1.Clinical investigation of the children's calcaneus fracture.
Chang Ju LEE ; Won Ho CHO ; Ho Geun CHANG ; Su Jung COI ; Kyung Bum YOO
The Journal of the Korean Orthopaedic Association 1993;28(5):1767-1773
No abstract available.
Calcaneus*
2.Alterations in Left ventricular End-systolic Wall Stress During Short-term Follow-up After Correction of Isolated Congenital Aortic Stenosis.
Si Ho KIM ; Young Hwan PARK ; Yoo Sun HONG ; Do Kyun KIM ; Bum Koo CHO
The Korean Journal of Thoracic and Cardiovascular Surgery 2000;33(10):777-784
BACKGROUND: Congenital aortic stenosis in children is characterized by "excessive" left ventricular hypertrophy with reduced left ventricular systolic wall stress that allows for supernormal ejection performance. We hypothesized that left ventricular wall stress was decreased immediately after surgical correction of pure congenital aortic stenosis. Also measuring postoperative left ventricular wall stress was a useful noninvasive measurement that allowed direct assessment for oxygen consumption of myocardium than measuring the peak systolic pressure gradient between ascending aorta and left ventricle for the assessment of surgical results. MATERIAL AND METHOD: Between September 1993 and August 1999, 8 patients with isolated congenital aortic stenosis who underwent surgical correction at Yonsei cardiovascular center were evaluated. There were 6 male and 2 female patients ranging in age from 2 to 11 years(mean age, 10 years). Combined Hemodynamic-Ultrasonic method was used for studying left ventricular wall stress. We compared the wall stress peak systolic pressure gradient and ejection fraction preoperatively and postoperatively. RESULT: After surgical correction peak aortic gradient fell from 58.4+/-17.6, to 23.7+/-17.7 mmHg(p=0.018) and left ventricular ejection fraction decreased but it is not statistically significant. In the consideration of some factors that influence left ventricular end-systolic wall stress excluding one patient who underwent reoperation for restenosis of left ventricular outflow tract left ventricular end-systolic pressure and left ventricular end-systolic dimension were fell from 170.6+/-24.3 to 143.7+/-27.1 mmHg and from 1.78+/-0.4 to 1.76+/-0.4 cm respectively and left ventricular posterior wall thickness was increased from 1.10+/-0.2, to 1.27+/-0.3cm but it was not statistically singificant whereas left ventricular end-systolic wall stress fell from 79.2+/-24.9 to 57.1+/-27.6 kdynes/cm2(p=0.018) in 7 patients. For one patient who underwent reoperation peak aortic gradient fell from 83.0 to 59.7 mmHg whereas left ventricular end-systolic wall stress increased from 67.2 to 97.0 kdynes/cm2 The intervals did not change significnatly. CONCLUSION: We believe that probably some factors that are related to left ventricular geometry influenced the decreased left ventricular wall stress immediately after surgical correction of isolated congenital aortic stenosis. Left ventricular wall stress is a noninvasive measurement and can allow for more direct assesment than measuring peak aortic gradient particularly in consideration of the stress and oxygen consumption of the myocardium therefore we can conclude it is a useful measurement for postoperative assessment of congenital aortic stenosis.
Aorta
;
Aortic Valve Stenosis*
;
Blood Pressure
;
Child
;
Equidae
;
Female
;
Follow-Up Studies*
;
Heart Ventricles
;
Humans
;
Hypertrophy, Left Ventricular
;
Male
;
Myocardium
;
Oxygen Consumption
;
Reoperation
;
Stroke Volume
3.Two cases of ovarian pregnancy.
Bum Chae CHOI ; Soo Nyung KIM ; In Jae CHO ; Doo Ho KIM
Korean Journal of Obstetrics and Gynecology 1993;36(3):409-414
No abstract available.
Female
;
Pregnancy
;
Pregnancy, Ectopic*
5.A Case of Surgically Corrected-Combined form of Total Anomalous Pulmonary Venous Return.
Dae Sung HWANG ; Sun Hwan CHO ; Jong Bum CHOI ; Hyang Suk YOON ; Soon Ho CHOI
Korean Circulation Journal 1992;22(3):473-478
Total anomalous pulmonary venous return(connection) is a congenital heart disease. Especially, the reports of the patients with double connections of all pulmonary veins were rare. An infant who underwent operation for total anomalous pulmonary venous return had double drainge of all pulmonary veins to both left vertical vein and anomalous descending vein. This second lesion was not diagnosed preoperatively, but in operative field. Operative treatments were performed by ligation of left vertical vein and central pulmonary vein-to-left atrium anastomosis without ligation of the descending anomalous vein. For these less common variants fo total anomalous pulmonary venous return,a more detailed and precise understanding of morphology can facilitate accurate surgical repair. And also, early detection of the disease is an another issue for a good prognosis.
Heart Defects, Congenital
;
Humans
;
Infant
;
Ligation
;
Prognosis
;
Pulmonary Veins
;
Scimitar Syndrome*
;
Veins
6.Treatment of spontaneous pneumothorax: In patients 50 years of age or older.
Sun Hwan CHO ; Tae Geun RIM ; Jong Bum CHOI ; Soon Ho CHOI
The Korean Journal of Thoracic and Cardiovascular Surgery 1993;26(7):532-537
No abstract available.
Humans
;
Pneumothorax*
7.A case of intrauterine fetal death from umbilical cord torsion.
Yong Bum KIM ; Yong Won PARK ; Jae Sung CHO ; Chan Ho SONG
Korean Journal of Obstetrics and Gynecology 1993;36(7):2005-2009
No abstract available.
Fetal Death*
;
Umbilical Cord*
8.Noninvasive Evaluation of Coronary Artery Bypass Graft Patency by Electron Beam Tomography.
Gyu Ok CHOI ; Ho Suk KIM ; Bum Koo CHO
The Korean Journal of Thoracic and Cardiovascular Surgery 1999;32(8):693-701
Recently non-invasive diagnostic imaging replaced the invasive catheter angiography in the diagnosis of vascular disease. Catheter methods are now almost confined to the purpose of intervention. Coronary artery or coronary artery bypass graft still needs catheter technique because of small diameter and the cardiac motion. The last challenge for radiologists in this domain is to obtain a non-invasive imaging. Electron beam tomography(EBT) for high temporal resolution is able to obtain a coronary arteriogram or coronary artery bypass graft (CABG), of which CABG imaging is quite useful for the evaluation of patency. In our experience as well as others, the accuracy of EBT angiogram in evaluating CABG patency revealed that the accuracy of patency of saphenous vein grafts(SVG) is high due to relatively wide lumen, short and straight course and less influence from cardiac motion. The sensitivity and specificity of patency of SVGs were 92%, 97% respectively in the prospective evaluat on and 100% each in the retrospective evaluation. A false positive and a false negative case are rudimentary errors in the initial learing period. In contrast the analysis of left internal mammary artery(LIMA) graft was difficult due to the inherent small size and the adjacent surgical clips provoking beam-hardening artifact; therefore, the method of combining 3 dimensional reconstruction and flow mode study was important in improving the accuracy of LIMA patency. The sensitivity and specificity of LIMA patency were 100% and 80% in both prospective and retrospective evaluation. Therefore, EBT angiography is an accurate non-invasive diagnostic modality for evaluating the patency of CABG, particularly in SVGs. The accuracy can be improved with the improvement of the EBT and the development of the image reconstruction software.
Angiography
;
Artifacts
;
Catheters
;
Coronary Artery Bypass*
;
Coronary Vessels*
;
Diagnosis
;
Diagnostic Imaging
;
Image Processing, Computer-Assisted
;
Prospective Studies
;
Retrospective Studies
;
Saphenous Vein
;
Sensitivity and Specificity
;
Surgical Instruments
;
Tomography, X-Ray Computed*
;
Transplants
;
Vascular Diseases
9.A STUDY ON MARGINAL FIDELITY OF CERAMIC METAL COPINGS TREATED BY VARIOUS METHODS.
Bum Mo KOO ; Ju Hwan LIM ; In Ho CHO
The Journal of Korean Academy of Prosthodontics 1997;35(2):265-276
The effect of thermocycling and surface finishing on the marginal fidelity of copings for a metal ceramic crown was examined. Methods for minimizing the loss of marginal fidelity were evaluated. The results were as follows ; 1. Thermocycling of ceramic metal coping resulted in increased marginal gap. 2. The greatest marginal gap occurred during the first thermocycling of the copings. 3. No additional distortion of marginal fidelity occurred when surface finishing and second thermocycling were completed after initial thermocycling. 4. The gab increases according to various treatment methods showed group 1 to be the highest values. 5. There was no significant difference between group 2 and group 3(p>0.05). 6. There was significant difference between group 1 and group 2, 3(p<0.05). 7. There was no significant difference among the measurement sites.
Ceramics*
;
Crowns
10.A STUDY ON MARGINAL FIDELITY OF CERAMIC METAL COPINGS TREATED BY VARIOUS METHODS.
Bum Mo KOO ; Ju Hwan LIM ; In Ho CHO
The Journal of Korean Academy of Prosthodontics 1997;35(2):265-276
The effect of thermocycling and surface finishing on the marginal fidelity of copings for a metal ceramic crown was examined. Methods for minimizing the loss of marginal fidelity were evaluated. The results were as follows ; 1. Thermocycling of ceramic metal coping resulted in increased marginal gap. 2. The greatest marginal gap occurred during the first thermocycling of the copings. 3. No additional distortion of marginal fidelity occurred when surface finishing and second thermocycling were completed after initial thermocycling. 4. The gab increases according to various treatment methods showed group 1 to be the highest values. 5. There was no significant difference between group 2 and group 3(p>0.05). 6. There was significant difference between group 1 and group 2, 3(p<0.05). 7. There was no significant difference among the measurement sites.
Ceramics*
;
Crowns