Poor R-Wave Progression(PRWP) of precordial leads is frequently encountered electrocardiographic findings of uncertain significance and has simply been deemed as suggestion of anterior myocardial infarction without concrete ground. 217 cases with poor R-Wave Progression have been analyzed on clinical records and results are as follows. 1) PRWP was most frequently found in fifties and sixities, comprising 63.9% of the subjects. 2) Co-existent disease entities with PRWP were classified into three categories, cardiovascular diseases, chronic lung diseases and normal variants. 3) The cardiovascular diseases related with PRWP were mainly hypertensive diseases, comprising 59.8% of cardiovascular diseases, followed by ischemic heart disease, valvular heart disease and cardiomyopathies. 4) PRWP may be an early sign of acute myocardial infarction in a certain part of cases, which was endorsed by typical clinical symptoms and enzyme studies. 5) As the criterion of PRWP, V3R equal to or less than 3 mm was thought more adequate for higher specificity rather than 4 mm.
Cardiomyopathies ; Cardiovascular Diseases ; Electrocardiography ; Heart Valve Diseases ; Lung Diseases ; Myocardial Infarction ; Myocardial Ischemia ; Sensitivity and Specificity

OBJECTIVE: The involvement of IGF system in hyperandrogenism and abnormal follicular development is controversial. This study is to assess whether IGF system contribute to it in the women with polycystic ovary(PCO). METHODS: Baseline serum levels of luteinizing hormone (LH), follicle stimulating hormone (FSH), estradiol (E2), testosterone (T), androstenedione (ADD), prolactin, thyroid stimulating hormone (TSH), free insulin-like growth factor(IGF)-I, free IGF-II, insulin-like growth factor binding protein(IGFBP)-1, and IGFBP-3 were measured in twelve healthy regularly cycling volunteers and forty-two women with PCO then, the changes of baseline serum levels were evaluated after laparoscopic ovarian electrocauterization in nine PCO patients. In addition, the expression pattern of IGF-I and IGF-II was examined in the ovary of control and PCO group. RESULTS: Baseline levels of LH, ADD, free IGF-II, and IGFBP-3 were significantly higher in PCO group. However, there were no significant differences in the levels of free IGF-I and IGFBP-1, although free IGF-I showed decreasing tendency in PCO group. And there was a significant positive correlation between the LH and free IGF-II level in the PCO(P=0.011, r2=0.3899), but not in the control. After ovarian electrocauterization, LH, T, and ADD levels decreased, and free IGF-I and IGFBP-3 level increased. While free IGF-II and IGFBP-1 level showed no significant changes. In the ovary, expression of both IGFs showed similar pattern in normal and PCO ovaries. CONCLUSIONS: The elevated IGFBP-3 level may alter the bioavailability of IGF(s) in the PCO. The change in IGF-I level and resumption of ovulation after electrocauterization, suggest a possible role of IGF system in the impairment of follicular development in the PCO.
Androstenedione ; Biological Availability ; Carrier Proteins* ; Estradiol ; Female ; Follicle Stimulating Hormone ; Humans ; Hyperandrogenism ; Insulin-Like Growth Factor Binding Protein 1 ; Insulin-Like Growth Factor Binding Protein 3 ; Insulin-Like Growth Factor I ; Insulin-Like Growth Factor II ; Luteinizing Hormone ; Ovary* ; Ovulation ; Prolactin ; Somatomedins* ; Testosterone ; Thyrotropin ; Volunteers

BACKGROUND: The interest of medicine was moved from disease treatment to disease prevention and health promotion. Especially, there has been marked increased interest in health promotion recently. Perception and health behaviors held or acquired during medical training can influence the acceptance and prevention strategies. This exploratory study surveyed medical and non-medical student to assess both preventive health behaviors and perception, to find relations of personal behaviors and corresponding perception. METHODS: This survey were conducted 140 medical students and 131 non-medical students in one big city. Data were obtained by self-reported questionnaire. Weschler survey was adapted to assess perception toward preventive behavior, and Fantastic lifestyle was adapt,ed to assess health behavior. RESULTS: Among the questionnaire of perception of preventive behavior, quitting cigarette smoking ranked highest frequency as very important in medical student. In non-medical student, use seat-belt is ranked highest frequency. Mean score of FANTASTIC lifestyle is 29.98 in medical student, 28.86 in non-medical. The result show significant relationship between st,udent-reported behavior and corresponding perception in 6 qestionnaire that is eat breakfast, moderate or no alcohol use, eliminate smoking, use seat belt, limit coffee, get seven hours sleep. CONCLUSIONS: In comparing medical and non-medical students, health perception and health behavior were no significant difference. Overall, the result indicated that the preponderance of respondents that is engaging in health behaviors are high in health perception.
Breakfast ; Coffee ; Surveys and Questionnaires ; Health Behavior* ; Health Promotion ; Humans ; Life Style ; Seat Belts ; Smoke ; Smoking ; Students, Medical

The following is a retrospective study on the results of anterior spinal surgery with Kaneda II instrumentation and surgical Titanium MESH after thoracolumbar unstable spinal injuries. From July 1994 to June 1995, we operated on 14 patients at the Chosun University Kwang Yang hospital. Fourteen patients were followed for at least three months. Anterior spinal surgery was performed on the patients who had thoracolumbar unstable spine injuries. The procedure consisted of anterior decompression through corpectomy and stabilization with Kaneda II instrumentation and surgical Titanium MESH which was impacked with resected bone chip. Most of patients had demonstrated showed neurological improvement, relief of pain, immediate stabilization and early return to normal activities. Radiologic evaluation showed the correction of the fracture deformity with satisfactory outcome postoperatively.
Congenital Abnormalities ; Decompression* ; Humans ; Retrospective Studies ; Spinal Injuries ; Spine* ; Titanium*

The brain consists of heterogeneous populations of neuronal and non-neuronal cells. The revelation of their connections and interactions is fundamental to understanding normal brain functions as well as abnormal changes in pathological conditions. Optogenetics and chemogenetics have been developed to allow functional manipulations both in vitro and in vivo to examine causal relationships between cellular changes and functional outcomes. These techniques are based on genetically encoded effector molecules that respond exclusively to exogenous stimuli, such as a certain wavelength of light or a synthetic ligand. Activation of effector molecules provokes diverse intracellular changes, such as an influx or efflux of ions, depolarization or hyperpolarization of membranes, and activation of intracellular signaling cascades. Optogenetics and chemogenetics have been applied mainly to the study of neuronal circuits, but their use in studying non-neuronal cells has been gradually increasing. Here we introduce recent studies that have employed optogenetics and chemogenetics to reveal the function of astrocytes and gliotransmitters.
Astrocytes* ; Brain ; In Vitro Techniques ; Ions ; Membranes ; Neurons ; Optogenetics*

BACKGROUND: Chronic low back pain(CLBP) is one of the most common afflictions of humans. Between 70% and 80% of the population experience back pain some time during their lives. Especially, back pain is the most common cause of limited activity in individual under age 45. METHODS: The prepared questionnaire and SCL-MPD(symptom check list-minor psychiatric disorders) were presented to subjects who visited our hospital for occupational routine check. The questionnaire was composed of duration and severity of back pain. The subject were divided into two groups, respectively with chronic low back pain history and without history. The differences of psychogenic symptoms between both groups were analysed. RESULTS: In general characteristics, there was no significant difference between both groups. There were significant differences in somatization, anxiety, depression, anger-hostilily, phobic anxiety, neurasthenic, hypochondriacal, interpersonal sensitivity and general dimensions between both groups(P<0.05). There was no significant difference in obsessive-compulsive dimension between both groups. CONCLUSIONS: These results showed the presence of various psychogenic symptoms in chronic low back pain patients. Such psychosocial variables will need to receive additional careful attention in primary care setting.
Anxiety ; Back Pain ; Depression ; Humans ; Low Back Pain* ; Primary Health Care ; Surveys and Questionnaires

Four hundred and sixty five randomly selected clones from a cDNA library of Blattella germanica were partially sequenced and searched using BLAST as a means of analyzing the transcribed sequences of its genome. A total of 363 expressed sequence tags (ESTs) were generated from 465 clones after editing and trimming the vector and ambiguous sequences. About 42% (154/363) of these clones showed significant homology with other data base registered genes. These new B. germanica genes constituted a broad range of transcripts distributed among ribosomal proteins, energy metabolism, allergens, proteases, protease inhibitors, enzymes, translation, cell signaling pathways, and proteins of unknown function. Eighty clones were not well-matched by database searches, and these represent new B. germanica-specific ESTs. Some genes which drew our attention are discussed. The information obtained increases our understanding of the B. germanica genome.
Sequence Alignment ; Reverse Transcriptase Polymerase Chain Reaction ; Molecular Sequence Data ; Male ; Female ; *Expressed Sequence Tags ; Blattellidae/*genetics ; Base Sequence ; Animals

PURPOSE: Medical direction is an integral part of proper prehospital care, which is performed by EMS providers. In Gyunggi province, a number of measures have been implemented to improve the direct medical direction system. We aimed to report on the process and results of the newly implemented medical direction system. METHODS: This is a descriptive analysis of the newly implemented medical direction system for community EMS providers from June 2014 to October 2014. Direct medical direction was requested by emergency medical technicians (EMTs) during the study period, as follows: when a destination hospital was selected, EMTs requested medical direction from the physicians at the destination hospital. During the study period specially-trained advanced EMTs were permitted to perform intravenous (IV) access for fluid or glucose infusion without direct medical direction. EMTs were asked to complete records when they requested direct medical direction and performed IV access without medical direction. These records were collected and used in the analysis. RESULTS: Of 5949 direct medical direction requests, 5527 were analyzed; 2958 (53.5%) cases were requested to the destination hospitals, 2569 (46.5%) were requested to the centralized dispatch center. 'Patient evaluation' was the most common reason for EMTs to request medical direction to the destination hospitals (1680, 54.4%) and centralized dispatch center (980, 38.1%). EMTs' degree of satisfaction did not differ significantly between destination hospitals and the centralized dispatch center (4.12+/-0.82 and 4.09+/-0.84, p=0.053). IV access rate for hypotensive patients increased 6.1% during the study period compared to the same period of 2013 (17.6% and 11.5%, p<0.01). CONCLUSION: We found that it is feasible to request direct medical direction to the destination hospitals and perform IV access for fluid or glucose infusion without direct medical direction for specially-trained advanced EMTs. Continuing efforts to establish an optimized medical direction system would be required for proper pre-hospital care.
Emergency Medical Service Communication Systems ; Emergency Medical Services ; Emergency Medical Technicians ; Glucose ; Humans ; Korea

A nasal provocation test is the most reliable diagnostic test to confirm allergen in allergic rhinitis. However, there are neither specific objective methods nor a standardized method and interpretation. In 20 normal subjects and 86 allergic rhinitis patients, we applied acoustic rhinometry as a new objective method to assess changes in nasal patency induced by nasal allergen challenge, a procedure which is used for confirming allergic rhinitis. The result shows that a minimal cross-sectional area (MCA) and volume from the nose tip on back to 7 cm (nasal cavity volume) after allergen challenge were significantly decreased in allergic rhinitis patients in comparison with the control subjects. We conclude that acoustic rhinometry can provide a sensitive index for evaluating the results of a nasal provocation test.
Acoustics* ; Diagnostic Tests, Routine ; Humans ; Nasal Provocation Tests* ; Nose ; Rhinitis ; Rhinometry, Acoustic*

A clinical study was done on 16 cases of constrictive pericarditis admitted to National Medical Center, from january, 1970 to October, 1982, were reviewed, conclusion as follows: 1) The patients with constrictive pericarditis generally revealed clinical features of right heart failure but low incidence of its characteristic features. 2) Hemodynamic and echocardiographic examinations were much helpful in confirmation of clinical diagnosis. 3) pericardiectomy was highly succesful in achievement of clinical improvement.
Diagnosis ; Echocardiography ; Heart Failure ; Hemodynamics* ; Humans ; Incidence ; Pericardiectomy ; Pericarditis, Constrictive*