1.Neutrophil-to-Lymphocyte Ratio at Emergency Room Predicts Mechanical Complications of ST-segment Elevation Myocardial Infarction
Gwang-Seok YOON ; Seong Huan CHOI ; Seong-Ill WOO ; Yong-Soo BAEK ; Sang-Don PARK ; Sung-Hee SHIN ; Dae-Hyeok KIM ; Jun KWAN ; Man-Jong LEE ; Sung Woo KWON
Journal of Korean Medical Science 2021;36(19):e131-
		                        		
		                        			Background:
		                        			The neutrophil-to-lymphocyte ratio (NLR) has been proven to be a reliable inflammatory marker. A recent study reported that elevated NLR is associated with adverse cardiovascular events in patients with ST-segment elevation myocardial infarction (STEMI). We investigated whether NLR at emergency room (ER) is associated with mechanical complications of STEMI undergoing primary percutaneous coronary intervention (PCI). 
		                        		
		                        			Methods:
		                        			A total of 744 patients with STEMI who underwent successful primary PCI from 2009 to 2018 were enrolled in this study. Total and differential leukocyte counts were measured at ER. The NLR was calculated as the ratio of neutrophil count to lymphocyte count. Patients were divided into tertiles according to NLR. Mechanical complications of STEMI were defined by STEMI combined with sudden cardiac arrest, stent thrombosis, pericardial effusion, post myocardial infarction (MI) pericarditis, and post MI ventricular septal rupture, free-wall rupture, left ventricular thrombus, and acute mitral regurgitation during hospitalization. 
		                        		
		                        			Results:
		                        			Patients in the high NLR group (> 4.90) had higher risk of mechanical complications of STEMI (P = 0.001) compared with those in the low and intermediate groups (13% vs. 13% vs. 23%). On multivariable analysis, NLR remained an independent predictor for mechanical complications of STEMI (RR = 1.947, 95% CI = 1.136–3.339, P= 0.015) along with symptom-to balloon time (P = 0.002) and left ventricular dysfunction (P < 0.001). 
		                        		
		                        			Conclusion
		                        			NLR at ER is an independent predictor of mechanical complications of STEMI undergoing primary PCI. STEMI patients with high NLR are at increased risk for complications during hospitalization, therefore, needs more intensive treatment after PCI.
		                        		
		                        		
		                        		
		                        	
2.Neutrophil-to-Lymphocyte Ratio at Emergency Room Predicts Mechanical Complications of ST-segment Elevation Myocardial Infarction
Gwang-Seok YOON ; Seong Huan CHOI ; Seong-Ill WOO ; Yong-Soo BAEK ; Sang-Don PARK ; Sung-Hee SHIN ; Dae-Hyeok KIM ; Jun KWAN ; Man-Jong LEE ; Sung Woo KWON
Journal of Korean Medical Science 2021;36(19):e131-
		                        		
		                        			Background:
		                        			The neutrophil-to-lymphocyte ratio (NLR) has been proven to be a reliable inflammatory marker. A recent study reported that elevated NLR is associated with adverse cardiovascular events in patients with ST-segment elevation myocardial infarction (STEMI). We investigated whether NLR at emergency room (ER) is associated with mechanical complications of STEMI undergoing primary percutaneous coronary intervention (PCI). 
		                        		
		                        			Methods:
		                        			A total of 744 patients with STEMI who underwent successful primary PCI from 2009 to 2018 were enrolled in this study. Total and differential leukocyte counts were measured at ER. The NLR was calculated as the ratio of neutrophil count to lymphocyte count. Patients were divided into tertiles according to NLR. Mechanical complications of STEMI were defined by STEMI combined with sudden cardiac arrest, stent thrombosis, pericardial effusion, post myocardial infarction (MI) pericarditis, and post MI ventricular septal rupture, free-wall rupture, left ventricular thrombus, and acute mitral regurgitation during hospitalization. 
		                        		
		                        			Results:
		                        			Patients in the high NLR group (> 4.90) had higher risk of mechanical complications of STEMI (P = 0.001) compared with those in the low and intermediate groups (13% vs. 13% vs. 23%). On multivariable analysis, NLR remained an independent predictor for mechanical complications of STEMI (RR = 1.947, 95% CI = 1.136–3.339, P= 0.015) along with symptom-to balloon time (P = 0.002) and left ventricular dysfunction (P < 0.001). 
		                        		
		                        			Conclusion
		                        			NLR at ER is an independent predictor of mechanical complications of STEMI undergoing primary PCI. STEMI patients with high NLR are at increased risk for complications during hospitalization, therefore, needs more intensive treatment after PCI.
		                        		
		                        		
		                        		
		                        	
3.Clinical and Echocardiographic Factors Affecting Tricuspid Regurgitation Severity in the Patients with Lone Atrial Fibrillation.
Jae Hyung PARK ; Sung Hee SHIN ; Man Jong LEE ; Myung Dong LEE ; Hyun Ik SHIM ; Jaewoong YOON ; Sehwan OH ; Dae Hyeok KIM ; Sang Don PARK ; Sung Woo KWON ; Seong Ill WOO ; Keum Soo PARK ; Jun KWAN
Journal of Cardiovascular Ultrasound 2015;23(3):136-142
		                        		
		                        			
		                        			BACKGROUND: Atrial fibrillation (AF) can be a risk factor for development of significant tricuspid regurgitation (TR). We investigated which clinical and echocardiographic parameters were related to severity of functional TR in patients with lone AF. METHODS: A total of 89 patients with lone AF were enrolled (75 +/- 11 years; 48% male): 13 patients with severe TR, 36 patients with moderate TR, and 40 consecutive patients with less than mild TR. Clinical parameters and echocardiographic measurements including right ventricular (RV) remodeling and function were evaluated. RESULTS: Patients with more severe TR were older and had more frequently persistent AF (each p < 0.001). TR severity was related to right atrial area and tricuspid annular systolic diameter (all p < 0.001). The patients with moderate or severe TR had larger left atrial (LA) volume and increased systolic pulmonary artery pressure (SPAP) than the patients with mild TR (p = 0.04 for LA volume; p < 0.001 for SPAP). RV remodeling represented by enlarged RV area and increased tenting height was more prominent in severe TR than mild or moderate TR (all p < 0.001). Multivariate analysis showed type of AF, LA volume, tricuspid annular diameter and tenting height remained as a significant determinants of severe TR. In addition, tenting height was independently associated with the presence of severe TR (p = 0.04). CONCLUSION: In patients with lone AF, TR was related to type of AF, LA volume, tricuspid annular diameter and RV remodeling. Especially, tricuspid valvular tethering seemed to be independently associated with development of severe functional TR.
		                        		
		                        		
		                        		
		                        			Atrial Fibrillation*
		                        			;
		                        		
		                        			Echocardiography*
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Multivariate Analysis
		                        			;
		                        		
		                        			Pulmonary Artery
		                        			;
		                        		
		                        			Risk Factors
		                        			;
		                        		
		                        			Tricuspid Valve Insufficiency*
		                        			
		                        		
		                        	
4.High pretransplant HBV level predicts HBV reactivation after kidney transplantation in HBV infected recipients.
Jong Man KIM ; Hyojun PARK ; Hye Ryoun JANG ; Jae Berm PARK ; Choon Hyuck David KWON ; Wooseong HUH ; Joon Hyeok LEE ; Sung Joo KIM ; Jae Won JOH
Annals of Surgical Treatment and Research 2014;86(5):256-263
		                        		
		                        			
		                        			PURPOSE: HBsAg-positive kidney recipients are at increased risk for mortality and graft failure. The aims of this study were to identify the outcomes of HBsAg-positive recipients who received preemptive antiviral agents after successful kidney transplantation and to analyze risk factors for HBV reactivation. METHODS: We retrospectively reviewed the medical records of 944 patients performed kidney transplantation between 1999 and 2010. RESULTS: HBsAg-negative recipients were 902 patients and HBsAg-positive recipients, 42. Among HBsAg-positive recipients, HBV reactivation was detected in 7 patients and well controlled by switch or combination therapy. Graft failure developed in only one patient due to chronic rejection regardless of HBV reactivation but no deaths occurred. All patients were alive at the end of follow-up and none developed end-stage liver disease or hepatocellular carcinoma. There was statistically significant difference in graft survival between HBsAg-positive recipients and HBsAg-negative. Multivariate analysis identified increased HBV DNA levels (>5 x 10(4) IU/mL) in the HBsAg-positive kidney transplant recipients as a risk factor for HBV reactivation (P = 0.007). CONCLUSION: Effective viral suppression with antiviral agents in HBsAg-positive renal transplant recipients improves patient outcome and allograft survival. Antiviral therapy may be especially beneficial in patients with high HBV DNA levels prior to transplantation.
		                        		
		                        		
		                        		
		                        			Allografts
		                        			;
		                        		
		                        			Antiviral Agents
		                        			;
		                        		
		                        			Carcinoma, Hepatocellular
		                        			;
		                        		
		                        			DNA
		                        			;
		                        		
		                        			Follow-Up Studies
		                        			;
		                        		
		                        			Graft Survival
		                        			;
		                        		
		                        			Hepatitis B virus
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Kidney
		                        			;
		                        		
		                        			Kidney Transplantation*
		                        			;
		                        		
		                        			Liver Diseases
		                        			;
		                        		
		                        			Medical Records
		                        			;
		                        		
		                        			Mortality
		                        			;
		                        		
		                        			Multivariate Analysis
		                        			;
		                        		
		                        			Retrospective Studies
		                        			;
		                        		
		                        			Risk Factors
		                        			;
		                        		
		                        			Transplantation
		                        			;
		                        		
		                        			Transplants
		                        			
		                        		
		                        	
5.Pre-transplant Predictors for 3-Month Mortality after Living Donor Liver Transplantation.
Nuri LEE ; Jong Man KIM ; Choon Hyuck David KWON ; Jae Won JOH ; Dong Hyun SINN ; Joon Hyeok LEE ; Mi Sook GWAK ; Seung Woon PAIK ; Suk Koo LEE
The Journal of the Korean Society for Transplantation 2014;28(4):226-235
		                        		
		                        			
		                        			BACKGROUND: High model for end-stage liver disease (MELD) scores (> or =35) is closely associated with poor posttransplantation outcomes in patients who undergo living donor liver transplantation (LDLT). There is little information regarding factors that negatively impact the survival of patients with high MELD scores. The aim of this study was to identify factors associated with 3-month mortality of patients after LDLT. METHODS: We retrospectively analyzed 774 patients who underwent adult LDLT with right lobe grafts between 1996 and 2012. Exclusion criteria were re-transplantation, left graft, auxiliary partial orthotopic liver transplantation, and inadequate medical recording. Preoperative variables were analyzed retrospectively. RESULTS: The overall 3-month survival rate was 92%. In univariate analysis, acute progression of disease, severity of hepatic encephalopathy, Child-Pugh class C, hepatorenal syndrome, use of continuous renal replacement therapy, use of ventilator, intensive care unit (ICU) care before transplantation, and MELD scores > or =35 were identified as potential risk factors. However, only ICU care before transplantation and MELD scores > or =35 were independent risk factors for 3-month mortality after LDLT. Three-month and 1-year patient survival rates for those with no risk factors were 95.5% and 88.6%, respectively. In contrast, patients with at least one risk factor had 3-month and 1-year patient survival rates of 88.4% and 81.1%, respectively, while patients with two risk factors had 3-month and 1-year patient survival rates of 55.6% and 55.6%, respectively. CONCLUSIONS: Patients with both risk factors (ICU care before LDLT and MELD scores > or =35) should be cautiously considered for treatment with LDLT.
		                        		
		                        		
		                        		
		                        			Adult
		                        			;
		                        		
		                        			End Stage Liver Disease
		                        			;
		                        		
		                        			Hepatic Encephalopathy
		                        			;
		                        		
		                        			Hepatorenal Syndrome
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Intensive Care Units
		                        			;
		                        		
		                        			Liver Diseases
		                        			;
		                        		
		                        			Liver Transplantation*
		                        			;
		                        		
		                        			Living Donors*
		                        			;
		                        		
		                        			Medical Records
		                        			;
		                        		
		                        			Mortality*
		                        			;
		                        		
		                        			Renal Replacement Therapy
		                        			;
		                        		
		                        			Retrospective Studies
		                        			;
		                        		
		                        			Risk Factors
		                        			;
		                        		
		                        			Survival Rate
		                        			;
		                        		
		                        			Transplants
		                        			;
		                        		
		                        			Ventilators, Mechanical
		                        			
		                        		
		                        	
6.Can the model for end-stage liver disease score replace the indocyanine green clearance test in the selection of right hemihepatectomy in Child-Pugh class A?.
Jong Man KIM ; Choon Hyuck David KWON ; Jae Won JOH ; Jae Berm PARK ; Joon Hyeok LEE ; Gaab Soo KIM ; Sung Joo KIM ; Seung Woon PAIK
Annals of Surgical Treatment and Research 2014;86(3):122-129
		                        		
		                        			
		                        			PURPOSE: To identify the correlation of the model for end-stage liver disease (MELD) scores with the assessment of the risk of hepatic function after hemihepatectomy in patients with hepatocellular carcinoma (HCC) related to hepatitis B virus (HBV). METHODS: A case-control study was performed based on data for 141 consecutive patients who underwent curative right hepatic resection between January 2006 and June 2010. RESULTS: All patients were Child-Pugh class A. The mean age of the patients was 50 years (range, 29-73 years). The group included 114 men (80.9%) and 27 women (19.1%). The distribution of MELD scores (median, 7; range, 6-14) and indocyanine green retention rate at 15 minutes (ICG-R15) (median, 9.2%; range, 1.1%-19.5%) showed no significant correlation (P = 0.615). Only one perioperative death (0.7%) occurred within 30 days, which was the result of liver failure by hepatic artery dissection during the Pringle maneuver. Hepatic dysfunction occurred in 25 patients (17.7%) after liver resection. In multivariate analysis, male gender, increased HBV DNA level, and elevated serum aspartate transaminase level were significantly related with hepatic dysfunction. Tumor size and satellite nodule were closely associated with tumor recurrence in HBV-related HCC after right hemihepatectomy and satellite nodule was a predisposing factor for mortality in those patients. CONCLUSION: MELD score does not accurately predict hepatic function after right hemihepatectomy in patients with resectable HBV-related HCC. MELD scores were not correlated with the ICG-R15 values in patients with Child-Pugh class A.
		                        		
		                        		
		                        		
		                        			Aspartate Aminotransferases
		                        			;
		                        		
		                        			Carcinoma, Hepatocellular
		                        			;
		                        		
		                        			Case-Control Studies
		                        			;
		                        		
		                        			Causality
		                        			;
		                        		
		                        			DNA
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Hepatectomy
		                        			;
		                        		
		                        			Hepatic Artery
		                        			;
		                        		
		                        			Hepatitis B virus
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Indocyanine Green*
		                        			;
		                        		
		                        			Liver Diseases*
		                        			;
		                        		
		                        			Liver Failure
		                        			;
		                        		
		                        			Liver Function Tests
		                        			;
		                        		
		                        			Liver*
		                        			;
		                        		
		                        			Male
		                        			;
		                        		
		                        			Mortality
		                        			;
		                        		
		                        			Multivariate Analysis
		                        			;
		                        		
		                        			Recurrence
		                        			
		                        		
		                        	
7.Laparoscopic treatment for post-cholecystectomy Mirizzi syndrome.
Man Sup LIM ; Jang Yong JEON ; Jae Woo KWON ; In Gyu KIM ; Ji Woong CHO ; Jong Hyeok KIM ; Hong Il HA ; Joo Seop KIM
Korean Journal of Hepato-Biliary-Pancreatic Surgery 2013;17(2):79-82
		                        		
		                        			
		                        			The remnant cystic duct or gallbladder neck calculus may rarely result in post-cholecystectomy Mirizzi syndrome. Various managements have been proposed for the treatment of post-cholecystectomy Mirizzi syndrome. Some previous cases of post-cholecystectomy Mirizzi syndrome have been managed with open cholecystectomy and endoscopically. We report a case of a laparoscopic stone removal of post-cholecystectomy Mirizzi syndrome that developed 7 months after laparoscopic cholecystectomy. To our knowledge, this is the first case of laparoscopic management of post-cholecystectomy Mirizzi syndrome. The mechanism, diagnosis and treatment of post-cholecystectomy Mirizzi syndrome are discussed.
		                        		
		                        		
		                        		
		                        			Calculi
		                        			;
		                        		
		                        			Cholecystectomy
		                        			;
		                        		
		                        			Cholecystectomy, Laparoscopic
		                        			;
		                        		
		                        			Cystic Duct
		                        			;
		                        		
		                        			Gallbladder
		                        			;
		                        		
		                        			Gallstones
		                        			;
		                        		
		                        			Mirizzi Syndrome
		                        			;
		                        		
		                        			Neck
		                        			
		                        		
		                        	
8.Primary hepatic neuroendocrine carcinoma.
Jong Man KIM ; Se Yeong KIM ; Choon Hyuck David KWON ; Jae Won JOH ; Jae Berm PARK ; Joon Hyeok LEE ; Sung Joo KIM ; Cheol Keun PARK
Korean Journal of Hepato-Biliary-Pancreatic Surgery 2013;17(1):34-37
		                        		
		                        			
		                        			A 67-year-old woman was admitted to our hospital under suspicion of a hepatic tumor, which had been previously diagnosed to be an adenocarcinoma by fine needle aspiration. Computed tomography and magnetic resonance imaging revealed a large tumor measuring 9 cm in diameter in Couinaud's hepatic segments 4, 5, and 8. We diagnosed the patient to have primary liver cancer, and suspected intrahepatic cholangiocarcinoma preoperatively. We performed a central hepatectomy. According to the immunohistochemical findings of the resected specimen, the tumor was diagnosed to be a primary neuroendocrine carcinoma in the liver. The patient is presently alive without recurrence at 3 months after hepatic resection.
		                        		
		                        		
		                        		
		                        			Adenocarcinoma
		                        			;
		                        		
		                        			Biopsy, Fine-Needle
		                        			;
		                        		
		                        			Carcinoma, Neuroendocrine
		                        			;
		                        		
		                        			Cholangiocarcinoma
		                        			;
		                        		
		                        			Chromogranin A
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Hepatectomy
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Liver
		                        			;
		                        		
		                        			Liver Neoplasms
		                        			;
		                        		
		                        			Magnetic Resonance Imaging
		                        			;
		                        		
		                        			Recurrence
		                        			
		                        		
		                        	
9.Hexamethylmelamine as Consolidation Treatment for Patients with Advanced Epithelial Ovarian Cancer in Complete Response after First-Line Chemotherapy.
Yong Soon KWON ; Joo Hyun NAM ; Dae Yeon KIM ; Dae Shik SUH ; Jong Hyeok KIM ; Yong Man KIM ; Young Tak KIM
Journal of Korean Medical Science 2009;24(4):679-683
		                        		
		                        			
		                        			The aim of this study was to assess the efficacy of consolidation therapy with hexamethylmelamine (HMM) in patients with advanced epithelial ovarian cancer (EOC). Patients treated at our hospital between January 1997 and November 2006 and in documented clinical complete response from advanced ovarian cancer following front-line platinum-based therapy were retrospectively analyzed. The patients treated with HMM were compared to the patients of matched counterpart without consolidation therapy. Of 102 patients enrolled, 49 were treated with HMM and 53 received no consolidation treatment. For patients with HMM and observed patients, the mean age were 54.6 and 55.6 yr; the distribution of stage was similar (P=0.977); the optimal surgery was performed in 36 (73.5%) and 44 (83%) (P=0.336); the recurrence rate were 27 (55.1%) and 33 (62.3%) (P=0.463); and the median progression-free survival were 38 months and 21 months for patients with HMM and observed patients (P=0.235). No treatment-related adverse events were reported during the follow-up period. Although this study failed to show the significant survival benefit of consolidation therapy with HMM in patients with advanced EOC, we consider that our study can contribute data to investigate the effectiveness of consolidation therapy in epithelial ovarian cancer.
		                        		
		                        		
		                        		
		                        			Altretamine/*therapeutic use
		                        			;
		                        		
		                        			Antineoplastic Agents, Alkylating/*therapeutic use
		                        			;
		                        		
		                        			Antineoplastic Combined Chemotherapy Protocols/therapeutic use
		                        			;
		                        		
		                        			Disease-Free Survival
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Middle Aged
		                        			;
		                        		
		                        			Neoplasm Staging
		                        			;
		                        		
		                        			Neoplasms, Glandular and Epithelial/*drug therapy/mortality
		                        			;
		                        		
		                        			Ovarian Neoplasms/*drug therapy/mortality
		                        			;
		                        		
		                        			Retrospective Studies
		                        			
		                        		
		                        	
10.Relation between clinicopathological factors and the proportion of regulatory T lymphocytes in patients with cervical cancers.
Yong Soon KWON ; Yong Man KIM ; Ha Young LEE ; Shin Wha LEE ; Jung Nam LEE ; Jong Hyeok KIM ; Young Tak KIM ; Joo Hyun NAM
Korean Journal of Obstetrics and Gynecology 2007;50(12):1706-1711
		                        		
		                        			
		                        			OBJECTIVE: The aim of this study is to determine which clinicopathological factors have the significance in proportion of regulatory T lymphocytes in patients with cervical cancers. METHODS: Blood samples were collected preoperatively from 17 patients with uterine cervical cancers (stage: IB, IIA) diagnosed at Asan medical center from May 2006 to October 2006. Patients were limited to who never been treated after diagnosis. We analyzed phenotypes of lymphocytes through flow cytometry by using anti CD3 antibodies, anti CD4 antibodies, anti CD25 antibodies and anti Transcription Factor Foekhead Box P3 (FoxP3) antibodies. Following analysis by flow cytometry, it was determined the relation between the proportion of regulatory T lymphocytes and clinicopathological factors of patients, including age, height, weight, BMI, maximum tumor diameter, lymphovascular tumor emboli, parametrial invasion, and lymph node metastasis. RESULTS: Among many clinicopathological factors in patients with cervical cancer, only maximum tumor diameter was significantly correlated with the proportion of CD4+CD25+(high)FoxP3+ regulatory T lymphocytes (p=0.012, Spearman's rho Correlation Coefficient=0.593). CONCLUSION: This is the first report to document the relation between uterine cervical cancer and the proportion of regulatory T lymphocytes in peripheral blood. In terms of positive correlation between the primary tumor size and the proportion of regulatory T lymphocytes in peripheral blood, we suggest that the spread mechanism of uterine cervical caner, especially direct invasion, will be related with the anti-tumor immune tolerance state. Further studies are necessary to explain the specific spread mechanisms and systemic antitumor immunity in cervical cancer.
		                        		
		                        		
		                        		
		                        			Antibodies
		                        			;
		                        		
		                        			Antibodies, Anti-Idiotypic
		                        			;
		                        		
		                        			Chungcheongnam-do
		                        			;
		                        		
		                        			Diagnosis
		                        			;
		                        		
		                        			Flow Cytometry
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Immune Tolerance
		                        			;
		                        		
		                        			Lymph Nodes
		                        			;
		                        		
		                        			Lymphocytes
		                        			;
		                        		
		                        			Neoplasm Metastasis
		                        			;
		                        		
		                        			Phenotype
		                        			;
		                        		
		                        			T-Lymphocytes, Regulatory*
		                        			;
		                        		
		                        			Transcription Factors
		                        			;
		                        		
		                        			Uterine Cervical Neoplasms
		                        			
		                        		
		                        	
            
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