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Original Article
Depolarization, Repolarization Inhomogeneity and Late Potential after Surgical Repair of Tetralogy of Fallot
Soo Young Kim, Myung Chul Hyun, Sang Bum Lee, Seung Tae Kim, Jong Soo Lee
Clin Exp Pediatr. 1999;42(8):1071-1077.   Published online August 15, 1999
Purpose : After repair of tetralogy of Fallot(TOF), ventricular arrhythmia and sudden death remain as serious late complications which are due to right ventricular systolic and diastolic overloading, exposure to hypoxia and surgical scar. Among the various methods for predicting the risk of such complications, we evaluated signal average ECG(SAECG), QRS duration, QT and JT dispersion, cardiothoracic(CT) ratio, age at...
Assessment of Regional Wall Motion of the Left Ventricle in Children with Congenital Heart Disease
Chang Hee Han, Jun Ho Huh, Un Seok Nho, Byung Ho Choi, Myung Chul Hyun, Sang Bum Lee
Clin Exp Pediatr. 1999;42(6):807-816.   Published online June 15, 1999
Purpose : To assess wall motion of the left ventricle in the various forms of congenital heart disease and to select appropriate methods by which to gauge left ventricular wall motion. Methods : We evaluated left ventricular function, including volume, global ejection fraction, and regional wall motion(Centerline method, Local Ejection Fraction, Curved Perimeter method and Radial method). The evaluation was done...
Clinical Observations of Coarctation of the Aorta
Hui Jung Cho, Chang Ho Ha, Dong Seok Lee, Myung Chul Hyun, Sang Bum Lee
Clin Exp Pediatr. 1999;42(4):519-525.   Published online April 15, 1999
Purpose : Due to controveries surrounding in the incidence of coarctation of aorta which reports previously stated rare among Orientals, we evaluated clinical characteristics, natural courses of coarctation of aorta and effects of different surgical modalities. Methods : Medical records of 51 patients with coarctation of aorta, diagnosed by 2-dimensional echocardiography in Kyungpook University Hospital Pediatric Cardiac Laboratory from June 1985...
Fixed Subaortic Stenosis in Children
Eun Jin Choi, Byung Ho Choi, Myung Chul Hyun, Sang Bum Lee
Clin Exp Pediatr. 1997;40(4):505-511.   Published online April 15, 1997
Purpose : This study attempted to describe the Doppler and two-dimensional echocardiographic features of fixed subaortic stenosis, the de novo occurrence and progression of this lesion and to review its etiology, treatment and course. Methods : We studied 17 patients of fixed subaortic stenosis who, between Jan. 1993 and Jan. 1996, ware diagnosed by echocardiographic examination at Kyungpook National University Hospital....
Myocardial Functions Estimated by Pulsed Doppler Echocardiography in Patientswith Chronic Renal Failure
Hyun June Huh, Byung Ho Choi, Myung Chul Hyun, Sang Bum Lee
Clin Exp Pediatr. 1996;39(12):1712-1728.   Published online December 15, 1996
Purpose : The objectives of this study were to estimate myocardial functions in patients with chronic renal failure by pulsed Doppler echocardiography, and investigate correlation between Doppler and disease parameters. Methods : We studied 13 patients with chronic renal failure whose creatinine clearance rate less than 25ml/min. Using pulsed Doppler echocardiography with curve following method, we measured peak velocity, mean velocity, velocity-time integral and peak...
Clinical Course of the Ostium Secundum Atrial Septal Defect(ASD) and Its Rate of Spontaneous Closure
Dae Yong Kim, Myung Chul Hyun, Sang Bum Lee
Clin Exp Pediatr. 1996;39(11):1538-1543.   Published online November 15, 1996
Purpose : To know the natural course of the ostium secundum ASD including its rate of spontaneous closure. Methods : We studied 259 cases who were diagnosed as ostium secundum ASD by 2D-echocardiography at Department of Pediatrics, Kyungpook National University Hospital between Jan. 1985 and Dec. 1994. According to the age at diagnosis, we divided them into two groups, group I (those diagnosed before 1...
Clinical Course of Atrioventricular Septal Defect(AVSD) in Down and non Down syndrome
Un Seok Nho, Myung Chul Hyun, Sang Bum Lee
Clin Exp Pediatr. 1996;39(9):1288-1294.   Published online September 15, 1996
Purpose : It is well known that 1/3 - 1/2 of Atrioventricular septal defect(AVSD) patients also have Down syndrome which may influence the clinical course of AVSD. To know the anatomic type of AVSD and the effect of Down syndrome on the clinical course of AVSD, we studied 37 cases( Down group: 14 cases, non Down group: 23 cases) who were diagnosed and...
Serial Changes of Doppler Echocardiographic Transvalvular Velocity during the Neonatal Period in Full Term Neonates
Woo Taek Kim, Myung Chul Hyun, Sang Bum Lee
Clin Exp Pediatr. 1996;39(7):977-986.   Published online July 15, 1996
Purpose : We performed this study to compare serial measurements which relate to both ventricular functions in full term neonates for the first three weeks after birth. Methods : Echocardiographic and pulsed Doppler studies were performed for 20 newborns during the first 36 hours of life, and subsequent serial studies in the second (n=13) and third(n=12) weeks of life. Evaluation included measurements of both...
Clinical Significance of Simple Ventricular Septal Defect
Chang Ro Park, Myung Chul Hyun, Sang Bum Lee
Clin Exp Pediatr. 1996;39(5):652-657.   Published online May 15, 1996
Purpose : To investigate the clinical significance and frequency of simple VSD by location of the defect and hemodynamic severity. Methods : We studied 482 cases who were diagnosed as simple VSD at department of Pediatrics, Kyung Pook University Hospital between December 1983 and July 1993. All cases were diagnosed by 2 dimensional echocardiography and cardiac catheterization was done in 256 cases. Results :...
Change of Coronary Arterial Distensibility by Intravenous Infusion of Adenosine in Kawasaki Disease Patients Who Had Coronary Artery Aneurysm
Myung Chul Hyun
Clin Exp Pediatr. 1995;38(10):1363-1369.   Published online October 15, 1995
Purpose : To investigate the effect of Kawasaki disease on coronary arterial distensibility, we studied 14 patients with Kawasaki disease who had had coronary artery aneurysms(mean of 4.5years have elapsed after onset of Kawasaki disease). Methods : Using Hewiett Packard-1500 echocardiogram, we measured RR interval, BP(blood pressure), EDD(end diastolic dimension), ESD(end systolic dimension), FS(fractional shortening), LVPWT(left ventricular posterior wall thickness), peak...
Serial M-mode Echocardiographic Assessment of Left Ventricular Function in Kawasaki Disease
Byung Ho Choi, Jin Kyung Kim, Myung Chul Hyun, Sang Bum Lee
Clin Exp Pediatr. 1994;37(6):759-766.   Published online June 15, 1994
To investigate the effect of kawasaki disease on left ventricular function, we studied 92 patients with Kawasaki disease at initial visit, after 3 months (78 patients) and after 1 year (9 patients). Using serial M-mode echocardiogram, we obtained LVD(d) (left ventricular internal dimension at end diastole), LVD(s)(left ventricular internal dimension at end systole), FS(fractional shortening), ET(ejection time), VmCF(mean velocity of circumferential...
Plasma Atrial Natriuretic Peptide Concentrations of the Pulmonary artery, Aorta and Veins in Children with Cardiac Disease
Kang Il Lee, Nam Geun Heo, Myung Chul Hyun, Sang Bum Lee, Eun Kyoung Yang, Won Jung Lee
Clin Exp Pediatr. 1994;37(4):481-493.   Published online April 15, 1994
To study the site of release and factors affecting the releases of the atrial natriuretic peptide (ANP) in the pediatric patients, we measured the plasma ANP concentrations in 23 normal healthy children, 19 patients with congestive heart failure and 16 patients with cardiac disease undergoing diagnostic cardiac catheterization. The following results were obtained. 1) The plasma ANP concentrations of the vein (226.3¡¾74.9...
Serial Doppler Echocardiographic Evaluation of Anthracycline Induced Left Ventricular Dysfunction in Children
Nam Geun Heo, Myung Chul Hyun, Kun Soo Lee, Sang Bum Lee
Clin Exp Pediatr. 1993;36(2):214-222.   Published online February 15, 1993
Anthracycline drugs are chemoterapeutic agents highly effective against a wide range of neoplasms. However, its administration may be complicated by cardiotoxic reactions. There is a continuum of increasing risk with increasing total dose of drug rather than an absolute cutoff point for total dose drug of that should not be exceeded under any circumstances. At the present time it appears that a...
A Comparison of Reagent Test Strip-photometer and Laboratory Plasma Glucose Values in Newborns
Jin Kyung Kim, Myung Chul Hyun, Sang Bum Lee, Heng Mi Kim
Clin Exp Pediatr. 1992;35(8):1501-1058.   Published online August 15, 1992
Although reagent test strip-photometer method is frequently used to estimate plasma glucose values in nurseries, the accuracy in newborns have not been evaluated previously. In this study values of 44 samples of laboratory glucose were compared with values simultaneously obtained by reagent test strip-photometer. Laboratory values were determined by glucose oxidase method using veous plasma. Reagent test strip-photometer values were determined...
Changes of immune indices in children with recurrent gross hematuria (IgA nephropathy and non-IgA nephropathy) and Henoch-Schonlein purpura nephritis.
Seong Mi Kim, Myung Chul Hyun, Cheol Woo Ko, Ja Hoon Koo, Doo Hong Ahn, Jung Sik Kwack
Clin Exp Pediatr. 1991;34(3):317-322.   Published online March 31, 1991
A Prospective study was conducted to see the changes of immune system in recurrent gross hematuria (IgA nephropathy and non-IgA nephropathy) and HSP nephritis in children. Study patients consisted of 60 children with recurrent gross hematuria and Henoch-schdnlein purpura nephritis (8 IgA nephropathy, 24 non-IgA nephropathy and 28 HSP nephritis). The cellular immune indices (total T, T4, T8 cells and T4/T8 ratio) and humoral...
Primary Hematuria in Children.
Myung Chul Hyun, Geum Joo Kim, Kuhn Soo Lee, Ja Hoon Koo
Clin Exp Pediatr. 1986;29(5):498-503.   Published online May 31, 1986
A clinico-pathological observation was done on 23 children with primary hematuria, who had been admitted to the Pediatric ward of KNU Hospital from January 1981 to August 1985. All children were undergone percutaneous renal biopsy. The following resullts were obtained; Sex distribution showed male predominance with male to female ratio of 2.8:1 and 11 〜15 years of age group...
Case Report
Three Cases of Glanzmann's Thrombasthenia.
Sung In Baek, Myung Chul Hyun, Haeng Mi Kim, Kun Soo Lee, Doo Hong Ahn, Hyo Jin Chun, Jay Sik Kim
Clin Exp Pediatr. 1985;28(11):1153-1157.   Published online November 30, 1985
We experienced 3 cases of Glanzmann' s thrombasthenia of 2 year-old boy, 4 year-old boy, and 5 year-old girlt who represented with frequent epistaxis and petechia. The later two of them are brother and sister.Laboratory findings were characterized by normal platelet counts, markedly diminished clot retraction, prolonged bleeding time, positive Rumpel-Leede test, abnormal platelet adhesion to glass, and complete failure...