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Pil Sang Song,Seok-Woo Seong,Ji-Yeon Kim,Soo Yeon An,Mi Joo Kim,Kye Taek Ahn,Seon-Ah Jin,Jin-Ok Jeong,Jeong Hoon Yang,Joo-Yong Hahn,Hyeon-Cheol Gwon,Woo Jin Jang,Hyuck Jun Yoon,Jang-Whan Bae,Woong Gil 대한심장학회 2024 Korean Circulation Journal Vol.54 No.4
Background and Objectives: Concerns remain that early aspirin cessation may be associated with potential harm in subsets at high risk of ischemic events. This study aimed to assess the effects of P2Y12 inhibitor monotherapy after 3-month dual antiplatelet therapy (DAPT) vs. prolonged DAPT (12-month or longer) based on the ischemic risk stratification, the CHADS-P2A2RC, after percutaneous coronary intervention (PCI). Methods: This was a sub-study of the SMART-CHOICE trial. The effect of the randomized antiplatelet strategies was assessed across 3 CHADS-P2A2RC risk score categories. The primary outcome was a major adverse cardiac and cerebral event (MACCE), a composite of all-cause death, myocardial infarction, or stroke. Results: Up to 3 years, the high CHADS-P2A2RC risk score group had the highest incidence of MACCE (105 [12.1%], adjusted hazard ratio [HR], 2.927; 95% confidence interval [CI], 1.358–6.309; p=0.006) followed by moderate-risk (40 [1.4%], adjusted HR, 1.786; 95% CI, 0.868–3.674; p=0.115) and low-risk (9 [0.5%], reference). In secondary analyses, P2Y12 inhibitor monotherapy reduced the Bleeding Academic Research Consortium (BARC) types 2, 3, or 5 bleeding without increasing the risk of MACCE as compared with prolonged DAPT across the 3 CHADS-P2A2RC risk strata without significant interaction term (interaction p for MACCE=0.705 and interaction p for BARC types 2, 3, or 5 bleeding=0.055). Conclusions: The CHADS-P2A2RC risk score is valuable in discriminating high-ischemic-risk patients. Even in such patients with a high risk of ischemic events, P2Y12 inhibitor monotherapy was associated with a lower incidence of bleeding without increased risk of ischemic events compared with prolonged DAPT.
Park, Taek Kyu,Lee, Jae-Hwan,Song, Young Bin,Jeong, Jin-Ok,Hahn, Joo-Yong,Yang, Jeong Hoon,Choi, Seung-Hyuk,Choi, Jin-Ho,Lee, Sang Hoon,Jeong, Myung-Ho Europa Digital and Publishing 2016 EuroIntervention Vol.12 No.4
<P>Aims: Non-compliant balloons provide uniform radial force along the vessel wall at any inflation pressure. As a result, the use of non-compliant balloons may reduce side branch complications and optimise stent deployment. We sought to investigate the impact of non-compliant balloons on the long-term clinical outcomes of patients undergoing a coronary bifurcation intervention. Methods and results: A total of 2,897 patients treated with drug-eluting stents for bifurcation lesions were enrolled. Non-compliant balloons were used in 752 patients (26%). During a median three-year follow-up, major adverse cardiac events (MACE: cardiac death, myocardial infarction, or target lesion revascularisation) occurred less frequently in the non-compliant balloon group than in the compliant balloon group (8.2% versus 10.9%; p=0.03). After propensity score matching (710 pairs), the use of non-compliant balloons resulted in a lower rate of side branch dissection (0.1% versus 1.1%; p=0.046) and a higher rate of procedural success (79.0% versus 73.9%; p=0.01). The use of non-compliant balloons was associated with a lower risk of MACE (HR 0.64, 95% CI: 0.46-0.91; p=0.01) and cardiac death (HR 0.14, 95% CI: 0.03-0.64; p=0.01). Conclusions: The use of non-compliant balloons was associated with favourable procedural and long-term clinical outcomes in patients receiving coronary bifurcation intervention. ClinicalTrials.gov number: NCT01642992</P>
Park, Taek Kyu,Park, Yong Hwan,Song, Young Bin,Oh, Ju Hyeon,Chun, Woo Jung,Kang, Gu Hyun,Jang, Woo Jin,Hahn, Joo-Yong,Yang, Jeong Hoon,Choi, Seung-Hyuk,Choi, Jin-Ho,Lee, Sang Hoon,Jeong, Myung-Ho,Kim, Japanese Circulation Society 2015 Circulation journal Vol.79 No.9
<P>Little is known about the clinical outcomes of patients with different types of coronary bifurcation lesions. We sought to compare long-term clinical outcomes of patients with true or non-true bifurcation lesions who underwent percutaneous coronary intervention.Methods?and?Results:We compared major adverse cardiac events (MACE: cardiac death, myocardial infarction [MI], or target lesion revascularization) between 1,502 patients with true bifurcation lesions (51.8%) and 1,395 with non-true bifurcation lesions (48.2%). True bifurcation lesions were defined as Medina classification (1.1.1), (1.0.1), or (0.1.1) lesions. During a median follow-up of 36 months, MACE occurred in 296 (10.2%) patients. Patients with true bifurcation lesions had a significantly higher risk of MACE than those with non-true bifurcation lesions (HR 1.39; 95% CI 1.08-1.80; P=0.01). Among true bifurcation lesions, Medina (1.1.1) and (0.1.1) were associated with a higher risk of cardiac death or MI than Medina (1.0.1) (HR 4.15; 95% CI 1.01-17.1; P=0.05). During the procedure, side branch occlusion occurred more frequently in Medina (1.1.1) and (1.0.1) than Medina (0.1.1) lesions (11.5% vs. 7.4%, P=0.03).</P>
Park, Taek Kyu,Hahn, Joo-Yong,Yang, Jeong Hoon,Song, Young Bin,Choi, Seung-Hyuk,Choi, Jin-Ho,Lee, Sang Hoon,Ahn, Joonghyun,Carriere, Keumhee Cho,Gwon, Hyeon-Cheol Europa Digital and Publishing 2017 EuroIntervention Vol.13 No.1
<P>Conclusions: Complete revascularisation of lesions with >70% diameter stenosis in vessels 22.5 mm is better than ICR, and is a reasonable goal for patients with multivessel disease.</P>
The adequacy of conization in the management of adenocarcinoma in situ of the uterine cervix(초)
한호섭 ( Ho Suap Hahn ),( Mi La Kim ),( Seok Geun Yoon ),( Woo Chul Kim ),( Hong Jun Choi ),( Sung Ran Hong ),( Hy Sook Kim ),( Yong Soon Kwon ),( In Ho Lee ),( Kyung Taek Lim ),( Ki Heon Lee ),( Jae Uk 대한산부인과학회 2009 대한산부인과학회 학술대회 Vol.95 No.-
조성우,양정훈,Park Taek Kyu,Lee Joo Myung,Song Young Bin,Hahn Joo-Yong,Choi Jin-Ho,Gwon Hyeon-Cheol,Lee Sang Hoon,최승혁 대한의학회 2020 Journal of Korean medical science Vol.35 No.27
Background: Limited data are available on the clinical meaning of early routine exercise treadmill testing (ETT) after percutaneous coronary intervention (PCI) in the drug-eluting stent era. We aimed to determine the clinical utility and implications of early routine ETT after PCI. Methods: This was a single-center, prospective cohort study. A total of 776 patients underwent ETT within 3 months after index PCI were analyzed. We classified patients into ETT positive (+) and negative (−) groups and compared major adverse cardiac events (MACE) including all-cause death, myocardial infarction, and coronary revascularization. Results: The median follow-up duration was 19.6 months (interquartile range, 15.4 to 33.5 months). ETT was positive for 63 patients (17.1%) with single-vessel disease (VD) and 150 patients (36.9%) with multi-VD. Previous PCI, absence of thrombotic lesion, multi-VD, and residual Synergy Between PCI With Taxus and Cardiac Surgery (SYNTAX) score > 8 were independent predictors of ETT (+). Compared with the ETT (−) group, the ETT (+) group was associated with increased risk of MACE for patients with single-VD (18.1% vs. 52.3%; adjusted hazard ratio [HR], 2.67; 95% confidence interval [CI], 1.10–6.49; P = 0.03) and residual SYNTAX score ≤ 8 (26.5% vs. 42.1%; adjusted HR, 1.90; 95% CI, 1.09–3.30; P = 0.02), but not for patients with multi-VD and residual SYNTAX score > 8. Conclusion: Early routine ETT after PCI might be helpful for predicting clinical outcomes in patients with single-VD and residual SYNTAX score ≤ 8 but not multi-VD and residual SYNTAX score > 8.
QoS 서비스와 최선형 서비스를 위한 효율적인 MPLS 라우팅 시스템
전한얼,김성대,신용철,이재용,김형택,Jeon, Hahn-Earl,Kim, Sung-Dae,Shin, Yong-Chul,Lee, Jai-Yong,Kim, Hyung-Taek 한국통신학회 2003 韓國通信學會論文誌 Vol.28 No.1B
인터넷에서 트래픽의 폭발적인 증가로 인하여 데이터 흐름에 대한 서비스품질(QoS) 보장과 트래픽 엔지니어링 문제가 매우 중요하게 되었다 MPLS는 출발지와 목적지 사이에 다중의 경로를 사용하는 데 자유롭기 때문에 기존의 IP 라우팅보다 이러한 문제를 해결하는데 장점을 갖고 있다 특히 제한기반 최소 거리(CSPF) 알고리즘과 MPLS의 explicit 결로는 위의 문제를 해결하도록 해주었다. 그러나, CSPF 알고리즘은 QoS 제한 이내의 최소 거리 경로를 찾기 때문에 QoS가 만족되는 다른 경로를 찾을 수 없으며, 트래픽이 몰리는 정체가 발생하였을 경우 최선형(best-effort) 트래픽 데이터는 잃게 된다. 본 논문에서는 MPLS 망에서 트래픽을 분산시키는 라우팅을 통해 네트워크 자원을 최적으로 사용하는 방안을 제시한다 As the traffic grows rapidly in the Internet, the QoS guarantee of the flows and the traffic engineering problems have become very important issues. MPLS has more advantages to solve the problems than existing IP routing because of its use of multiple paths between the source and destination pairs Particularly, the availability of Constraint-based Shortest Path First(CSPF) algorithm and explicit route in MPLS made the problem referred above to be solved efficiently. However, the CSPF algorithm has the characteristic of selecting the shortest path of all paths which meet the traffics' QoS constraints Therefore, even though there are alternative paths to route traffic, alternate QoS paths may not be found and best-effort traffic will be dropped during congestion period In this paper, we present the network resource optimization method related to the traffic engineering by using load balancing through routing in MPLS network.
Jihoon Kim,Joo Myung Lee,Taek Kyu Park,Jeong Hoon Yang,Young Bin Song,Jin-Ho Choi,Seung-Hyuk Choi,Hyeon-Cheol Gwon,Sang Hoon Lee,Joo-Yong Hahn 대한의학회 2020 Journal of Korean medical science Vol.35 No.1
Background: Although current guidelines recommend noninvasive stress tests prior to elective percutaneous coronary intervention (PCI), it is unknown whether antecedent exercise stress test (EST) affects the outcomes of patients undergoing PCI for stable ischemic heart disease (SIHD). This study aimed to investigate long-term outcomes in patients undergoing elective PCI with or without EST. Methods: We studied 2,674 patients undergoing elective PCI using drug-eluting stents for SIHD. Patients were divided into the 2 groups: the test group underwent EST with a positive result within 180 days prior to PCI (n = 668), whereas the non-test group did not undergo any noninvasive stress tests (n = 2,006). The primary outcome was all-cause death or myocardial infarction (MI). Results: Over 5 years after the index PCI, the risk of all-cause death or MI was significantly lower in the test group than in the non-test group in overall population (3.3% vs. 10.9%; adjusted hazard ratio [HR], 0.34; 95% confidence interval [CI], 0.22–0.55; P < 0.001), and in propensity score-matched population (668 pairs) (3.3% vs. 6.3%; adjusted HR, 0.52; 95% CI, 0.30–0.89; P = 0.018). However, the incidence of any revascularization was similar between the 2 groups in overall (16.7% vs. 16.8%; adjusted HR, 0.99; 95% CI, 0.79–1.25; P = 0.962) and matched population (16.7% vs. 18.3%; adjusted HR, 0.91; 95% CI, 0.70–1.19; P = 0.509). Conclusion: Patients who underwent elective PCI with EST had a reduced risk of all-cause death or MI than those undergoing PCI without stress tests.