• 제목/요약/키워드: left factor

검색결과 569건 처리시간 0.033초

승모판 수술환자에 있어서 심방세동과 색전증에 영향을 주는 요소 (Factors Influencing Atrial Fibrillation & Embolization in Mitral Valve Surgery)

  • 조광조;김종원;정황규
    • Journal of Chest Surgery
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    • 제25권12호
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    • pp.1404-1415
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    • 1992
  • To understand the factors influencing Atrial fibrillation and embolism in mitral valve surgery and prevent their risk, we have reviewed our 324 patients who underwent mitral valve surgery from Fev. 1982 to May 1992. Age, disease duration, lesion type, left ventricular function and left atrial dimension were chosen as preoperative factors influencing the incidence of atrial fibrillation and embolism and their postoperative course, The number and type of replaced valve, site of atriotmy, LA obliteration, ACT and use of Defibrillator were chaser. as operative factors influencing postoperative rhythm change and postop emb-olization. The results of analyses were as follows 1. The incidence of preoperative atrial fibrillation, systemic embolism and LA throbmus was 63. 6%, 10.56% and 19.8% relatively. 2. The preoperative factors of atrial fibrillation onset was old age, prolonged symptom duration, stenotic lesion, lager LAD and lower ejection fraction. In the preoperative systemic embolism preoperative factors were old age, female, stenotic lesion. The left atrial thrombus found more commonly in patients with atrial fibrillation, old age, prolonged symptom duration, stenotic lesion and low ejection fraction. 3. The preoperative atrial fibriation persisted postoperatively in 165[50.9%] and converted to normal sinus rhythm in 50[15.4%]. The preoperative normal sinus rhythm per-eisted in 100[31%] and atrial fibrillation was occured postoperatively in 9[2.7%]. The prolonged symptom duration was the preoperative factor of persist atrial fibrillation. 4. Among 95 long term follow-up patients, atiral fibrillation was continued in 59[60%]. Conversion to normal sinus rhythm was more common significantly in left atriotomy and bileaflet valve replacement. 5. There were 12 patients who had postoperative embolism. Female, persist atrial fibrillation, no LA olbiteration and tilting disc monocusp valve were considered as possible factors influencing postoperative embolism but was impossible to analyse their statistical significance due to small sample size. So we have concluded that the patients with above risk factors need anticoagulant and early surgical intervention. Left atriotomy with minimal atrial injury, left auricular obliteration and bileaflet valve replacement may be needed to reduce postoperative atrial fibrillation persist and embolism.

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중국 조선족 유수아동의 내재화 문제행동에 관한 구조모형 (A Structural Equation Modeling of Internalizing Problem Behaviors of Korean Chinese'left-behind'Children in China)

  • 현미나;박지선;신동면
    • 한국사회정책
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    • 제24권1호
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    • pp.153-185
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    • 2017
  • 본 연구는 부모들이 외지에 있는 중국 조선족 유수아동들의 문제행동 예방을 위한 지원체계 방안을 제시하고자 중국 조선족 유수아동의 문제행동 실태와 원인을 규명하는데 목적이 있다. 이를 위해 중국 조선족 집거지인 연변 3개 지역 학교에서 유수아동과 비유수아동 399명을 대상으로 설문조사를 실시하였다. 설문내용은 응답자의 일반적 특성, 내재화문제행동, 사회적지지, 자아존중감, 자아탄력성으로 구성하였다. 분석방법은 첫째, 문제행동 실태를 살펴보기 위해 유수아동집단과 비유수아동 집단의 주요변수에 대한 차이검증을 실시하였고, 둘째, 유수아동의 문제행동 원인을 살펴보기 위해 문제행동, 자아존중감, 자아탄력성, 사회적지지 간 구조적 인과관계와 직간접효과를 구조방정식모델을 사용하여 검증하였다. 분석결과는 다음과 같다. 첫째, 유수아동 집단은 비유수아동 집단과 비교하여 내재화 문제행동의 사회적 위축과 우울에서 그리고 외현화 문제행동의 비행에서 통계적으로 유의미한 차이를 보였는데, 양부모 부재 유수아동 집단 > 한부모 부재 유수아동 집단 > 비유수아동 집단 순으로 문제행동의 평균값이 높게 나타났다. 둘째, 유수아동 집단은 비유수아동 집단과 비교하여 자아탄력성과 사회적 지지에서 통계적으로 유의미한 차이를 보이지 않았으나, 자아존중감에서 유의미한 차이를 나타냈다. 자아존중감의 긍정적 요인에서 비유수아동 집단 = 한부모 부재 유수아동 집단 > 양부모 부재 유수아동 집단 순으로 높은 점수를 보였고, 부정적 요인에서는 양부모 부재 유수아동 집단 > 한부모 부재 유수아동 집단 > 비유수아동 집단 순으로 높은 점수를 보였다. 셋째, 유수아동 집단에 대한 사회적 지지는 내재화 문제행동에 통계적으로 유의미한 직접적인 부(-)의 영향을 미치며, 동시에 자아탄력성을 통해 내재화 문제행동에 간접적인 부(-)의 영향을 미치는 것으로 나타났다. 이러한 결과는 유수아동의 문제행동 완화 및 예방을 위한 사회적지지 체계 확립의 필요성과 자아탄력성을 높일 수 있는 방안 마련의 필요성을 시사하고 있다. 연구결과를 바탕으로 유수아동의 문제행동을 완화시키기 위한 중국의 사회적지지체계 방안 등을 논의하였다.

부분방실중격결손증에 대한 외과적 교정의 장기 결과 (Long-term Results of Surgical Correction for Partial Atrioventricular Septal Defects -Seventeen-year Experience -)

  • 이정렬;박천수;임홍국;김용진;노준량;배은정;노정일;윤용수
    • Journal of Chest Surgery
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    • 제36권12호
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    • pp.911-920
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    • 2003
  • 본 연구에서 지난 17년간 경험한 부분방실중격결손증의 외과적 교정술의 장기결과를 후향적으로 분석하였다. 대상 및 방법: 1986년 4월부터 2002년 12월까지 부분방실중격결손증으로 외과적 교정술을 시행 받은 93명의 환자를 대상으로 사망률, 생존율 및 그 위험인자를 분석하고, 추적관찰 기간중 재수술과 관련되는 위험인자를 분석하였다. 남자 환자가 32명 여자 환자가 61명이었으며, 수술 당시 연령의 중앙값은 68개월(3∼818개월)이었고 평균추적관찰기간은 108$\pm$59.4개월(1∼200개월)이었다. 결과: 조기사망은 4예로 수술 사망률은 4.3%였다. 사망원인은 발작성 폐동맥고혈압증 1예, 저심박출증 1예, 심부전에 의한 심폐기이탈실패 1예, 심실세동 1예였고, 사망과 관련하여 통계적으로 의미 있는 인자는 없었다. 조기사망한 환자 4명을 제외한 89명의 환자를 추적 관찰하였고, 1예에서 만기사망을 확인하였다. 3년, 5년, 10년, 15년 생존율은 각각 95.7%, 94.3%, 94.3%, 94.3%였다. 수술 직후 63명(67.7%)의 환자에서 좌측 방실판막폐쇄부전이 개선되었고, 14명(15.1%)의 환자에서는 술 전과 같았고, 12명(12.9%)에서는 악화되었다. 추적관찰 기간 중 8명(9.0%)의 환자에서 재수술을 시행하였으며, 완전 교정술 후 평균 38.6개월(3∼136개월) 후 시행되었다. 3년, 5년, 10년, 15년 무재수술 생존율은 각각 94.0%, 91.4%, 91.4%, 88.2%였다. 재수술의 원인으로는 좌측 방실판막페쇄부전이 7예, 좌심실유출로협착이 2예, 잔존심방중격결손 1예, 좌측 방실판막협착 1예, 우심부전 1예였고, 재수술과 관련하여 좌심실 유출로 협착이 통계적으로 의미있는 위험인자였다(p=0.002). 10명의 환자에서 술 후 부정맥이 발생하였는데, 3명의 환자에서 상심실성 부정맥, 7명의 환자에서는 완전 방실전도차단이 발생하였고, 이 중 6명의 환자에서 영구 인공심박조율기의 삽입이 필요하였다. 걸론: 부분방실중격결손증은 낮은 사망률로 수술을 시행할 수 있었다. 재수술의 원인은 좌측 방실판막페쇄부전이 가장 많았다. 방실판막구조물의 기형이 동반된 경우 재수술의 가능성이 높아지는 경향을 보였으나 통계적 의미는 없었다. 또한, 술후 좌심실유출로협착여부가 재수술의 위험인자였으므로 좌측 방실판막 및 좌심실 유출로의 해부학적인 구조에 대한 정확한 이해가 요구된다. 좌심실유출로협착은 발생시 대동맥하부의 조직에 대한 절제술을 시행할 수 있으나 재발 가능성이 크고, 필요시 수정 Konno수술로 만족할만한 결과를 얻을 수 있었다. 또한, 방실전도차단은 초기시행단계에서 많이 발생하였으며, 심장 전도계에 대한 정확한 해부학적 이해와 경험축적으로 극복할 수 있었다.

광역계통의 실시간해석을 위한 고속 저주파수 파라미터 추정 (Fast Estimation of Low Frequency Parameter for Real-Time Analysis in Wide Area Systems)

  • 김은주;심관식;김용구;김의선;남해곤;임영철
    • 전기학회논문지
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    • 제58권6호
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    • pp.1078-1086
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    • 2009
  • This paper presents a Fourier based algorithm for estimating the parameters of the low frequency oscillating modes. The proposed methods estimates various parameters(frequency, damping factor, mode magnitude, phase) by fitting Fourier spectrum and phase with a damped exponential cosine function. Dominant frequency is selected by taking frequency corresponding to the peak spectrum, and damping factor is estimated using the left/right spectra of Fourier spectrum. In addition, mode magnitude is calculated by the normalized peak spectrum, and phase is estimated from spectrum phase. Also, we introduce an accuracy index in order to determine the accuracy of the estimated parameters, and the index is calculated using the deviations of the peak spectrum and the left/right spectra. The parameter estimation methods proposed in this paper include very simple arithmetical processes, so the algorithms are simple and the calculation speed is very fast. The proposed methods are applied to test functions with two dominant modes. The results show that the proposed methods are highly applicable to low frequency parameter estimation.

좌섬요통 환자의 12경맥 전위측정 연구 (Differences in electric potential of meridian system -Comparing electrical potentials of patients with Lumbago due to strain and contusion-)

  • 최환수;남봉현
    • Journal of Acupuncture Research
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    • 제21권5호
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    • pp.101-111
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    • 2004
  • Objective : Assuming that the characteristic of meridian system has been similar to this of electric potentials in human body and that measurements of electric potential at well(井穴) and sea (合穴) points in branches of the twelve meridians(WSBTM) will be representative of measurements of the twelve meridians, to measure the electric potentials of 13 patients with Lumbago due to strain and contusion(좌섬요통<挫閃腰痛>, LSC), to find out the characteristic of meridian system in patients with LSC. Methods : Electric potentials of well and sea points in the meridians in twenty one patients with the pain in the lion diagnosed as LSC were repeatedly measured by physiograph(PowerLab). Measurements of those electrical potentials were analyzed by factor analysis. Results : The electric potentials of WSBTM at the left side were divided into four factors. On the other hand those at the right side Were divided into four factors. Conclusion : In conclusion, their electrical potentials at the left and right side were factors which are different from each side. Thus electrical potentials of well and sea points might be the representative meridian to show their characteristics.

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신허요통 환자의 12 경맥 전위측정 연구 (Differences in electric potential of meridian system -Comparing electrical potentials of patients with Lumbago due to the kidney deficiency-)

  • 남봉현;최환수
    • 한국한의학연구원논문집
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    • 제9권1호
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    • pp.103-111
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    • 2003
  • Objectives : Assuming that the characteristic of meridian system has been similar to this of electric potentials in human body and that measurements of electric potential at well(井穴) and sea(合穴) points in branches of the twelve meridians(WSBTM) will be representative of measurements of the twelve meridians, to measure the electric potentials of 16 patients with Lumbago due to the kidney deficiency(腎虛腰痛, LKD), to find out the characteristic of meridian system in patients with LKD. Methods : Electric potentials of welt and sea points in the meridians in twenty one patients with the pain in the lion diagnosed as LKD were repeatedly measured by physiograph(PowerLab). Measurements of those electrical potentials were analyzed by factor analysis. Results : The electric potentials of WSBTM at the left side were divided into five factors. On the other hand those at the right side Were divided into t1vee factors. Conclusions : In conclusion, their electrical potentials at the left and right side were four different factors search side. Thus electrical potentials of welt and sea points might be the representative meridian to show their characteristics.

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구안와사 환자의 12경맥 전위측정 연구 (Differences in Electric Potential of Meridian System -Comparing Electrical Potentials of Patients with Facial Hemiparalysis-)

  • 최환수;남봉현
    • Journal of Acupuncture Research
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    • 제21권6호
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    • pp.111-120
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    • 2004
  • Objective : Assuming that the characteristic of meridian system has been similar to this of electric potentials in human body and that measurements of electric potential at well(井穴) and sea (合穴) points in branches of the twelve meridians(WSBTM) will be representative of measurements of the twelve meridians, to measure the electric potentials of 13 patients with Facial Hemiparalysis (구안와사<口眼蝸斜>, FH), to find out the characteristic of meridian system in patients with AK. Methods : Electric potentials of well and sea points in the meridians in twenty one patients with the pain in the lion diagnosed as FH were repeatedly measured by physiograph(PowerLab). Measurements of those electrical potentials were analyzed by factor analysis. Results : The electric potentials of WSBTM at the left side were divided into five factors. On the other hand those at the right side Were divided into four factors. Conclusions : In conclusion, their electrical potentials at the left and right side were each other five and four factors. Thus electrical potentials of well and sea points might be the representative meridian to show their characteristics.

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12경맥 전위측정 실험에 대한 연구(3) -부정맥 환자의 측정전위 비교- (Differences in Electric Potential of Meridian System(3) - Analysis of Electrical Potentials in Arrhythmic Patients -)

  • 남봉현;최환수
    • Journal of Acupuncture Research
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    • 제17권4호
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    • pp.172-179
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    • 2000
  • Objectives : Assuming that the characteristic of meridian system has been similar to this of electric potentials in human body and that measurements of electric potential at well(井穴) and sea(合穴) points in branches of the twelve meridians will be representative of measurements of the twelve meridians, to measure the electric potentials in three patient groups with arrhythmia(AP group), with arrhythmia and cerebral infarction(CI group), and with arrhythmia and hemorrhage(CH group), and then to find out the characteristic of meridian system among 3 groups. Methods : Thirty arrhythmic patients diagnosed by EKG, CT, and deficiency of the heart blood(心血虛症) were divided into 3 groups(AP, CI, CH group). Their electric potential of well and sea points in the meridians were measured 3 times by physiograph. Results : Measurements were analyzed by statistical factor analysis, we obtained that the left side electric potential of well and sea points in branches of the twelves meridians in AP group was divided into two factors, which were the hand meridian without the lung meridian, the foot meridian and the lung meridian, but the right side electric potential was divided into the hand and the foot meridian. In CH group both the left and the right side electric potential was divided into three factors. In CI group the left side electric potential was divided into three factors, but the right side electric potential was divided into two factors. Conclusions : In conclusion, their electrical potentials were different each other among 3 groups. Thus electrical potentials of well and sea points might be the representative meridian to show their characteristics.

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하악의 비틀림회전운동에 영향을 미치는 요인 (Factor Affecting Mandibular Rotational Troque Movements)

  • 이유미;한경수;허문일
    • Journal of Oral Medicine and Pain
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    • 제23권2호
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    • pp.143-155
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    • 1998
  • This study was performed to investigate the factor that might affect mandibualr body rotation. For the study, 115 patients with temporomandibular disorders and 35 dental students without angy signs and symptoms of temporomandibular disorders were randomly selected as the patient group and the contreol group, respectively. Preferred chewing side, Angle' classification, lateral guidance pattern, and affected side were clinically recorded, and the amount of Mandibular body rotational torque movement was measured in wide opening and closure, in right and left excursion with vertical and lateral distance in frontal plane, right and left rotational angel in horizontal and in frontal plane. Masticatory muscle activity of anteriorocclusal contact pattern on maximal hard biting were also observed synchronously with BioEMG and T-Scan , respectively. The observed items were muscle activity of anterior temporalis and superficial masseter, and tooth contact status related to contact number, force, duration, and occlusal unbalance between right and left arch. The data collected were analyzed by SAS statistical program. The results of this study were as follows : 1. Mean value of vertical distance in frontal plane in wide opening and closure was more in control subjects than in patients, but there was no difference for rotational angle. In right excursion, rotational angles were greater in patient group than in control group. 2. Comparison among the subjects by preferred chewing side did not reveal any significant difference, but comparison among patients by affected side showed more rotational amount in bilaterally affected patients than in unilaterally affected patients. 3. Comparison among the subjects by Angle's classification or lateral guidance pattern revealed no difference. There was also no difference between preferred chewing side and contralateral side, and between affected side and contralateral side. 4. Positive correlation in madibular rotational torque movements were observed among vertical distance, total horizontal rotation angle, electromyographic activity of anterior temporalis, tooth contact number, and tooth contact force but total frontal rotation angle almost did not show any correlation with other variables except vertical distance.

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서킷 웨이트트레이닝이 노인들의 등속성 근력과 신체구성에 미치는 영향 (Effects of Circuit Weight Training on Isokinetic Muscle Strength and Body Composition in elderly)

  • 장정훈;정동혁
    • The Journal of Korean Physical Therapy
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    • 제15권2호
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    • pp.168-181
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    • 2003
  • The purpose of this study was to investigate the effects of circuit weight training(CWT) on isokinetic muscle strength and body composition in elderly. The subjects who engaged in this experiment exercised at 40$\%$ of 1-RM, 12 repetitions, followed by 15 sec as the subject moved to the each break training program which was consist of the circuit of 10 stations performed on 3 set a day, circuits 3 days a week during 10 weeks. The assessment of isokinetic factor was in concentric flexors and extensors of right and left knee joint. Tests were performed on the Cybex 770 Isokinetic Dynamometer and body composition were estimated the three parts of chest, abdomen and anterior thigh by using skinfold caliper, calculated the average and followed by Seri and Brozek way. Statistical analysis were performed using analysis of variance paired t-test, accepting level for all significant was above $\alpha$=.05 and $\alpha$=.01. Following is as a result of 10 weeks circuit weight training. 1. At the $60_{\circ}$ /sec, the right and left knee isokinetic concentric flexors and extensors peak torque increased significantly (p < .01). 2. At the $180_{\circ}$ /sec, the right and left knee isokinetic concentric flexors and extensors peak torque increased significantly (p < .01). 3. At the $60_{\circ}$ /sec, the right and left knee isokenetic concentric flexors and extensors average power increased significantly(p < 0.5, p < .01) and at the $180_{\circ}$ /sec, the right extensors didn't show any statistical significant. 4. At the $60_{\circ}$ /sec, the right and left knee Isokinetic concentric flexors and extensors total work increased significantly(p < .05, p < .01) but at the $180_{\circ}$ /su right concentric flexors didn't show any statistical significant. 5. The body composition changed significantly(p < .01). These results suggest that 10 weeks circuit weight training increases the peak torque, average power, total work significantly and decreases the $\%$body fat significantly.

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