BACKGROUND AND OBJECTIVES: Ablation of the slow pathway in patients with atrioventricular nodal reentrant tachycardia (AVNRT) can be performed by using a specific intracardiac electrogram findings predicting a successful radiofrequency catheter ablation. The purpose of the present study is to recognize a specific intracardiac electrogram findings predicting a successful sites of radiofrequency catheter ablation in patients with AVNRT. MATERIALS AND METHODS: The study population consisted of the 18 patients (7 males, mean age:46 yr) to undergo successful catheter ablation using radiofrequency current in order to eliminate AVNRT from January 1993 to september 1994. We have analyzed local intracardiac electrogram at successful and unsuccessful sites of radiofrequency catheter ablation before the radiofrequency application: Atrial electrogram amplitude, duration, number of peaks in atrial electrogram, atrial/ventricular (A/V) electrogram amplitude ratio, and presence of His potential and/or slow potential. RESULTS: Of 18 patients, 16 patients underwent a slow pathway ablation, the other 2 patients a fast pathway ablation. The mean A/V electrogram amplitude ratio at successful and unsuccessful sites was 0.69+/-0.91 and 1.86+/-2.03, respectively. The mean atrial electrogram duration and number of peaks at successful and unsuccessful sites was 57+/-16 msec vs 69+/-16 msec and 1.7+/-0.5 vs 2.2+/-0.7, respectively. His bundle electrogram was seen in one slow pathway ablated and one fast pathway ablated patient. No slow potential could be identified in any of these 18 patients. CONCLUSION: We think that A/V electrocardiogram amplitude ratio below 0.5 at posterior interatrial septum along tricuspid annulus is important marker indicating a successful ablation sites.
Catheter Ablation* ; Electrocardiography ; Electrophysiologic Techniques, Cardiac* ; Humans ; Male ; Tachycardia, Atrioventricular Nodal Reentry*

No abstract available.
Hyperhidrosis

The blow-out fracture can be reconstructed by various autogeneous and alloplastic material. Particulate, nonresorbable hydroxyapatite is currently one of the choice of implant material available for reconstruction of blow-out fracture. Hydroxyapatite is radiopaque ceramic, physically and chemically similar to enamel and cortical bone. It is a biomaterial derived from natural corals to use as a bone graft substitute. And we looked into the clinical usefulness of 2 type of hydroxyapatite with their advantages and disadvantages in reconstruction of blow-out fracture. 183 patients with blow-out fracture who underwent surgical reconstruction with two types of hydroxyapatite from March 1933 to July 1977 have been analyzed the results of surgical reconstructions, and have been followed up for more than a year. And the condition of formerly inserted hydroxyapatite was observed in the patients who needed 2nd surgical reconstruction due to the enophthalmos. The disadvantages of hydroxyapatite are fragility, size and contour limitations. In spite of these demerits, hydroxyapatite can be one of the prospective materials to reconstruct orbital floor. Through the clinical experiences for 5 years, we have not found any of complications of exposure, infection, and foreign body reaction. Low rates of diplopia, limitation of ocular movement, and enophtalmos was observed. Hydroxyapatite was well adherent to adjacent orbital bone in most patients who needed secondary reconstruction for enopthalmos. In conclusion, our study shows that the availability of hydroxyapattite in reconstruction of blow-out fracture is recommendable, with low complication rates. Hydroxyapatite important appears to be well tolerated, and provides useful alloplastic prosthesis with few problems in reconstruction of blow-out fracture.
Anthozoa ; Ceramics ; Dental Enamel ; Diplopia ; Durapatite* ; Enophthalmos ; Foreign-Body Reaction ; Humans ; Orbit* ; Orbital Fractures* ; Prostheses and Implants ; Transplants

No abstract available.
Carcinogens* ; Colon* ; Colonic Neoplasms* ; Humans*

No abstract available.
Cytomegalovirus* ; DNA* ; Humans* ; Polymerase Chain Reaction*

No abstract available.
Oncogenes* ; Rectal Neoplasms*

No abstract available.
Child* ; Evoked Potentials, Auditory, Brain Stem* ; Humans

No abstract available.
Bartter Syndrome*

OBJECTIVE: To evaluate the efficacy of low dose gonadotropin releasing hormone agonist(GnRH-a) therapy combined with high dose human menopausal gonadotrpin(hMG) following estrogen & progesteron therapy for poor responders. METHODS: From May 1997 to Feb 1999, 36 patients who were defined as poor responders on previous consecutive two and more superovulation cycles were randomly allocated to lowdose GnRH-a short protocol with high dose hMG protocol pretreated with estrogen & progesterone(E/P therapy)(n=16)(study group) and the clomiphene citrate with hMG(n=20)(control group). All patients were planned to undergone in-vitro- fertilization(IVF) and embryo transfer(ET) after controlled ovarian hyperstimulation(COH). RESULTS: Two groups were similar with respect to clinical features and basal FSH and E2 levels. The mean level of E2 on day 5, 304.3+/-148.ng/ml in study group was significantly higher than that in control group, 182+/-34.9ng/ml. The mean levels of E2 on hCG day was also significantly higher in study group than control group(1324+/-320ng/ml, vs 414+/-168ng/ml). The mean day of hCG day in study group, 12.3+/-0.3 was shorter than that in control group, 13.8+/-0.4. The concellation rates of cycles were significantly lower in study group than control group(13.2% vs 84.2%). But clinical pregnancy rates did not showed the significant difference between two groups. CONCLUSION: The study suggested that a lowdose GnRH-a short protocol with high dose hMG pretreated with estrogen & progesterone can improve the ovarian response in poor responder group.
Clomiphene ; Embryonic Structures ; Estrogens ; Gonadotropin-Releasing Hormone* ; Humans ; Pregnancy Rate ; Progesterone ; Superovulation

No abstract available.
Adult* ; Humans ; Life Style*