• Title/Summary/Keyword: WPW

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Two Cases of Wolff-Parkinson-White Syndrome in a Family (가족 내 발생을 보인 Wolff-Parkinson-White 증후군 2례)

  • Joo, Chan Uhng;Lim, So Hee;Hwang, Pyung Han
    • Clinical and Experimental Pediatrics
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    • v.45 no.9
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    • pp.1150-1154
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    • 2002
  • Wolff-Parkinson-White(WPW) syndrome is characterized by electrographic evidence of ventricular preexcitation, which predisposes to supraventicular arrhythmias. Familial occurrence of WPW syndrome is uncommon. We observed two affected siblings in a family. Five members of the family underwent 12-lead electrocardiography and echocardiography. Although known genetic abnormality of the 7q34-q36(PRKAG2) for the familial WPW syndrome was evaluated, the mutation was not detected in this family. Other unknown mutations responsible for this familial WPW syndrome were suggested.

Electrocardiographic and Echocardiographic Characterisitics of Wolff-Parkinson-White Syndrome in Preschool Children (학동전 아동에서 Wolff-Parkinson-White 증후군의 심전도 소견에 따른 유형 및 심초음파 소견)

  • Chu, Jeoung Min;Sim, Hyun Sup;Cho, Soo Chul;Joo, Chan Uhng
    • Clinical and Experimental Pediatrics
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    • v.45 no.9
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    • pp.1097-1105
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    • 2002
  • Purpose : This study was conducted to estabilish the prevalence, clinical features and relationship between ECG findings and echocardiographic findings of Wolff-Parkinsion-White(WPW) syndrome in asymptomatic preschool children. Methods : An electrocardiographic screening study was performed on 77,824 preschool children in Jeonbuk province from April, 1999 to August, 2001. Patients with WPW syndrome underwent echocardiographic study. Results : Twenty three patients with WPW syndrome were discovered by electrocardiographic screening of preschool children. The prevalence rate was 2.9 per 10,000 preschool children and there was no significant sexual difference. Two patients had a history of symptoms related to tachyarrythmia. According to the ECG classification of Rosenbaum et al., five patients were type A and 18 were type B. Utilizing the criteria of Gallagher et al, right anterior, 12 patients; right anteiror paraseptal, four patients; left anteiror, three patients. Nineteen of 23 patients underwent echocardiographic study. Four of five patients with type A WPW syndrome had abnormal early systolic anterior motion of left ventricular posterior wall. Twelve of 14 patients with type B had abnormal interventricular septal motion characterized by early sytolic posterior motion immediately after inscription of the delta wave. Conclusion : The prevalence rate of preschool children in Jeonbuk province was 2.9/10,000. By the classification according to the electrocardiographic findings, the accessory pathway location was dominant right side than left side. In the echocardiographic study, type A WPW syndrome showed abnormal left ventricular posterior wall motion and type B WPW showed abnormal interventricular septal motion.

Reconstruction of Myocardial Current Distribution Using Magnetocardiogram and its Clinical Use (심자도를 이용한 심근 전류분포 복원과 임상적 응용)

  • 권혁찬;정용석;이용호;김진목;김기웅;김기영;박기락;배장호
    • Journal of Biomedical Engineering Research
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    • v.24 no.5
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    • pp.459-464
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    • 2003
  • The source current distribution in a heart was reconstructed from the magnetocardiogram (MCG) and its clinical usefulness was demonstrated. MCG was measured using 40-channel superconducting quantum interference device (SQUID) gradiometers for a patient of Wolff-Parkinson-White (WPW) syndrome, which has an accessory pathway between the atria and the ventricles. Reconstruction of source current distribution in a plane below the chest surface was performed using minimum norm estimation (MNE) algorithm and truncated singular value decomposition (SVD), In the simulation, we confirmed that the current distributions. which were computed for the test dipoles, represented well the essential feature of the test current configurations, In the current map of WPW syndrome, we observed abnormal currents that would bypass the atrioventricular junction at a delta wave. However, we could not observe such currents any more after the surgery. These results showed that the obtained current distribution using MCG signals is consistent with the electrical activity in a heart and has clinical usefulness.

Application of 40-channel SQUID Gradiometer System for the Comparison of Magnetocardiograms from Healthy Subjects and Patients with WPW syndrome and DCM (40 채널 SQUID 미분계 시스템을 이용한 정상인과 WPW 증후군 및 확장성 심근증 환자의 심자도 비교)

  • 정용석;권혁찬;김기웅;이용호;강찬석;김진목;박용기;김기영;박기락
    • Progress in Superconductivity
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    • v.5 no.1
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    • pp.38-44
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    • 2003
  • The aim of this study is to confirm clinical usefulness of magnetocardiogram (MCG) by analyzing MCG data of health subjects and patients with Wolff-Parkinson-White (WPW) syndrome and dilated cardiomyopathy (DCM). Measurement of MCG signals was done with a home-made 40-channel SQUID system. MCG signals of 30 healthy subjects were measured as the reference of MCG signals. Among the DCM patients, 7 patients showed abnormal the direction of T wave vector. For a WPW syndrome patient, we measured the MCG signals before and after the surgery. and compared the difference. From the measured magnetic field distribution, current vector map was obtained to show the myocardium current activity. By comparing the MCG signals and current maps, we showed the differences in the analysis results between the healthy subjects and patients with heart diseases.

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Feature Ensemble-based Wolff Parkinson White Syndrome classification through ECG (ECG를 통한 Feature Ensemble 기반 Wolff Parkinson White 증후군 분류)

  • Gyutae Oh;Inki Kim;Beomjun Kim;Younghoon Jeon;Jeonghwan Gwak
    • Proceedings of the Korean Society of Computer Information Conference
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    • 2023.01a
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    • pp.169-171
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    • 2023
  • Wolff Parkinson White Syndrome(WPW)은 일반인과는 다르게 선천적으로 심방과 심실 사이에 부전도로(Accessory Pathway)가 존재하여 정상 전도와 비교하였을 때, 빠른 속도로 심실을 자극하여 부정맥을 일으키는 것을 의미한다. WPW는 부정맥이 주된 증상이기는 하나, 평소에는 무증상인 경우가 많고, 성인이 되어 갑작스럽게 발생하는 경우가 존재하기 때문에 인지하지 못하고 살아가는 환자들이 많다는 것이 특징이다. 이러한 특징은 갑작스러운 건강 악화가 타인의 생명에 악영향을 줄 수 있는 트럭 운전기사나 의사와 같은 직업군 등의 경우 WPW를 조기에 발견하고 치료해 위험을 사전에 방지하는 것이 매우 중요하다. 따라서, 본 논문에서는 Electrocardiogram(ECG) 데이터를 기반으로 WPW를 자동으로 분류하기 위한 Feature Ensemble 기반 심층 학습 프레임워크를 제안한다. 제안된 기법의 경우 단일 1D-CNN과 GRU를 이용한 기법 대비 F1-Score, Accuracy 기준의 성능 향상을 달성하였기에 본 Task에 적합함을 보여준다.

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Abnormal Perfusion on Myocardial Perfusion SPECT in Patients with Wolff-Parkinson-White Syndrome (Wolff-Parkinson-White 증후군 환자의 심근 관류 이상)

  • Kang, Do-Young;Cha, Kwang-Soo;Han, Seung-Ho;Park, Tae-Ho;Kim, Moo-Hyun;Kim, Young-Dae
    • The Korean Journal of Nuclear Medicine
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    • v.39 no.1
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    • pp.9-14
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    • 2005
  • Purpose: Abnormal myocardial perfusion may be caused by ventricular preexcitation, but its location, extent, severity and correlation with accessory pathway (AP) are not established. We evaluated perfusion patterns on myocardial perfusion SPECT and location of AP in patients with WPW (Wolff-Parkinson-White) syndrome. Materials and Methods: Adenosine Tc-99m MIBI or Tl-201 myocardial perfusion SPECT was performed in 11 patients with WPW syndrome. Perfusion defects (PD) were compared to AP location based on ECG with Fitzpatrick's algorithm or electrophysiologic study and radiofrequency catheter ablation. Results: Patients had atypical chest discomfort or no symptom. Risk of coronary artery disease (CAD) was below 0.1 in 11 patients using the nomogram to estimate the probability of CAD. Coronary angiography was performed in 4 patients (mid-LAD 50% in one, normal in others). In 4 patients, AP localization was done by electrophysiologic study and radiofrequency catheter ablation (RFCA). Small to large extent ($11.0{\pm}8.5%$, range:$3{\sim}35%$) and mild to moderate severity ($-71{\pm}42.7%$, range:$-2l7{\sim}-39%$) of reversible (n=9) or fixed (n=1) perfusion defects were noted. One patient with right free wall (right lateral) AP showed normal. PD locations were variable following the location of AP. One patient with left lateral wall AP was followed 6 weeks after RFCA and showed significantly decreased PD on SPECT with successful ablation. Conclusion: Myocardial perfusion defect showed variable extent, severity and location in patients with WPW syndrome. Abnormal perfusion defect showed in most of all patients, but it did not seem to be correlated specifically with location of accessory pathway and coronary artery disease. Therefore myocardial perfusion SPECT should be interpreted carefully in patients with WPW syndrome.

Wolff-Parkinson-White syndrome in young people, from childhood to young adulthood: relationships between age and clinical and electrophysiological findings

  • Jung, Hae-Jung;Ju, Hwang-Young;Hyun, Myung-Chul;Lee, Sang-Bum;Kim, Yeo-Hyang
    • Clinical and Experimental Pediatrics
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    • v.54 no.12
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    • pp.507-511
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    • 2011
  • Purpose: The aim of the present study was to evaluate the characteristics of electrophysiologic studies (EPS) and radiofrequency ablation (RFA) performed in subjects aged less than 30 years with Wolff-Parkinson-White (WPW) syndrome, particularly pediatric patients under 18 years of age, based on our experience. Methods: Two hundred and one consecutive patients with WPW syndrome were recruited and divided to 3 groups according to age: group 1, 6 to 17 years; group 2, 18 to 29 years; and group 3, 30 to 60 years. The clinical, electrophysiological, and therapeutic data for these patients were evaluated by a retrospective medical record review. Results: A total of 73 (36%) of these patients were <30 years of age. Although there were more males than females in group 2 (male:female, 31:11), there was no sex difference in group 1 (male:female, 16:15). Left accessory pathway was detected less frequently in group 1 (32%, 10/31) than in group 2 (57%, 24/42) and group 3 (63%, 81/128) (P=0.023 and P=0.002, respectively). Conclusion: The present study describes several different electrophysiological characteristics in children and adolescents with WPW syndrome. Therefore, when EPS and RFA are performed in children and adolescence with WPW syndrome, we recommend that these characteristics be considered.

Depression masquerading as chest pain in a patient with Wolff Parkinson White syndrome

  • Madabushi, Rajashree;Agarwal, Anil;Tewari, Saipriya;Gautam, Sujeet KS;Khuba, Sandeep
    • The Korean Journal of Pain
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    • v.29 no.4
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    • pp.262-265
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    • 2016
  • Wolff Parkinson White (WPW) syndrome is a condition in which there is an aberrant conduction pathway between the atria and ventricles, resulting in tachycardia. A 42-year-old patient, who was treated for WPW syndrome previously, presented with chronic somatic pain. With her cardiac condition in mind, she was thoroughly worked up for a recurrence of disease. As part of routine screening of all patients at our pain clinic, she was found to have severe depression as per the Patient Health Questionnaire-9 (PHQ-9) criteria. After ruling out sinister causes, she was treated for depression using oral Duloxetine and counselling. This led to resolution of symptoms, and improved her mood and functional capability. This case highlights the use of psychological screening tools and diligent examination in scenarios as confusing as the one presented here. Addressing the psychological aspects of pain and adopting a holistic approach are as important as treatment of the primary pathology.

Kernel Pattern Recognition using K-means Clustering Method (K-평균 군집방법을 이요한 가중커널분류기)

  • 백장선;심정욱
    • The Korean Journal of Applied Statistics
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    • v.13 no.2
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    • pp.447-455
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    • 2000
  • We propose a weighted kernel pattern recognition method using the K -means clustering algorithm to reduce computation and storage required for the full kernel classifier. This technique finds a set of reference vectors and weights which are used to approximate the kernel classifier. Since the hierarchical clustering method implemented in the 'Weighted Parzen Window (WP\V) classifier is not able to rearrange the proper clusters, we adopt the K -means algorithm to find reference vectors and weights from the more properly rearranged clusters \Ve find that the proposed method outperforms the \VP\V method for the repre~entativeness of the reference vectors and the data reduction.

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Surgical Treatment of Wolff-Parkinson-White Syndrome Combined with AV Nodal Reentrant achycardia in a Patient with Ebstein`s Anomaly - A report of one case - (Ebstein씨 심기형에 동반된 Wolff-Parkinson-White 증후군 및 방실결절 회귀성 빈맥에 대한 수술치험 1례 보고)

  • 장병철
    • Journal of Chest Surgery
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    • v.23 no.1
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    • pp.205-212
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    • 1990
  • A 17 year old female patient with Ebstein`s anomaly received surgical treatment for WPW syndrome and AV nodal reentrant supraventricular tachycardia[SVT] Electrophysiologic study revealed that an anomalous pathway was located in the right posterolateral portion and antegrade dual AV nodal pathway responsible for AV nodal reentrant tachycardia. The patient was underwent surgery on February 18, 1987. Intraoperative mapping was used to define the location of accessory pathway. The accessory pathway was cryoablated through the epicardium. Simultaneously discrete cryoablation around the perinodal area was performed to prevent AV nodal reentrant SVT. The atrialized right ventricle of Ebstein`s anomaly was plicated with 11 pledget mattress sutures under the cardiopulmonary bypass. Two and half years after surgery, the patient has no evidence of WPW syndrome or supraventricular tachycardia.

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