• Title, Summary, Keyword: Arrhythmia

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심장 부정맥을 동반한 하악 전돌증 환자의 술전준비와 악교정수술

  • Yu, Jeong-Taek;Kim, Cheol;Song, Seon-Heon
    • The journal of the Korean dental association
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    • v.40 no.9
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    • pp.703-708
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    • 2002
  • Cardiac arrhythmia is irregular heart rate. It's one of the reason of unpredictable sudden death. Accurate diagnosis and management of cardiac arrhythmia are the most important factors for the life of patient. To obtain a good prognosis, Dentist should be know and manage the multi-types of cardiac arrhythmia during dental treatment with the cooperation of medical doctor majored in cardiac circulation medicine. We casually found the cardiac arrhythmia in mandible prognathism patient during preparation for orthognathic surgery. Orthognathic surgery for cardiac arrhythmia patient was done successfully under general anesthesia with the temporary cardiac pace-maker.

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A Study on Reperfusion Arrhythmia II. Relationship between Occlusive Arrhythmia and Reperfusion Arrhythmia (Reperfusion Arrhythmia에 관한 연구 II. 폐색성 부정맥과 Reperfusion Arrhythmia와의 관계)

  • Choi In-Hyuk
    • Journal of Veterinary Clinics
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    • v.6 no.2
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    • pp.281-290
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    • 1989
  • To gain insight into the relationship between the occurrence of occlusive arrhythmia(OA) and the incidence of reperfusion arrhythmia(RA), this study used 25 open-chest dogs anesthetized with halothan, these were ligated between anterior ventricular branch and marginal branch of left circumflex artery for 30 minutes and occlusive arrhythmia were observed during the ligation. After releasing of the ligation, TA were observed during 5 minutes. The results were summerized as follow; 1. Such arrhythmias as ventricular fibrillation(VF), short run type VPC Premature contraction(VPC), Venticular tachycardia(VT), ventricularc and trigeminy VPC(TVPC) were observed during occlusion and reperfusion. 2. The cases occurred VT, SRVPC and TVPC during occlusion necessarily were Incidence of RA. 3. RA never occurred without appearence of occlusive arrhythmias. 4. The occurrence rate of OA showed 55.5% in the incidence group of RA and 24.6% in the non incidence group of RA. 5. The occurrence rate of VPC during occlusion showed 9.9+5.85(episode/min) in the incidence group of RA and 4.46+5.88(episode/min) in the non-incidence group of RA. These results may be estimated that the occurrence of VT, SRVPC and TVPC, and the high occurrence rate of VPC during occlusion can be predicted the incidence.

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Detection of Arrhythmia Using Heart Rate Variability and A Fuzzy Neural Network (심박수 변이도와 퍼지 신경망을 이용한 부정맥 추출)

  • Jang, Hyoung-Jong;Lim, Joon-Shik
    • Journal of Internet Computing and Services
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    • v.10 no.5
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    • pp.107-116
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    • 2009
  • This paper presents an approach to detect arrhythmia using heart rate variability and a fuzzy neural network. The proposed algorithm diagnoses arrhythmia using 32 RR-intervals that are 25 seconds on average. We extract six statistical values from the 32 RR-intervals, which are used to input data of the fuzzy neural network. This paper uses the neural network with weighted fuzzy membership functions(NEWFM) to diagnose arrhythmia. The NEWFM used in this algorithm classifies normal and arrhythmia. The performances by Tsipouras using the 48 records of the MIT-BIH arrhythmia database was below 80% of SE(sensitivity) and SP(specificity) in both. The detection algorithm of arrhythmia shows 88.75% of SE, 82.28% of SP, and 86.31% of accuracy.

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Postoperative Life-Threatening Recurrent Ventricular Arrhythmia Triggered by the Swan-Ganz Catheter in a Patient Undergoing Off-Pump Coronary Artery Bypass Surgery

  • Min, Jooncheol;Choi, Jae-Sung;Oh, Se Jin;Seong, Yong Won;Moon, Hyun Jong;Lee, Jeong Sang
    • The Korean Journal of Thoracic and Cardiovascular Surgery
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    • v.47 no.4
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    • pp.416-419
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    • 2014
  • Recurrent ventricular arrhythmia can be fatal and cause serious complications, particularly when it is caused immediately after an operation. Incorrect placement of a Swan-Ganz catheter can trigger life-threatening ventricular arrhythmia, but even intensive care specialists tend to miss this fact. Here, we report a case of recurrent ventricular arrhythmia causing a severe hemodynamic compromise; the arrhythmia was induced by a severely angulated Swan-Ganz catheter. The recurrent ventricular arrhythmia was not controlled by any measures including repositioning of the catheter, until the complete removal of the Swan-Ganz catheter. It is necessary to keep in mind that the position of the pulmonary artery catheter should be promptly checked if there is intractable recurrent ventricular arrhythmia.

A Case of ECT-induced Arrhythmia(PVC) (전기경련요법에 의하여 유발된 심부정맥(PVC) 1례)

  • Kim, Duk-Ho;Lee, Ho-Taek;Paik, Ju-Hee;Lee, Sang-Yeon
    • Korean Journal of Psychosomatic Medicine
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    • v.5 no.2
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    • pp.214-217
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    • 1997
  • Electroconvulsive therapy(ECT) is one of the most effective treatment modalities for the treatment of depression, mania, schizophrenia, or other neuropsychiatric disorders. But, reportedly ECT also can produce various forms of cardiac arrhythmia. We experienced a case of ECT-induced arrhythmia(PVC) accompanied with chest pain in a schizophrenic patient during the course of plain ECT. We conclude that there is a possible causal relationship between ECT and cardiac arrhythmia(PVC). The mechanisms of cardiac arrhythmia(PVC) due to ECT may be explained by the effects of ECT to vagal and sympathetic nervous systems. from this case report, We suggest that careful cardiac monitoring before, during, and after ECT with appropriate anesthetic preparation to a patient may enable to minimize the cardiovascular side effects of ECT in the patients with neuropsychiatric disorders.

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Numerical analysis of the ventricular fibrillation phenomena using two-dimensional Tissue Model (2차원 조직모델을 사용한 심실세동 현상의 수치적 해석)

  • Choi, Seung-Yun;Hong, Seung-Bae;Lim, Ki-Moo;Shim, Eun-Bo
    • Proceedings of the KSME Conference
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    • pp.1665-1668
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    • 2008
  • Arrhythmia causes sudden cardiac death. In the past, there were medical limitations in finding the cause of arrhythmia. As an alternative solution for research of arrhythmia, there have been studies to find the causes of arrhythmia by producing a virtual heart model. Medically, arrhythmia has two main causes: abnormal occurrence of action potential and abnormal conduction of action potential. Based on these, the tachycardia, which is one of the arrhythmia, was manifested and the phenomenon of ventricular fibrillation was numerically analyzed in this study. For this purpose, an electrophysiological model of ventricular cells was implemented, which was subsequently applied to the reaction-diffusion partial differential equation to interpret the macroscopic conduction phenomenon in two-dimensional tissues. The ventricular fibrillation refers to a condition where several irregular waves occur in cardiac tissue, whose generation mechanism is pathologically related to the cardiac tissue.

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Detection Algorithm of Cardiac Arrhythmia in ECG Signal using R-R Interval (심전도신호의 R-R 간격을 이용한 부정맥 구간 검출 알고리즘)

  • Kim, Kyung Ho;Lee, Sang Woon;Kim, Jin Young
    • Journal of Satellite, Information and Communications
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    • v.9 no.1
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    • pp.85-89
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    • 2014
  • Electrocardiogram (ECG) is a diagnostic test which records the electrical activity of the heart, shows abnormal rhythms and detects heart muscle damages. With this ECG signal, medical centers diagnose patients' heart disease symptoms. A normal resting heart rate for adults rages from 60 to 100 beats a minute. An irregular heartbeat is called "arrhythmia", and arrhythmia is also called "cardiac dysrhythmia". In an arrhythmia, the heartbeat maybe too slow(slower than 60beats), too rapid(faster than 100beats), too irregular, etc. Among these symptoms of arrhythmia, if the heart beat is slower than the normal range, the symptom is called "bradycardia", and if it is faster than the range, it is called "tachycardia" In this letters, we proposed the detection algorithm of cardiac arrhythmia in ECG signal using R-R interval through the detection of R-peak.

R Wave Detection Considering Complexity and Arrhythmia Classification based on Binary Coding in Healthcare Environments (헬스케어 환경에서 복잡도를 고려한 R파 검출과 이진 부호화 기반의 부정맥 분류방법)

  • Cho, Iksung;Yoon, Jungoh
    • Journal of the Korea Society of Digital Industry and Information Management
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    • v.12 no.4
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    • pp.33-40
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    • 2016
  • Previous works for detecting arrhythmia have mostly used nonlinear method to increase classification accuracy. Most methods require accurate detection of ECG signal, higher computational cost and larger processing time. But it is difficult to analyze the ECG signal because of various noise types. Also in the healthcare system based IOT that must continuously monitor people's situation, it is necessary to process ECG signal in realtime. Therefore it is necessary to design efficient algorithm that classifies different arrhythmia in realtime and decreases computational cost by extrating minimal feature. In this paper, we propose R wave detection considering complexity and arrhythmia classification based on binary coding. For this purpose, we detected R wave through SOM and then RR interval from noise-free ECG signal through the preprocessing method. Also, we classified arrhythmia in realtime by converting threshold variability of feature to binary code. R wave detection and PVC, PAC, Normal classification is evaluated by using 39 record of MIT-BIH arrhythmia database. The achieved scores indicate the average of 99.41%, 97.18%, 94.14%, 99.83% in R wave, PVC, PAC, Normal.

Postoperative Arrhythmia after Open Heart Surgery - Cause, Incidence and It`s Management - (개심수술후 심장부정맥에 대한 임상적 연구: 원인,빈도 및 치료)

  • 장병철
    • The Korean Journal of Thoracic and Cardiovascular Surgery
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    • v.24 no.9
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    • pp.843-852
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    • 1991
  • We prospectively studied postoperative cardiac arrhythmia after open heart surgery to analyze the types and incidence of cardiac arrhythmia and to predict preoperative risk factors. And also we evaluated the effectiveness of atrial and ventricular epicardial electrodes which were placed during operation Between March 1990 and August 1990, We had operated on in 211 patients and we studied 201 consecutive patients excluding 10 patients. The study group included 99 males and 102 female patients, ages 1 month to 75 years[Mean$\pm$SD=28.0$\pm$21.7 years]. Postoperatively, all patients were regularly seen by the cardiac surgeon and cardiologist, They had continuous electrocardiographic monitoring for the first 3 days, initially in the intensive care unit and were checked routine electrocardiography on the postoperative 7 days, The postoperative cardiac arrhythmia were analyzed and possible associations of this arrhythmia with various pre, intra, and postoperative factors were studied by univariate and multivariate discriminant analysis, The overall incidence of postoperative cardiac arrhythmia except relative sinus bradycardia was 36.8%;[74/201], The incidence of postoperative cardiac arrhythmia in acyanotic congenital heart disease: 19.4%, cyanotic congenital heart disease: 20.8%, cardiac arrhythmia surgery: 33.3%, acquired valvular heart disease: 60.9% and coronary artery occlusive disease: 38.9%. Both univariate and multivariate studies indicated the pre operative symptom duration[p = 0013], the duration of medication[p=0.003], presence of preoperative arrhythmia[p<0.001] and pre-operative left atrial dimension in echocardiography to be the factor promoting postoperative cardiac arrhythmia. Multivariate discriminant analysis showed that the presence of preoperative cardiac arrhythmia, bypass time and the duration of preoperative symptom duration conveyed considerable risk factor on post-operative arrhythmia. The atrial wire electrodes were used diagnostically in 36 and were used therapeutically in 89 among 201 patients. Atrial pacing were used to treat relative sinus bradycardia, accelerated junctional tachycardia or premature atrial or ventricular contractions in 51 patients. Atrioventricular sequential pacing were used in 16 patients and ventricular pacing were used in 20 patients. Hemodynamics were evaluated in 2 patients of relative sinus bradycardia before and after atrial pacing. The atrial pacing increased the amount of cardiac output to 15% more. Because of their great utility in the diagnosis and treatment of arrhythmias, we conclude that routine placement of atrial and ventricular electrodes at the time of operation is indicated regardless of the nature of the open-heart procedure.

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Design of Arrhythmia Automatic Diagnostic System Using Decision Table (판정테이블을 이용한 부정맥 자동진단 시스템 설계에 관한 연구)

  • 정기삼;이재준
    • Journal of Biomedical Engineering Research
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    • v.12 no.1
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    • pp.63-70
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    • 1991
  • Design of Arrhythmia Automatic Diagnostic System Using Decision Table We have developed an arrhythmia automatic diagnostic system using decision table which is based on the criteria of Minnesota code. This system is divided into two Parts. One is wave detection algorithm using significant point extraction method, the other is arrhythmia diag- nostic algorthm. The proposed system allows physicians to diagnose more accurately by pro- viding the objective information about a lot of computer -processed ECG data.

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