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https://www.readbyqxmd.com/read/29248661/mitral-valve-adaptation-to-isolated-annular-dilation-insights-into-the-mechanism-of-atrial-functional-mitral%C3%A2-regurgitation
#1
Dae-Hee Kim, Ran Heo, Mark D Handschumacher, Sahmin Lee, Yun-Sil Choi, Kyu-Ri Kim, Yewon Shin, Hong-Kyung Park, Joyce Bischoff, Elena Aikawa, Jong-Min Song, Duk-Hyun Kang, Robert A Levine, Jae-Kwan Song
OBJECTIVES: This study hypothesized that compensatory mitral leaflet area (MLA) adaptation occurs in patients with persistent atrial fibrillation (AF) without left ventricular (LV) dysfunction but has limitations that augment mitral regurgitation (MR). The study also explored whether asymmetrical annular dilation is matched by relative leaflet enlargement. BACKGROUND: Functional MR occurs in patients with AF and isolated annular dilation, but the relationship of MLA adaptation with annular area (AA) is unknown...
December 8, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29245779/optimum-thickness-of-epsilon-negative-tri-metal-layer-electrodes-for-maximizing-oled-outcoupling-efficiency
#2
The Viet Hoang, Song Eun Lee, Jae-Gon Lee, Young Kwan Kim, Jeong-Hae Lee
A transparent electrode is an essential component that has a strong influence on the extraction of light from organic light-emitting diodes (OLEDs) due to its effect on both electrical and optical performance. In this work, we present theoretical studies, full wave simulations, and experimental results to evaluate the influence of the thickness of epsilon negative tri-metal layer (TML) electrodes on the performance of red phosphorescent OLEDs (PHOLEDs) via an optical microcavity effect. The results show that the external quantum efficiency of the optimized TML-based red PHOLED of 17...
December 11, 2017: Optics Express
https://www.readbyqxmd.com/read/29223427/late-outcome-of-percutaneous-mitral-commissurotomy-randomized-comparison-of-inoue-versus-double-balloon-technique
#3
RANDOMIZED CONTROLLED TRIAL
Sahmin Lee, Duk-Hyun Kang, Dae-Hee Kim, Jong-Min Song, Jae-Kwan Song, Seong-Wook Park, Seung-Jung Park
BACKGROUND: Late prognosis after successful percutaneous mitral commissurotomy (PMC) is unclear. We compared late results of PMC using Inoue versus double-balloon techniques up to 25 years in a randomized trial. METHODS: Between 1989 and 1995, 302 patients (77 men, 41 ± 11 years) with severe mitral stenosis were randomly assigned to undergo PMC using Inoue (n = 152; group I) or double-balloon technique (n = 150; group D). The end points were the composite events of death, mitral surgery, repeat PMC, or deterioration of New York Heart Association (NYHA) class ≥3...
December 2017: American Heart Journal
https://www.readbyqxmd.com/read/29171200/clinical-characteristics-of-korean-patients-with-bicuspid-aortic-valve-who-underwent-aortic-valve-surgery
#4
Byung Joo Sun, Xin Jin, Jae Kwan Song, Sahmin Lee, Ji Hye Lee, Jun Bean Park, Seung Pyo Lee, Dae Hee Kim, Sung Ji Park, Yong Jin Kim, Goo Yeong Cho, Jong Min Song, Duk Hyun Kang, Dae Won Sohn
BACKGROUND AND OBJECTIVES: Clinical data for Korean patients with bicuspid aortic valve (BAV) that underwent aortic valve (AV) surgery are currently limited. METHODS: Data for 1,160 consecutive adult BAV patients who underwent AV surgery from 2000 to 2014 in 4 tertiary referral centers were retrospectively analyzed. A standard Case Reports form was used for clinical and echocardiographic parameters. RESULTS: Mean age at the time of AV surgery was 59±13 years...
November 10, 2017: Korean Circulation Journal
https://www.readbyqxmd.com/read/29158019/impact-of-significant-mitral-regurgitation-on-assessing-the-severity-of-aortic-stenosis
#5
Pil Hyung Lee, Jung Ae Hong, Byung Joo Sun, Seungbong Han, Sangwoo Park, Jeong Yoon Jang, Dae-Hee Kim, Duk-Hyun Kang, Jae-Kwan Song, Jong-Min Song
BACKGROUND: Significant mitral regurgitation (MR) may reduce a pressure gradient of aortic stenosis (AS) by decreasing forward stroke volume. The study objective was to evaluate whether significant MR can cause inconsistency when assessing the severity of AS. METHODS: Among 5,355 patients diagnosed with AS from 2000 to 2015, 68 were retrospectively found to have concomitant significant (moderate or greater) MR and normal left ventricular ejection fractions in normal sinus rhythm (AS with MR)...
November 17, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/29133568/activity-of-ceftolozane-tazobactam-against-carbapenem-resistant-non-carbapenemase-producing-pseudomonas-aeruginosa-and-associated-resistance-mechanisms
#6
Yu Mi Wi, Kerryl E Greenwood-Quaintance, Audrey N Schuetz, Kwan Soo Ko, Kyong Ran Peck, Jae-Hoon Song, Robin Patel
Although carbapenems are effective for treating serious multidrug-resistant Pseudomonas aeruginosa infections, carbapenem-resistant P. aeruginosa (CRPA) is now being reported worldwide. Ceftolozane-tazobactam (C/T) demonstrates activity against many multidrug-resistant isolates. We evaluated the activity of C/T and compared its activity to that of ceftazidime-avibactam (C/A) using a well-characterized collection of non-carbapenemase-producing CRPA isolates. Forty-two non-carbapenemase-producing CRPA isolates from a previous study (J...
January 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29103971/synthesis-and-biological-evaluation-of-thiazole-derivatives-as-gpr119-agonists
#7
Hyojin Kim, Suk Joon Cho, Minjin Yoo, Seung Kyu Kang, Kwang Rok Kim, Hwan Hee Lee, Jin Sook Song, Sang Dal Rhee, Won Hoon Jung, Jin Hee Ahn, Jae-Kyung Jung, Kwan-Young Jung
A series of 4-(phenoxymethyl)thiazole derivatives was synthesized and evaluated for their GPR119 agonistic effect. Several 4-(phenoxymethyl)thiazoles with pyrrolidine-2,5-dione moieties showed potent GPR119 agonistic activities. Among them, compound 27 and 32d showed good in vitro activity with an EC50 value of 49 nM and 18 nM, respectively with improved human and rat liver microsomal stability compare with MBX-2982. Compound 27 &32d did not exhibit significant CYP inhibition, hERG binding, and cytotoxicity...
October 20, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29066082/performance-of-a-simplified-dichotomous-phenotypic-classification-of-bicuspid-aortic-valve-to-predict-type-of-valvulopathy-and-combined-aortopathy
#8
Byung Joo Sun, Sahmin Lee, Jeong Yoon Jang, Osung Kwon, Jae Seok Bae, Ji Hye Lee, Dae-Hee Kim, Sung-Ho Jung, Jong-Min Song, Duk-Hyun Kang, Cheol Hyun Chung, Jae-Kwan Song
BACKGROUND: A simplified classification of bicuspid aortic valve (BAV) morphology using only the orientation of fused cusps was recently proposed. The aim of this study was to test whether it is useful for showing an association with the type of valvulopathy or aortopathy. METHODS: BAV phenotype was retrospectively classified in 681 patients (mean age, 59 ± 12 years; 424 men) who underwent aortic valve surgery. Each BAV was classified using both dichotomous (right and left coronary cusp fusion [CCF] vs mixed cusp fusion [MCF]) and conventional methods, and its association with the dominant valvulopathy (aortic stenosis [AS] vs regurgitation) and concomitant aortic surgery was analyzed...
December 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/29040438/geometric-predictors-of-left-ventricular-outflow-tract-obstruction-in-patients-with-hypertrophic-cardiomyopathy-a-3d-computed-tomography-analysis
#9
Yunsun Song, Dong Hyun Yang, Bríain Ó Hartaigh, Se Jin Cho, Joon-Won Kang, Young-Hak Kim, Joon Bum Kim, Dae-Hee Kim, Jong-Min Song, Duk-Hyun Kang, Jae-Kwan Song, Tae-Hwan Lim
Aims: To establish geometric predictors of left ventricular outflow tract obstruction (LVOTO) in hypertrophic cardiomyopathy (HCM) patients by use of cardiac computed tomography (CT). Methods and results: A total of 141 consecutive patients with HCM who underwent cardiac CT comprised the analytic sample. The degree, pattern, and extent of left ventricular (LV) hypertrophy were evaluated using 3D CT. Abnormality of papillary muscle (PM), mitral valve, and aorto-mitral angle were evaluated quantitatively...
October 11, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/29032666/24-hour-blood-pressure-response-to-lower-dose-30-mg-fimasartan-in-korean-patients-with-mild-to-moderate-essential-hypertension
#10
Hae-Young Lee, Cheol-Ho Kim, Jae-Kwan Song, Shung Chull Chae, Myung Ho Jeong, Dong-Soo Kim, Byung-Hee Oh
BACKGROUND/AIMS: Fimasartan is an angiotensin type 1 receptor blocker (ARB) which has comparable efficacy and tolerability with other ARBs. The aim of this study was to evaluate 24-hour blood pressure (BP) lowering efficacy and the tolerability of the low dose fimasartan compared with valsartan in patients with mild to moderate hypertension. METHODS: This study was a phase II, prospective, multicenter, randomized, double-blind, parallel-grouped trial. A total of 75 hypertensive patients, whose mean ambulatory BP monitoring values were ≥ 135/85 mmHg, were randomized to either fimasartan 30 mg or valsartan 80 mg daily...
November 2017: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/28982717/initial-surgery-versus-conservative-management-of-symptomatic-severe-mitral-regurgitation-in-the-elderly
#11
Duk-Hyun Kang, Ran Heo, Sahmin Lee, Seunghee Baek, Dae-Hee Kim, Jong-Min Song, Jae-Kwan Song, Jae Won Lee
OBJECTIVE: In elderly patients, the benefit of surgical correction of severe mitral regurgitation (MR) may not be greater than the operative risk. This study sought to compare the long-term clinical outcomes between initial surgery and conservative management in elderly patients (≥70 years of age) with severe MR. METHODS: We prospectively evaluated 157 consecutive patients (75 men, 74±4 years of age) with severe degenerative MR and mild symptoms. Mitral valve surgery was performed on 79 (initial surgery group), whereas the conservative strategy was chosen for 78 patients (conservative management group)...
October 5, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28892526/rivaroxaban-vs-warfarin-sodium-in-the-ultra-early-period-after-atrial-fibrillation-related-mild-ischemic-stroke-a-randomized-clinical-trial
#12
RANDOMIZED CONTROLLED TRIAL
Keun-Sik Hong, Sun U Kwon, Sang Hun Lee, Ji Sung Lee, Yong-Jae Kim, Tae-Jin Song, Young Dae Kim, Man-Seok Park, Eung-Gyu Kim, Jae-Kwan Cha, Sang Min Sung, Byung-Woo Yoon, Oh Young Bang, Woo-Keun Seo, Yang-Ha Hwang, Seong Hwan Ahn, Dong-Wha Kang, Hyun Goo Kang, Kyung-Ho Yu
Importance: In atrial fibrillation (AF)-related acute ischemic stroke, the optimal oral anticoagulation strategy remains unclear. Objective: To test whether rivaroxaban or warfarin sodium is safer and more effective for preventing early recurrent stroke in patients with AF-related acute ischemic stroke. Design, Setting, and Participants: A randomized, multicenter, open-label, blinded end point evaluation, comparative phase 2 trial was conducted from April 28, 2014, to December 7, 2015, at 14 academic medical centers in South Korea among patients with mild AF-related stroke within the previous 5 days who were deemed suitable for early anticoagulation...
October 1, 2017: JAMA Neurology
https://www.readbyqxmd.com/read/28861286/comparison-of-periodontitis-associated-oral-biofilm-formation-under-dynamic-and-static-conditions
#13
Won Sub Song, Jae-Kwan Lee, Se Hwan Park, Heung-Sik Um, Si Young Lee, Beom-Seok Chang
PURPOSE: The purpose of this study was to compare the characteristics of single- and dual-species in vitro oral biofilms made by static and dynamic methods. METHODS: Hydroxyapatite (HA) disks, 12.7 mm in diameter and 3 mm thick, were coated with processed saliva for 4 hours. The disks were divided into a static method group and a dynamic method group. The disks treated with a static method were cultured in 12-well plates, and the disks in the dynamic method group were cultured in a Center for Disease Control and Prevention (CDC) biofilm reactor for 72 hours...
August 2017: Journal of Periodontal & Implant Science
https://www.readbyqxmd.com/read/28854890/chemoradiotherapy-versus-surgery-followed-by-postoperative-radiotherapy-in-tonsil-cancer-korean-radiation-oncology-group-krog-study
#14
Sanghyuk Song, Hong-Gyun Wu, Chang Geol Lee, Ki Chang Keum, Mi Sun Kim, Yong Chan Ahn, Dongryul Oh, Hyo Jung Park, Sang-Wook Lee, Geumju Park, Sung Ho Moon, Kwan Ho Cho, Yeon-Sil Kim, Yongkyun Won, Young-Taek Oh, Won-Taek Kim, Jae-Uk Jeong
BACKGROUND: Treatment of tonsil cancer, a subset of oropahryngeal cancer, varies between surgery and radiotherapy. Well-designed studies in tonsil cancer have been rare and it is still controversial which treatment is optimal. This study aimed to assess the outcome and failure patterns in tonsil cancer patients treated with either approaches. METHODS: We retrospectively reviewed medical records of 586 patients with tonsil cancer, treated between 1998 and 2010 at 16 hospitals in Korea...
August 30, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28783925/education-and-training-guidelines-for-the-board-of-the-korean-society-of-gastrointestinal-endoscopy
#15
REVIEW
Hee Seok Moon, Eun Kwang Choi, Ji Hyun Seo, Jeong Seop Moon, Ho June Song, Kyoung Oh Kim, Jong Jin Hyun, Sung Kwan Shin, Beom Jae Lee, Sang Heon Lee
The Korean Society of Gastrointestinal Endoscopy (KSGE) developed a gastrointestinal (GI) endoscopy board in 1995 and related regulations. Although the KSGE has acquired many specialists since then, the education and training aims and guidelines were insufficient. During GI fellowship training, obtaining sufficient exposure to some types of endoscopic procedures is difficult. Fellows should acquire endoscopic skills through supervised endoscopic procedures during GI fellowship training. Thus, the KSGE requires training guidelines for fellowships that allow fellows to perform independent endoscopic procedures without supervision...
July 2017: Clinical Endoscopy
https://www.readbyqxmd.com/read/28752695/changes-in-tear-volume-after-3-diquafosol-treatment-in-patients-with-dry-eye-syndrome-an-anterior-segment-spectral-domain-optical-coherence-tomography-study
#16
RANDOMIZED CONTROLLED TRIAL
Kwan Bok Lee, Kyung Min Koh, Young A Kwon, Sang Wroul Song, Byoung Yeop Kim, Jae Lim Chung
PURPOSE: To evaluate changes in the tear meniscus area and tear meniscus height over time in patients with dry eye syndrome, using anterior segment spectral-domain optical coherence tomography after the instillation of 3% diquafosol ophthalmic solution. METHODS: Sixty eyes from 30 patients with mild to moderate dry eye syndrome were included. Tear meniscus images acquired by anterior segment spectral-domain optical coherence tomography were analyzed using National Institutes of Health's image-analysis software (ImageJ 1...
August 2017: Korean Journal of Ophthalmology: KJO
https://www.readbyqxmd.com/read/28687358/a-lactococcus-lactis-bfe920-feed-vaccine-expressing-a-fusion-protein-composed-of-the-ompa-and-flgd-antigens-from-edwardsiella-tarda-was-significantly-better-at-protecting-olive-flounder-paralichthys-olivaceus-from-edwardsiellosis-than-single-antigen-vaccines
#17
Bo Ram Beck, Soon Ho Lee, Daniel Kim, Ji Hye Park, Hyun Kyung Lee, San-Sung Kwon, Kwan Hee Lee, Jae Il Lee, Seong Kyu Song
Edwardsiellosis is a major fish disease that causes a significant economic damage in the aquaculture industry. Here, we assessed vaccine efficacy after feeding oral vaccines to olive flounder (Paralichthys olivaceus), either L. lactis BFE920 expressing Edwardsiella tarda outer membrane protein A (OmpA), flagellar hook protein D (FlgD), or a fusion antigen of the two. Feed vaccination was done twice with a one-week interval. Fish were fed regular feed adsorbed with the vaccines. Feed vaccination was given over the course of one week to maximize the interaction between the feed vaccines and the fish intestine...
July 4, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28665466/long-term-clinical-outcomes-of-the-single-incision-technique-for-implantation-of-implantable-venous-access-ports-via-the-axillary-vein
#18
Tae-Seok Seo, Myung Gyu Song, Jun Suk Kim, Chul Won Choi, Jae Hong Seo, Sang Cheul Oh, Eun Joo Kang, Jae-Kwan Lee, Sung-Yong Lee
PURPOSE: To evaluate long-term clinical outcomes and complications of the single-incision technique for implantation of totally implantable venous access ports (TIVAPs) via the axillary vein. MATERIALS AND METHODS: A total of 932 TIVAPs were placed in 927 patients between May 2012 and October 2014 using a single-incision technique. Patients included 620 men and 307 women with a mean age of 60.0 years. TIVAPs were placed via the left (n = 475) and right (n = 457) axillary veins after making a single oblique vertical incision and medial side pocket without subcutaneous tunneling...
July 14, 2017: Journal of Vascular Access
https://www.readbyqxmd.com/read/28633478/efficacy-of-3d-transoesophageal-echocardiography-for-transcatheter-device-closure-of-atrial-septal-defect-without-balloon-sizing
#19
Jeong Yoon Jang, Ran Heo, Min Soo Cho, Jaeseok Bae, Jung Ae Hong, Sahmin Lee, Jung-Min Ahn, Duk-Woo Park, Dae-Hee Kim, Duk-Hyun Kang, Jae-Kwan Song, Jong-Min Song
Aims: Using balloon sizing to determine device size may cause complications and increase procedure time in performing transcatheter closure of atrial septal defect (ASD). We aimed to validate the clinical utility of a formula using measurements from 3D transoesophageal echocardiography (TOE) images in performing the procedure without balloon sizing. Methods and results: We enrolled 248 consecutive patients with ASD in a prospective registry. In the first tier (n = 53), we determined the device size before the procedure using our formula and performed balloon sizing during the procedure to verify our decision...
June 19, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28623496/association-between-flow-skewness-and-aortic-dilatation-in-patients-with-aortic-stenosis
#20
Hojin Ha, Hyun Jung Koo, June Goo Lee, Guk Bae Kim, Jihoon Kweon, Sang Joon Lee, Joon Won Kang, Tae Hwan Lim, Dae Hee Kim, Jong Min Song, Duk Hyun Kang, Jae Kwan Song, Young Hak Kim, Namkug Kim, Dong Hyun Yang
We investigated association between hemodynamic characteristics and aortic dilatation in patients with severe aortic stenosis (AS). Eighty patients with severe AS (mean age, 67.2 ± 12.5 years) who underwent multi-detector computed tomography and phase-contrast magnetic resonance imaging at the ascending aorta were retrospectively analyzed. Patients with an ascending aorta diameter >4 cm had a significantly higher forward flow rate at systole (28.5 ± 6.0 vs. 36.2 ± 8.6 L min, P < 0...
June 16, 2017: International Journal of Cardiovascular Imaging
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