No abstract available.
Echocardiography, Stress*

There have been several methods to prevent the recurrence after pterygium surgery, but no satifactory method has been brought forth. The value of mitomycin, which appeares to offer an important contribution to control the recurence of pterygium postoperatively, seems to be due to its anticancerous effect. Also it can be used himself easily. 1. We instilled Mitomycin solution after Pterygium surgery to the 85 eyes (77 Patients) visited to the department of Ophthalmology, Seoul National Univ. Hospital from July, 1969 to March, 1971. 2. Mitomycin solution was instilled three times a day since postoperative first day for one to two weeks. The solution was prepared by solving the Mitomycin-S in the 5cc of distilled water or Mitomycin-C in the 5cc of of physiologic saline sloution, so the concentration of solution was 0.4mg per cc. 3. We used bare sclera method in pterygium surgery and all the members of staffs and residents participated in. 4. Follow-up study was done by direct examinations or questionnaires. The period of the follow-up was at least 6 months to 26 months. We recieved the answers of 58 eyes, among which 56 eyes(96.6%) did not recur and only 2 eyes (3.4%) recurred. Of no recurrent cases 42 eyes (75%) were cosmetically satisfactory and 14 eyes (25%) were moderately satisfactory by means of the patients themselves evaluation. 5. Many authors said that the operative technique contributes to the rate of recurrence, so we compared the result of staffs' cases with that of residents' in 58 eyes. There was no significant difference in the recurrence rate between staff' and residents' cases inspite of the unskillful techniques of residents. 6. Sid effects of Mitomycin solution appeared in 2 eyes; one had corneal erosion and edema, another severe conjunctival congestion and chemosis which disappeared within a few days by ceasing the instilltation of mitomycin solution.
Edema ; Estrogens, Conjugated (USP) ; Follow-Up Studies ; Humans ; Mitomycin* ; Ophthalmology ; Pterygium* ; Surveys and Questionnaires ; Recurrence ; Sclera ; Seoul ; Sudden Infant Death ; Water

No abstract available.
Brugada Syndrome* ; Bundle-Branch Block* ; Death, Sudden, Cardiac*

Although attachments have been utilized for a retainer of removable prostheses during several decades, there is little information on the force distribution by the attachments. This study was undertaken to evaluate the stress patterns developed by partial dentures employing rigid attachments on the supporting structures. Four types of the mandibular removable partial dentures were designed depending upon the position of the rigid attachment and the existency of lingual bracing. Under 100N of vertical and 25N of lateral loads on the 1st and 2nd lower molar of partial denture, stress distribution patterns and displacement were analysed with three dimensional finite element method by ANSYS version 5.3. 1. The highest stresses were concentrated on the distal alveolar crest of posterior abutment and the second stresses on the apical region of posterior abutment in the models. 2. The greatest displacement were shown on the distal alveolar crest of posterior abutment and the second displacement on the distal alveolar crest of anterior abutment in the models. 3. There was little difference between the models with intraoral attachment and those with extracoronal attachment. 4. There was little difference between the models with and without the lingual bracing.
Braces ; Denture, Partial* ; Denture, Partial, Removable ; Molar ; Prostheses and Implants

OBJECTIVES: To investigate the role of ATP-sensitive potassium channel (KATP) during sustained ventricular fibrillation (VF), the effects of gliburide, a specific blocker of KATP channel and PCO400, an KATP opener, were studied in isolated and perfused swine right ventricular free walls (n=). METHODS: Recording of single cell transmembrane potentials was performed and constructed action potential duration restitution (APDR) curve by plotting APD 90%(APD90) versus preceding diastolic interval (DI). RESULTS: All isolated tissues fibrillated spontaneously. In this preparation, stable VF could persist over a 4-hour period if it was allowed to continue undisturbed (n=). Gliburide (1-5 uM) increased DI without significant changes in APD90 during VF, resulting in more regularization of VF. Higher concentration (10-20 uM) increased both APD90 and DI, and converted to monomorphic ventricular tachycardia (MVT) through the transitional period characterized by APD alternans. PCO400 (1-2.5 uM) caused a significant shortening of APD during MVT and a period of APD alternans became more evident before conversion from MVT to VF. Gliburide eliminated profibrillatory effect of PCO400. This antifibrillatory action of gliburide was accompanied by gradual decrease in the maximum slope of APDR curve during VF. CONCLUSION: KATP channel blockade causes a transition from VF to MVT via lengthening of DI and APD alternans, concomitantly with a reduction of the slope of APD restitution curve.
Action Potentials ; Membrane Potentials ; Potassium Channels ; Swine ; Tachycardia, Ventricular ; Ventricular Fibrillation*

Primary hyperparathyroidism is rarely encountered during pregnancy but its prompt diagnosis and treatment if encountered during pregnancy is important because it can carry considerable morbidity not only for the mother but also for the fetus. It tends to remain undiagnosed because 50~80% of the patients are asymptomatic. Even if they do demonstrate symptoms, those are often nonspecific. The other reason for non-diagnosis is masking of hypercalcemia due to the change of calcium homeostasis during pregnancy. Neonatal tetany can be a clue for the presence and diagnosis maternal hyperparathyroidism. The asymptomatic patient who is diagnosed postpartum when her newborn is symptomatic should undergo elective parathyroidectomy to avoid future complication. We experienced a woman with undiagnosed primary hyperparathyroidism during pregnancy whose two children suffered neonatal tetany. We report this case along with a review of literature on primary hyperparathyroidism in pregnancy and calcium homeostasis during pregnancy.
Calcium ; Child ; Diagnosis ; Female ; Fetus ; Homeostasis ; Humans ; Hypercalcemia ; Hyperparathyroidism* ; Hyperparathyroidism, Primary ; Infant, Newborn ; Masks ; Mothers ; Parathyroidectomy ; Postpartum Period ; Pregnancy* ; Tetany*

No abstract available.
Epstein-Barr Virus Infections* ; Herpesvirus 4, Human* ; Humans ; Lymphoma*

It has been known that right side bypass tract ablation is more difficult and has higher recurrence rate than that of left side bypass tract, and often associated with atrioventricular block in patients with septal bypass tract. Multielectrode basket catheter (MBC) allows simultaneous rapid acquisition of numerous electrical signals generated by a selected surface area or volume of myocardium. We experienced two cases of successful catheter ablation of atrioventricular reentrant tachycardia by right septal bypass tract which were mapped by MBC with greater ease.
Atrioventricular Block ; Catheter Ablation* ; Catheters* ; Humans ; Myocardium ; Recurrence ; Tachycardia*

Primary pulmonary liposarcoma is extremely rare disease. It has poor prognosis with early multiple metastases and frequent local recurrences. Surgery is the choice of treatment for liposarcoma. Incomplete resection would result in rapid and aggressive growing of the tumor. We report a case of primary pulmonary liposarcoma which was successfully treated with complete resection without local recurrence and distant metastasis for 10 months.
Liposarcoma* ; Lung Neoplasms ; Neoplasm Metastasis ; Neoplasm Recurrence, Local ; Prognosis ; Rare Diseases ; Recurrence

BACKGROUND: The presence of diastolic mitral regurgitation has been described in patients with complete atrioventricular(AV) block, aortic valve regurgitation, hypertrophic and restrictive cardiomyopathy, and in patients with long diastolic filling period in atrial fibrillation. However, because of rare incidence and difficulty in making diagnosis of this phenomenon, the frequency and hemodynamic effects of diastolic AV valve regurgitation(DAVVR) and relationship of electrocardiographic(ECG) parameters with DAVVR in patients with complete heart block have not been reported in Korea. METHODS: To evaluate the frequency, hemodynamic effects of DAVVR and relation of ECG parameters with DAVVR in patients with complete AV block, we studied 14 consecutive patients with complete AV block by means of two dimensional and Doppper echocardiography. RESULTS: The DAVVR was observed in all cases of complete AV block except 3 cases on temporary pacemaker. The peak velocy of diastolic mitral and tricuspid valve regurgitaton were 105+/-23cm/sec and 98+/-30cm/sec, respectively. The peak and mean pressure gradient of diastolic mitral regurgitation were 4.7+/-1.7mmHg and 3.1+/-1.5mmHg respectively, and the peak and mean pressure gradient of diastolic tricuspid regurgitation were 4.1+/-2.6mmHg and 2.7+/-2.1mmHg, respectively. There was regular interval between p-wave of ECG and onset of diastolic AV valve regurgitation, which was 215+/-12msec, Diastolic AV valve regurgitation disappeared immediately after recovery of complete AV block to sinus rhythm or insertion of DDD-type permanent pacemaker in all cases. CONCLUSION: In Conclusion, the DAVVR was observed in all cases of complete AV block except cases on temporary pacemaker insertion and its hemodynamic effect was mild. There was regular interval between p-wave of ECG and the onset of diastolic AV valve regurgitation.
Aortic Valve ; Atrial Fibrillation ; Atrioventricular Block* ; Cardiomyopathy, Restrictive ; Diagnosis ; Echocardiography ; Electrocardiography ; Heart Block ; Hemodynamics ; Humans ; Incidence ; Korea ; Mitral Valve Insufficiency ; Tricuspid Valve ; Tricuspid Valve Insufficiency