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Soohyung Park,Seung-Woon Rha,Byoung Geol Choi,Jae-Bin Seo,Ik Jun Choi,Sung-Il Woo,Soo-Han Kim,Tae Hoon Ahn,Jae Sang Kim,Ae-Young Her,Ji-Hun Ahn,Han Cheol Lee,Jaewoong Choi,Jin Soo Byon,Markz RMP Sinur The Korean Society of Cardiology 2024 Korean Circulation Journal Vol.54 No.6
Background and Objectives: Ultimaster<sup>TM</sup>, a third-generation sirolimus-eluting stent using biodegradable polymer, has been introduced to overcome long term adverse vascular events, such as restenosis or stent thrombosis. In the present study, we aimed to evaluate the 12-month clinical outcomes of Ultimaster<sup>TM</sup> stents in Korean patients with coronary artery disease. Methods: This study is a multicenter, prospective, observational registry across 12 hospitals. To reflect real-world clinical evidence, non-selective subtypes of patients and lesions were included in this study. The study end point was target lesion failure (TLF) (the composite of cardiac death, target vessel myocardial infarction [MI], and target lesion revascularization [TLR]) at 12-month clinical follow up. Results: A total of 576 patients were enrolled between November 2016 and May 2021. Most of the patients were male (76.5%), with a mean age of 66.0±11.2 years. Among the included patients, 40.1% had diabetes mellitus (DM) and 67.9% had acute coronary syndrome (ACS). At 12 months, the incidence of TLF was 4.1%. The incidence of cardiac death was 1.5%, MI was 1.0%, TLR was 2.7%, and stent thrombosis was 0.6%. In subgroup analysis based on the presence of ACS, DM, hypertension, dyslipidemia, or bifurcation, there were no major differences in the incidence of the primary endpoint. Conclusions: The present registry shows that Ultimaster<sup>TM</sup> stent is safe and effective for routine real-world clinical practice in non-selective Korean patients, having a low rate of adverse events at least up to 12 months.
Korean vs. Western Exercise Capacity Nomograms for Korean Patients With Cardiovascular Disease
Park Soohyung,Battumur Byambakhand,Yoon Seo Yeon,Lee Yohan,Park Se hyun,Lee Kyuho,Back Seungmin,Lee Jieun,Kang Dong Oh,Choi Jah Yeon,Roh Seung-Young,Na Jin Oh,Choi Cheol Ung,Kim Jin Won,Rha Seung-Woon 대한의학회 2023 Journal of Korean medical science Vol.38 No.23
Background: Exercise capacity is known to be an independent predictor of cardiovascular events and mortality. However, most previous studies were based on Western populations. Further study is warranted for Asian patients according to ethnic or national standards. We aimed to compare prognostic values of Korean and Western nomograms for exercise capacity in Korean patients with cardiovascular disease (CVD). Methods: In this retrospective cohort study, we enrolled 1,178 patients (62 ± 11 years; 78% male) between June 2015 and May 2020, who were referred for cardiopulmonary exercise testing in our cardiac rehabilitation program. The median follow-up period was 1.6 years. Exercise capacity was measured in metabolic equivalents by direct gas exchange method during the treadmill test. The nomogram for exercise capacity from healthy Korean individuals and a previous landmark Western study was used to determine the percentage of predicted exercise capacity. The primary endpoint was the composite of major adverse cardiovascular events (MACE; all-cause death, myocardial infarction, repeat revascularization, stroke and hospitalization for heart failure). Results: A multivariate analysis showed that the risk of primary endpoint was more than double (hazard ratio [HR], 2.20; 95% confidence interval [CI], 1.10–4.40) in the patients with lower exercise capacity (< 85% of predicted) by Korean nomogram. The lower exercise capacity was one of the strong independent predictors along with left ventricular ejection fraction, age, and level of hemoglobin. However, the lower exercise capacity by Western nomogram could not predict the primary endpoint (HR, 1.33; 95% CI, 0.85–2.10). Conclusion: Korean patients with CVD with lower exercise capacity have higher risk of MACE. Considering inter-ethnic differences in cardiorespiratory fitness, the Korean nomogram provides more suitable reference values than the Western nomogram to determine lower exercise capacity and predict cardiovascular events in Korean patients with CVD.
Park, Soohyung,Lee, Wontae Elsevier 2018 Science of the Total Environment Vol.640 No.-
<P><B>Abstract</B></P> <P>This study investigated the removal of selected pharmaceuticals and personal care products (PPCPs) in a simulated managed aquifer recharge (MAR) system. The PPCPs included antibiotic, antiepileptic, antihypertensive, anti-inflammatory, and antilipidemic drugs, contrast media, herbicides, and stimulants. We first monitored the occurrence and fate of 22 PPCPs at a water reclamation facility (WRF) in Korea, and found carbamazepine and primidone were not readily removed (below 25% removal in average) by the WRF. This reclaimed water passed through a laboratory-scale soil column set-up at 0.5 m/d over one year, simulating MAR system. Atenolol, propranolol, and trimethoprim exhibited higher removal rates (>80%) than other PPCPs through the simulated MAR, while atrazine, carbamazepine, lincomycin, primidone, and sulfamethazine were not readily removed, exhibiting removal rates below 20%. It can be efficient to monitor and manage these recalcitrant compounds at MAR systems to improve water quality.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Per monitoring of 22 PPCPs at a WRF in Korea, 15 substances were detected. </LI> <LI> Atenolol, propranolol and trimethoprim were removed >80% through MAR. </LI> <LI> Atrazine, carbamazepine, lincomycin and primidone were not readily removed. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Adsorption of acetaldehyde from air by activated carbon and carbon fibers
Soohyung Park,Muhammad Yaqub,Seunghan Lee,Wontae Lee 대한환경공학회 2022 Environmental Engineering Research Vol.27 No.2
The adsorption of acetaldehyde from air using various activated carbon and carbon fibers was investigated in this study. These adsorbents included activated carbon (AC), carbon fibers (CFs), activated carbon fibers (ACFs), and metal-coated carbon fibers (MCCFs) supplied by different manufacturers. AC was categorized as AC₁, AC₂, AC₃, and AC₄, CFs were denoted as ACF₁, while ACFs and MCCFs were expressed as ACF₂ and ACF₃, respectively. Five composite materials were prepared using the AC and ACFs in different ratios, and experiments were conducted to assess their acetaldehyde adsorption efficiency under dry and wet conditions. The results showed that the acetaldehyde adsorption efficiency of an impregnated AC₄ was higher (95.9%) than that of both non-impregnated AC₁ and AC₃ and an impregnated AC₂ after 1 min of operation. ACF₂ showed a higher acetaldehyde adsorption efficiency (50.9%) as compared to ACF₁ and ACF₃ because of its larger surface area and selective absorption capability after 1 min of operation. A composite material comprising 6.3 g of AC₄ and 1 g of ACF₂ showed the highest adsorption efficiency of 97.9% under dry conditions. However, this adsorption efficiency significantly decreased under wet conditions.
방사선 비상시 인지 기반 대피 행동의 HITL(Human-in-the-loop) 실험을 위한 선행 연구
박수형(Soohyung Park),김정식(Jeongsik Kim),김남훈(Namhun Kim) 한국HCI학회 2021 한국HCI학회 학술대회 Vol.2021 No.1
일반적으로 방사선 사고 비상대응계획은 국가 혹은 지자체의 대응과 같은 거시적 상황에 초점을 맞추고 있다. 그러나 후쿠시마 사태를 통해 대응 계획과 실제 상황간의 차이가 존재함이 드러났으며 거시적 상황을 기반으로 수립된 정책이 재난 시 주민 개인들에게는 실질적인 도움이 되지 않을 가능성은 충분하다. 따라서 주민들 관점에서의 실증적인 자료가 계획 수립에 반영되어야 하지만 대피자 개인 행동에 대한 정량적인 데이터가 부족한 상황이며 실험을 통한 자료 수집 역시 방사선의 위험성으로 인하여 제약이 존재한다. 이러한 한계를 극복하고자 본 연구에서는 후쿠시마 사태의 실증 자료를 분석하고 이를 토대로 대규모 소개 시 발생하는 긴급한 상황에서 의사결정을 실험할 수 있는 VR(Virtual Reality) 기반 HITL 시스템을 개발한다. 또한 구현된 시스템에서 매개 변수의 효과를 입증하기 위해 실제 상황을 모방한 실험을 수행하기 위한 기반을 마련한다.