Kwang Jae Lee

Seonam University, Onyang, Chungcheongnam-do, South Korea

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Publications (149)499.21 Total impact

  • Kwang Jae Lee
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    ABSTRACT: The prevalence of gastroesophageal reflux disease (GERD) in South Korea has increased over the past 10 years. Patients with erosive reflux disease (ERD) shows better response to proton pump inhibitors (PPIs) than those with non-erosive reflux disease (NERD). NERD is a heterogeneous condition, showing pathological gastroesophageal reflux or esophageal hypersensitivity to reflux contents. NERD patients with pathological gastroesophageal reflux or hypersensitivity to acid may respond to PPIs. However, many patients with esophageal hypersensitivity to nonacid or functional heartburn do not respond to PPIs. Therefore, careful history and investigations are required when managing patients with refractory GERD who show poor response to conventional dose PPIs. Combined pH-impedance studies and a PPI diagnostic trial are recommended to reveal underlying mechanisms of refractory symptoms. For those with ongoing reflux-related symptoms, split dose administration, change to long-acting PPIs or PPIs less influenced by CYP2C19 genotypes, increasing dose of PPIs, and the addition of alginate preparations, prokinetics, selective serotonin reuptake inhibitors, or tricyclic antidepressants can be considered. Pain modulators, selective serotonin reuptake inhibitors, or tricyclic antidepressants are more likely to be effective for those with reflux-unrelated symptoms. Surgery or endoscopic per oral fundoplication may be effective in selected patients.
    The Korean journal of gastroenterology = Taehan Sohwagi Hakhoe chi 08/2015; 66(2):70-4. DOI:10.4166/kjg.2015.66.2.70
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    ABSTRACT: Therapies of functional dyspepsia (FD) are limited. DA-9701 is a novel prokinetic agent formulated with Pharbitis semen and Corydalis Tuber. We aimed to assess the efficacy of DA-9701 compared with itopride in FD patients. Patients with FD randomly received either itopride 50 mg or DA-9701 30 mg t.i.d after a 2-week baseline period. After 4 weeks of treatment, 2 primary efficacy endpoints were analyzed: the change from baseline in composite score of the 8 dyspep-tic symptoms and the overall treatment effect. Impact on patients' quality of life was assessed using the Nepean Dyspepsia Index (NDI) questionnaire. We randomly assigned 464 patients with 455 having outcome data. The difference of the composite score change of the 8 symptoms between the 2 groups was 0.62, indicating that DA-9701 was not inferior to itopride. The overall treatment effect response rate was not different between the groups. When responder was defined as ≥ 5 of the 7 Likert scale, responder rates were 37% of DA-9701 and 36% of itopride group. Patients receiving DA-9701 experienced similar mean percentage of days with adequate relief during the 4-week treatment period compared with those receiving itopride (56.8% vs 59.1%). Both drugs increased the NDI score of 5 domains without any difference in change of the NDI score between the groups. The safety profile of both drugs was comparable. DA-9701 significantly improves symptoms in patients with FD. DA-9701 showed non-inferior efficacy to itopride with com-parable safety.
    Journal of neurogastroenterology and motility 07/2015; 21(3):414-22. DOI:10.5056/jnm14117 · 2.70 Impact Factor
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    ABSTRACT: Covered self-expandable metal stents (SEMSs) are increasingly used as alternatives to uncovered SEMSs for the palliation of inoperable malignant distal biliary obstruction to counteract tumor ingrowth. We aimed to compare the outcomes of partially covered and uncovered SEMSs with identical mesh structures and anti-migration properties, such as low axial force and flared ends. One hundred and three patients who were diagnosed with inoperable malignant distal biliary obstruction between January 2006 and August 2013 were randomly assigned to either the partially covered (n = 51) or uncovered (n = 52) SEMS group. There were no significant differences in the cumulative stent patency, overall patient survival, stent dysfunction-free survival and overall adverse events, including pancreatitis and cholecystitis, between the two groups. Compared to the uncovered group, stent migration (5.9% vs. 0%, p = 0.118) and tumor overgrowth (7.8% vs. 1.9%, p = 0.205) were non-significantly more frequent in the partially covered group, whereas tumor ingrowth showed a significantly higher incidence in the uncovered group (5.9% vs. 19.2%, p = 0.041). Stent migration in the partially covered group occurred only in patients with short stenosis of the utmost distal bile duct (two in ampullary cancer, one in bile duct cancer), and did not occur in any patients with pancreatic cancer. For the palliation of malignant distal biliary obstruction, endoscopic placement of partially covered SEMSs with anti-migration designs and identical mesh structures to uncovered SEMSs failed to prolong cumulative stent patency or reduce stent migration.
    Scandinavian Journal of Gastroenterology 07/2015; DOI:10.3109/00365521.2015.1057219 · 2.33 Impact Factor
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    ABSTRACT: To evaluate the effects of epidural electrical stimulation (EES) and repetitive transcranial magnetic stimulation (rTMS) on motor recovery and brain activity in a rat model of diffuse traumatic brain injury (TBI) compared to the control group. Thirty rats weighing 270-285 g with diffuse TBI with 45 kg/cm(2) using a weight-drop model were assigned to one of three groups: the EES group (ES) (anodal electrical stimulation at 50 Hz), the rTMS group (MS) (magnetic stimulation at 10 Hz, 3-second stimulation with 6-second intervals, 4,000 total stimulations per day), and the sham-treated control group (sham) (no stimulation). They were pre-trained to perform a single-pellet reaching task (SPRT) and a rotarod test (RRT) for 14 days. Diffuse TBI was then induced and an electrode was implanted over the dominant motor cortex. The changes in SPRT success rate, RRT performance time rate and the expression of c-Fos after two weeks of EES or rTMS were tracked. SPRT improved significantly from day 8 to day 12 in the ES group and from day 4 to day 14 in the MS group (p<0.05) compared to the sham group. RRT improved significantly from day 6 to day 11 in ES and from day 4 to day 9 in MS compared to the sham group. The ES and MS groups showed increased expression of c-Fos in the cerebral cortex compared to the sham group. ES or MS in a rat model of diffuse TBI can be used to enhance motor recovery and brain activity.
    Annals of Rehabilitation Medicine 06/2015; 39(3):416-24. DOI:10.5535/arm.2015.39.3.416
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    Suhyun Bae · Kwang Jae Lee · Young-Sang Kim · Kyu-Nam Kim
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    ABSTRACT: Small intestinal bacterial overgrowth (SIBO) can partly explain irritable bowel syndrome (IBS), and rifaximin has been observed to improve abdominal symptoms in nonconstipated IBS patients. However, there are few reports on the association of the rifaximin treatment periods with the results of a lactulose breath test (LBT). Therefore, we performed a retrospective review of patient charts to investigate the relation between the rifaximin treatment periods with LBT results in nonconstipated IBS patients. We also evaluated the time to achieve a symptomatic improvement in the IBS patients as compared to the changes in the LBT. We reviewed the charts for patients who showed IBS symptoms with documented positive results for LBT during their initial visit and who had a follow-up LBT after treatment with rifaximin. The LBT values were compared to the subjects' symptom scores. A total of 102 subjects had a follow-up LBT to assess LBT normalization. The subjects were divided into groups according to treatment periods of 4 weeks (n = 36), 8 weeks (n = 43), and 12 weeks (n = 23). The groups with a longer treatment exhibited an increase in the hydrogen gas value at 90 min and its sum during 90 min at the initial LBT. There were significant differences in hydrogen gas value at 90 min and in its sum during 90 min at the initial LBT between the groups treated for 4 and 12 weeks. The most significant treatment response was observed during the first 4 weeks for all treatment groups. Symptomatic improvement occurred earlier than LBT normalization in the treatment period over 4 weeks. The results indicate that different rifaximin treatment periods are needed in accordance with LBT levels to effectively eradicate SIBO. Graphical Abstract
    Journal of Korean Medical Science 05/2015; 30(6):757-762. DOI:10.3346/jkms.2015.30.6.757 · 1.25 Impact Factor
  • Gastroenterology 04/2015; 148(4):S-891. DOI:10.1016/S0016-5085(15)33025-0 · 13.93 Impact Factor
  • Kwang Jae Lee · Sun Young Park
    Gastroenterology 04/2015; 148(4):S-892. DOI:10.1016/S0016-5085(15)33028-6 · 13.93 Impact Factor
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    ABSTRACT: Background and study aims: Endoscopists sometimes face paradoxical cases in which the endoscopic submucosal dissection (ESD) specimen reveals a non-neoplastic pathology result. The aims of the study were to determine the reasons for such results, and to compare the endoscopic characteristics of non-neoplastic and conventional neoplastic pathology groups after ESD. Patients and methods: A total of 1186 gastric ESDs performed between February 2005 and December 2011 were retrospectively reviewed. The ESD specimens included 52 (4.4 %) that were confirmed as negative or indefinite for neoplasia. Patient characteristics and endoscopic and pathological data were reviewed and compared. Results: Non-neoplastic pathology after ESD was due to complete removal of the lesion at biopsy in 45 cases (86.5 %), pathology overestimation in 5 (9.6 %), and incorrect localization of the original tumor with subsequent ESD performed at the wrong site in 2 (3.8 %). The mean length and surface area of the non-neoplastic lesions were 9.2 ± 2.6 mm and 49.6 ± 23.6 mm (2), respectively. Mean sampling ratios were 3.0 ± 1.5 mm/fragment and 16.3 ± 10.0 mm(2)/fragment. Compared with 1134 cases confirmed as neoplastic on the final ESD specimen, non-neoplastic cases showed a significantly smaller tumor size and surface area, and lower sampling ratios in a logistic regression analysis adjusted for potential confounders (P < 0.001 for all). Conclusions: Complete lesion removal by biopsy, pathology overestimation, and incorrect localization of the original tumor with subsequent ESD at the wrong site were the main reasons for non-neoplastic results after ESD. Small tumor size and surface area, and low sampling ratios were associated with non-neoplastic pathology results after ESD. © Georg Thieme Verlag KG Stuttgart · New York.
    Endoscopy 02/2015; 47(07). DOI:10.1055/s-0034-1391375 · 5.20 Impact Factor
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    ABSTRACT: We investigated the spatial distribution of light emission from InGaN/GaN light-emitting diodes (LEDs) fabricated on lens-shaped patterns (LSPs) by using confocal scanning electroluminescence microscopy (CSM). From three-dimensional CSM images measured by varying the position of the focal plane of a detector, the luminescence profiles from the InGaN/GaN LEDs were significantly changed with respect to the position of the LSP itself. In addition, it the EL intensity around the boundary region of the single LSP was found to fluctuate periodically with the distance of 671 nm between the adjacent bright patterns. From the simple theoretical analysis, the periodic fluctuation around the boundary of every single pattern in the CSM images is attributed to interference effects due to periodically-positioned LSPs.
    Journal- Korean Physical Society 01/2015; 66(2):266-269. DOI:10.3938/jkps.66.266 · 0.43 Impact Factor
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    ABSTRACT: We evaluated the long-term outcome and clinical course of patients of nonsteroidal anti-inflammatory drug (NSAID)-induced small intestinal injury by performing capsule endoscopy (CE). A multicenter retrospective study was conducted using data collected from the CE nationwide database registry, which has been established since 2002. A total of 140 patients (87 males; mean age, 60.6±14.8 years) from the CE nationwide database registry (n=2,885) were diagnosed with NSAID-induced small intestinal injury and enrolled in our study. Fortynine patients (35.0%) presented with a history of aspirin use and an additional 49 (35.0%) were taking NSAIDs without aspirin. The most prominent findings after performing CE were multiple ulcerations (n=82, 58.6%) and erosions or aphthae (n=32, 22.9%). During the follow-up period (mean, 15.9±19.0 months; range, 0 to 106 months), NSAID-induced small intestinal injury only recurred in six patients (4.3%). Older age and hypertension were positive predictive factors for recurrence. These results suggest that the recurrence of NSAID-induced small bowel injury was not frequent in the presence of conservative treatment. Therefore, the initial diagnosis using CE and the medication history are important. (Gut Liver, Published online December 5, 2014).
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    ABSTRACT: We report on the vertically stacked color tunable light-emitting diodes (LEDs) fabricated using wafer bonding with an indium tin oxide (ITO) layer and transfer printing by the laser lift-off process. Employing optically transparent and electrically conductive ITO as an adhesion layer enables to bond the GaN-based blue and AlGaInP-based yellow LEDs. We find out that the inter-diffusion of In, O, and Ga at the interface between ITO and GaP allows the strong bonding of the heterogeneous optoelectronic materials and the integration of two different color LEDs on a single substrate. The efficacy of this method is demonstrated by showing the successful control of color coordinate from the vertically stacked LEDs by modulating the individual intensity of blue and yellow emissions.
    ACS Applied Materials & Interfaces 11/2014; 6(22). DOI:10.1021/am505415q · 6.72 Impact Factor
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    Yong-Soon Yoon · Jong Yun Kim · Kwang Jae Lee · Ki Pi Yu · Mi Sook Lee
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    ABSTRACT: In the present report, we describe a case of long-term follow-up esophageal stricture occurring in a patient with nasogastric tube use. A 63-year-old man who had experienced dislocation of the 6th and 7th cervical vertebrae as the result of an external injury received treatment at another hospital and was admitted to the rehabilitation department of our hospital. After he exhibited normal swallowing in a videofluoroscopic swallowing test, the nasogastric tube was removed and oral feeding with a dysphagia diet was initiated. However, during oral feeding, the patient complained of swallowing difficulties in his lower throat. An esophagogastroduodenoscopy was performed to examine the lesions below the pharynx and a 2-mm stricture was observed. A balloon dilatation was performed for a total of 9 times to extend the stricture. After the procedure, the patient was able to easily swallow a normal diet through the esophagus and the vomiting symptoms disappeared. An esophagography showed that the diameter of the esophageal stricture was 11 mm.
    Annals of Rehabilitation Medicine 08/2014; 38(4):581-4. DOI:10.5535/arm.2014.38.4.581
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    ABSTRACT: Background/Aims Helicobacter pylori eradication therapy has been used as a first-line treatment for H. pylori-positive gastric mucosa-associated lymphoid tissue (MALT) lymphoma. However, the management strategy for H. pylori-negative MALT lymphoma remains controversial. Therefore, the aim of this study was to examine the success rate of each treatment option for H. pylori-positive and H. pylori-negative gastric MALT lymphomas. Methods In total, 57 patients with gastric MALT lymphoma diagnosed between December 2000 and June 2012 were enrolled in the study. The treatment responses were compared between H. pylori-positive and H. pylori-negative gastric MALT lymphomas. Results Of the 57 patients, 43 (75%) had H. pylori infection. Forty-eight patients received H. pylori eradication as a first-line treatment, and complete remission was achieved in 31 of the 39 patients (80%) with H. pylori-positive MALT lymphoma and in five (56%) of the nine patients with H. pylori-negative MALT lymphoma; no significant difference was observed between the groups (p=0.135). The other treatment modalities, including radiation therapy, chemotherapy, and surgery, were effective irrespective of H. pylori infection status, with no significant difference in the treatment response between H. pylori-positive and H. pylori-negative MALT lymphomas. Conclusions H. pylori eradication therapy may be considered as a first-line treatment regardless of H. pylori infection status.
    Gut and liver 07/2014; 8(4):408-14. DOI:10.5009/gnl.2014.8.4.408 · 1.49 Impact Factor
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    ABSTRACT: We demonstrate the high efficiency of InGaN/GaN multiple quantum wells (MQWs) light-emitting diode (LED) grown on the electrochemically etched nanoporous (NP) GaN. The photoluminescence (PL) and Raman spectra show that the LEDs with NP GaN have a strong carrier localization effect resulting from the relaxed strain and reduced defect density in MQWs. Also, the finite-difference time-domain (FDTD) simulation shows that the light extraction efficiency (LEE) is increased by light scattering effect by nanopores. The output power of LED with NP GaN is increased up to 123.1% at 20 mA, compared to that of LED without NP GaN. The outstanding performance of LEDs with NP GaN is attributed to the increased internal quantum efficiency (IQE) by the carrier localization in the indium-rich clusters, low defect density in MQWs, and increased LEE owing to the light scattering in NP GaN.
    Optics Express 06/2014; 22(S4):A1164-A1173. DOI:10.1364/OE.22.0A1164 · 3.49 Impact Factor
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    ABSTRACT: BACKGROUND: Data regarding the prescription status of individuals with diabetes are limited. This study was an analysis of participants from the relationship between cardiovascular disease and brachial-ankle pulse wave velocity in patients with type 2 diabetes (REBOUND) Study, which was a prospective multicenter cohort study recruited from eight general hospitals in Busan, Korea. We performed this study to investigate the current status of prescription in Korean type 2 diabetic patients. METHODS: Type 2 diabetic patients aged 30 years or more were recruited and data were collected for demographics, medical history, medications, blood pressure, and laboratory tests. RESULTS: Three thousands and fifty-eight type 2 diabetic patients were recruited. Mean age, duration of diabetes, and HbA1c were 59 years, 7.6 years, and 7.2%, respectively. Prevalence of hypertension was 66%. Overall, 7.3% of patients were treated with diet and exercise only, 68.2% with oral hypoglycemic agents (OHAs) only, 5.3% with insulin only, and 19.2% with both insulin and OHA. The percentage of patients using antihypertensive, antidyslipidemic, antiplatelet agents was similar as about 60%. The prevalence of statins and aspirin users was 52% and 32%, respectively. CONCLUSION: In our study, two thirds of type 2 diabetic patients were treated with OHA only, and one fifth with insulin plus OHA, and 5% with insulin only. More than half of the patients were using each of antihypertensive, antidyslipidemic, or antiplatelet agents. About a half of the patients were treated with statins and one third were treated with aspirin.
    Diabetes & metabolism journal 06/2014; 38(3):230-239. DOI:10.4093/dmj.2014.38.3.230
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    ABSTRACT: Purpose Preoperative localization is the most important preparation for laparoscopic surgery. Preoperative marking with India ink has widely been used and is considered to be safe and effective. However, India ink can cause significant inflammation, adhesions and bowel obstruction. Therefore, we have used the patient's blood instead of the ink since 2011. In this retrospective study, we wanted to examine the feasibility of preoperative localization by using the patient's blood. Methods Twenty-five patients who underwent preoperative localization in which 10 mL of their own venous blood was used as a tattooing agent were included in this study. The characteristics of the patients, the anatomy of the colon cancer, and the efficacy and the side effects of using this procedure were analyzed. Results In 23 cases (92%), through the laparoscope, we found perfectly localized bloody smudges in the serosa. However, in 2 cases (8%), we could not find the exact location of the lesion. No patients showed any complications. Conclusion Preoperative localization of early colon cancer or a malignant polyp by using patient's blood is feasible, safe and simple. We think that using the patient's blood for localization of a lesion is better than using some other foreign material such as India ink.
    Annals of Coloproctology 06/2014; 30(3):115-7. DOI:10.3393/ac.2014.30.3.115
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    ABSTRACT: Colonic pseudo-obstruction (CPO) is defined as marked colonic distension in the absence of mechanical obstruction. We aimed to investigate the clinical characteristics of CPO and the factors associated with the response to medical treatment by using a multicenter database in Korea. CPO was diagnosed as colonic dilatation without mechanical obstruction by using radiologic and/or endoscopic examinations. Acute CPO occurring in the postoperative period in surgical patients or as a response to an acute illness was excluded. CPO cases were identified in 15 tertiary referral hospitals between 2000 and 2011. The patients' data were retrospectively reviewed and analyzed. In total, 104 patients (53 men; mean age at diagnosis, 47 yr) were identified. Seventy-seven of 104 patients (74%) showed a transition zone on abdominal computed tomography. Sixty of 104 patients (58%) showed poor responses to medical treatment and underwent surgery at the mean follow-up of 7.4 months (0.5-61 months). Younger age at the time of diagnosis, abdominal distension as a chief complaint, and greater cecal diameter were independently associated with the poor responses to medical treatment. These may be risk factors for a poor response to medical treatment. Graphical Abstract
    Journal of Korean Medical Science 05/2014; 29(5):699-703. DOI:10.3346/jkms.2014.29.5.699 · 1.25 Impact Factor
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    Eunkyung Kim · Hongsub Lee · Hye-Kyung Jung · Kwang Jae Lee
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    ABSTRACT: Owing to the rarity of the disease, epidemiologic information on achalasia is limited. This study aimed to investigate the epidemiology and treatment patterns of achalasia in the population of Korea using a national healthcare database. The diagnostic code K22.0 of the International Classification of Diseases was used to identify cases of achalasia between 2007 and 2011. Treatment modalities for achalasia were identified using the electronic data interchange codes Q7642 or Q7641 for balloon dilation and QA421 or QA422 for esophago-cardiomyotomy. A total of 3,105 patients with achalasia (1,447 men; mean age, 52.5 yr) were identified between 2007 and 2011, indicating a prevalence of 6.29/100,000 (95% confidence interval [CI], 4.94-7.66) during this 5-yr period. A total of 191 incident cases of achalasia (82 men; mean age, 49.5 yr), which were not diagnosed as achalasia in the previous 4 yr, were detected in 2011, indicating an incidence of 0.39/100,000 (95% CI, 0.15-0.63) for that year. During the study period, balloon dilation therapy was performed a total of 975 times in 719 patients, and surgical esophago-cardiomyotomy was performed once per patient in 17 patients. This is the first population-based epidemiologic study of achalasia in Korea. Graphical Abstract
    Journal of Korean medical science 04/2014; 29(4):576-80. DOI:10.3346/jkms.2014.29.4.576 · 1.25 Impact Factor
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    ABSTRACT: Antispasmodics such as octylonium are widely used to manage irritable bowel syndrome (IBS) symptoms. However, the efficacy and safety of another antispasmodic, tiropramide, remain uncertain. We aimed to evaluate the efficacy and safety of tiropramide compared with octylonium in patients with IBS. In this multicenter, randomized, non-inferiority trial, 287 patients with IBS (143 receiving tiropramide and 144 octylonium) were randomly allocated to either tiropramide 100 mg or octylonium 20 mg t.i.d (means 3 times a day) for 4 weeks. Primary endpoint was the mean change of abdominal pain from baseline assessed by visual analogue scales (VAS) score after 4 weeks of treatment. Secondary endpoints were the changes in abdominal pain from baseline at week 2 and in abdominal discomfort at weeks 2 and 4, using VAS scores, patient-reported symptom improvement including stool frequency and consistency, using symptom diaries, IBS-quality of life (IBS-QoL), and depression and anxiety, at week 4. The VAS scores of abdominal pain at week 4, were significantly decreased in both tiropramide and octylonium groups, but the change from baseline did not differ between the 2 groups (difference,-0.26 mm; 95% CI,-4.33-3.82; P = 0.901). Abdominal pain and discomfort assessed using VAS scores, diaries, and IBS-QoL were also improved by both treatments, and the changes from baseline did not differ. The incidence of adverse events was similar in the 2 groups, and no severe adverse events involving either drug were observed. Tiropramide is as effective as octylonium in managing abdominal pain in IBS, with a similar safety profile.
    Journal of neurogastroenterology and motility 01/2014; 20(1):113-21. DOI:10.5056/jnm.2014.20.1.113 · 2.70 Impact Factor
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    ABSTRACT: Background and study aims: The clinical impact of video capsule endoscopy (VCE) in patients with obscure gastrointestinal bleeding (OGIB) remains undetermined. The aim of this study was to evaluate the long-term clinical impact of VCE in patients with OGIB using a nationwide registry. Patients and methods: Data from 305 patients who underwent VCE for OGIB from 13 hospitals in Korea between January 2006 and March 2009 were analyzed. Prospectively collected VCE registry data were reviewed, and follow-up data were collected by chart review and telephone interviews with patients. Multivariate regression analyses using hazard ratios (HR) were performed to determine risk factors for rebleeding. Results: Significant findings were detected in 157 patients (51.5 %). After VCE, interventional treatment was performed in 36 patients (11.8 %). The overall rebleeding rate was 19.0 % during a mean (± SD) follow-up of 38.7 ± 26.4 months. Rebleeding rate did not differ by positive VCE results or application of interventional treatment. Multivariate analysis revealed that angiodysplasia (HR 1.82; 95 % confidence interval [CI] 1.04 - 3.20; P = 0.037) and duration of OGIB > 3 months (HR 1.64; 95 %CI 1.10 - 2.46; P = 0.016) were independent prognostic factors associated with rebleeding. In a subgroup analysis of patients taking anticoagulants, patients who discontinued drugs after VCE showed a lower rebleeding rate than those who did not discontinue this therapy (P = 0.019). Conclusions: VCE did not have a significant impact on the long-term outcome of patients with OGIB. Patients with angiodysplasia on VCE or OGIB > 3 months need to be closely followed even after interventional treatment. In patients who are taking anticoagulants, discontinuation of drugs is necessary in order to lower the risk of rebleeding.
    Endoscopy 11/2013; 46(1). DOI:10.1055/s-0033-1358803 · 5.20 Impact Factor

Publication Stats

907 Citations
499.21 Total Impact Points


  • 2015
    • Seonam University
      Onyang, Chungcheongnam-do, South Korea
  • 2000–2015
    • Ajou University
      • • Department of Gastroenterology
      • • Genomic Research Center for Gastroenterology
      Sŏul, Seoul, South Korea
  • 2014
    • Busan Veterans Hospital
      Tsau-liang-hai, Busan, South Korea
    • Gwangju Institute of Science and Technology
      • School of Materials Science and Engineering
      Gwangju, Gwangju, South Korea
  • 2013–2014
    • Pusan National University
      • Department of Internal Medicine
      Tsau-liang-hai, Busan, South Korea
  • 2012
    • Hospital del Niño Jesus
      Tucumán, Tucumán, Argentina
    • Chung-Ang University Hospital
      Sŏul, Seoul, South Korea
  • 2005–2012
    • Ajou University Medical Center
      수원시, Gyeonggi-do, South Korea
  • 2009–2011
    • Chonbuk National University
      • Division of Advanced Materials Engineering
      Tsiuentcheou, North Jeolla, South Korea
  • 2010
    • Good Samsun Hospital
      Busan, Busan, South Korea
  • 2007
    • University of Leuven
      Louvain, Flemish, Belgium