim, Tae-Hoon,Uhm, Jae-Sun,Park, Junbeom,Pak, Hui-Nam,Lee, Moon-Hyoung,Joung, Boyoung UNKNOWN 2018 CIRCULATION JOURNAL Vol.82 No.8
<P>Conclusions: Comorbid AF in patients with osteoporosis was associated with an increased risk of bone fracture and death after fracture.</P>
U-shaped Reconfigurable Field-effect Transistor
Daehoon Wee,Hui Tae Kwon,Won Joo Lee,Hyun-Seok Choi,Yu Jeong Park,Boram Kim,Yoon Kim 대한전자공학회 2019 Journal of semiconductor technology and science Vol.19 No.1
We propose a novel reconfigurable fieldeffect transistor (RFET) featuring two verticallystacked gates and a U-shaped nanowire channel. Conventional RFETs have a relatively large unit cell size due to their configuration with multiple gates. However, the proposed device can solve this inherent disadvantage of RFET. In addition, it can have a long enough channel without additional area, so that excellent characteristics can be obtained without the short channel effects. The characteristics of the proposed device were examined by 3-D technology computer-aided design (TCAD) device simulation. The effect of some device parameters on the device performance were investigated. Also, the fabrication method is proposed.
Kim, Tae-Hoon,Yang, Pil-Sung,Kim, Daehoon,Yu, Hee Tae,Uhm, Jae-Sun,Kim, Jong-Youn,Pak, Hui-Nam,Lee, Moon-Hyoung,Joung, Boyoung,Lip, Gregory Y.H. American Heart Association 2017 Stroke Vol. No.
<P>Conclusions-The CHA(2)DS(2)-VASc score shows good performance in defining truly low-risk Asian patients with atrial fibrillation for stroke compared with CHADS(2) and ATRIA scores.</P>
Virtual Snooping Coherence for Multi-Core Virtualized Systems
Daehoon Kim,Chang Hyun Park,Hwanju Kim,Jaehyuk Huh IEEE 2016 IEEE transactions on parallel and distributed syst Vol.27 No.7
<P>Proliferation of virtualized systems opens a new opportunity to improve the scalability of multi-core architectures. Among the scalability bottlenecks in multi-cores, cache coherence has been one of the most critical problems. Although snoop-based protocols have been dominating commercial multi-core designs, it has been difficult to scale them for more cores, as snooping protocols require high network bandwidth and power consumption for snooping all the caches. In this paper, we propose a novel snoop-based cache coherence protocol, called virtual snooping, for virtualized multi-core architectures. Virtual snooping exploits memory isolation across virtual machines and prevents unnecessary snoop requests from crossing the virtual machine boundaries. Each virtual machine becomes a virtual snoop domain, consisting of a subset of the cores in a system. Although the majority of virtual machine memory is isolated, sharing of cachelines across VMs still occur. To address such data sharing, this paper investigates three factors, data sharing through the hypervisor, virtual machine relocation, and content-based sharing. In this paper, we explore the design space of virtual snooping with experiments on emulated and real virtualized systems including the mechanisms and overheads of the hypervisor. In addition, the paper discusses the scheduling impact on the effectiveness of virtual snooping.</P>