• 대한디지털의료영상학회논문지
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• 제12권1호
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• pp.1-4
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• 2010

The study was designed to transmit ECG(electrocardiogram) images from iPhone in order to check validity. Especially, web examined ECG transmissions from smart phones image viewer are good enough to secure clinical information and confirmed with visual. In result, it took 3 to 5 seconds for ECG viewer transmitting from a smart phone to display an image on mobile server to user's phone. For image valuation, we magnified the ECG image 100% or 200% at a resolution of $480{\times}320$ checking PQRST wave and found that it was both possible to see an accurate PQRST wave with all the trial data and to divide it into 1mm level of grid.

• 전기학회논문지
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• 제57권6호
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• pp.1102-1108
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• 2008

Wearable physiological signal monitoring systems are regarded as an important sensing unit platforms in ubiquitous/mobile healthcare application. In this paper, we suggested the modified bipolar electrodes implemented on the portable heart activity monitoring system, which minimized the distance of electrodes formed on a attachable pad. The proposed electrode configuration is useful in mobile measurement environments, but has a disadvantage of reduced amplitude of the heart action potential. In order to overcome the shortcoming of the suggested electrode configuration, we implemented the amplifying circuit to increase the signal-gain and decrease the artifacts. For evaluations, we analyzed the specificity of measured cardiography using the proposed electrodes through the comparing of heart activity monitoring system with standard clinical ECG(lead2) by pearson correlation coefficients. The result showed that the average correlation coefficient is $0.903{\pm}0.036,\;0.873{\pm}0.072$ at V3, V4 chest lead position, respectively. Thus, the modified bipolar electrode is quite suitable to monitor the electrical activity of the heart in the situation of the mobile environment, and could be considered having high similarity with standard clinical ECG.

• 한국임상수의학회지
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• 제24권2호
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• pp.218-224
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• 2007

소동물 임상에서 디지털 심전도기가 일반 아날로그 방식의 심전도기를 빠르게 대체하고 있다. 이러한 디지털 심전도기는 일반 아날로그 방식의 심전도기에 비해서 심전도 자료의 저장 능력, 이동성 및 넓은 임상적 적용 범위를 갖는 장점이 있다. 본 연구에서는 소동물 임상에 있어서 이러한 디지털 심전도기의 유용성을 연구하였고, 실제 심장전도계 장애가 있는 4마리의 개를 진단하고 치료하였다.

• 보험의학회지
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• 제26권
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• pp.21-30
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• 2007

ECG is included in certain medical examinations of insurance application, ECG has low specificity and sensitivity. So ECG is not usually used to diagnose specific diseases. But, ECG is not invasive and costs low. So ECG is usually used in underwriting. Actually in underwriting we meet various ECG patterns and diagnosises. Understanding of various ECG patterns is different between insurance medicine and clinical medicine. So We have to learn various ECG patterns and effects on mortality and morbidity. First considerations of ECG readings are age, sex, blood pressure, family history, smoking historyalcohol history and hyperlipidemia. These are predictors for possibility of disease. Also it is important to review recording ECG with proper skill. In this review I consider several ECG diagnosises that we meet frequently, which is, LVH, RVH, ST abnormalities, LBBS, RBBB, A-B blocks, several kinds of arrhythmia. We have to consider long term mortalities and morbidities of specific ECG patterns although applicants have no symptom and sign. And then we have to make underwriting manual according to specific ECG diagnosises and patterns and underwrite precisely ECG patterns according to insurance products. Nowadays coronary heart disease and other heart diseases are increasing in Korea. So we have to learn various ECG patterns and research mortalities and morbidities of abnormal ECG patterns. Also we have to apply to more broad, precise underwriting skills about ECG patterns and diagnosises.

• 대한임상독성학회지
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• 제7권2호
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• pp.69-76
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• 2009

Purpose: Various electrocardiogram (ECG) changes can occur in patients with acute organophosphate poisoning (OPP) and may be associated with the clinical severity of poisoning. The present study aimed to evaluate the extent and frequency of ECG changes and cardiac manifestations, and their association with acute OPP clinical severity. Methods: Seventy-two adult patients admitted to our emergency department with a diagnosis of acute OPP were studied retrospectively. ECG changes and cardiac manifestations at admission were evaluated. ECG changes between respiratory failure (RF) group and no respiratory failure (no RF) groups were compared. Results: Prolongation of QTc interval (n=40, 55.6%) was the most common ECG change, followed by sinus tachycardia (n=36, 50.0%). ST-T wave changes such as ST segment elevation or depression and T wave change (inversion or non-specific change) were evident in 16 patients (22.2%). Prolongation of QTc interval was significantly higher in the RF group compared with the no RF group (p=0.03), but was not an independent predictor for RF in acute OPP (OR; 4.00, 95% CI; 0.70-23.12, p=0.12). Conclusion: While patients with acute OPP can display ECG changes that include prolongation of QTc interval, sinus tachycardia, and ST-T wave changes at admission, these changes are not predictors of respiratory failure.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1986년도 한국자동제어학술회의논문집; 한국과학기술대학, 충남; 17-18 Oct. 1986
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• pp.633-636
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• 1986

We have developed an automated ECG interpretation technique by micro-computer for rapid analysis of ECG data in the clinical hospital. This system is consisted of 16 bit microcomputer including bandpass-filter, comparator, A/D converter in order to obtain the QRS width, R-R interval.

• 디지털콘텐츠학회 논문지
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• 제17권2호
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• pp.97-103
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• 2016

이 논문에서는 심장이상 관리와 심혈관 위험 평가를 위해 임상 관련성과 연관지어 주요한 요소와 원인을 파악하는데 필요한 심전도(ECG) 데이터의 시각화 분석을 위해 경험한 기술을 소개한다. 특히, MIT-BIH ECG 데이터베이스를 기반으로 복잡한 ECG 데이터를 시각화하여 다양한 차트, 그래프로 표현할 수 있는 접근방법을 소개한다. 이러한 경험 기술 소개를 통해 많은 연구자들은 ECG 데이터베이스를 보다 쉽게 접근할 수 있고 다양한 형태로 시각화된 ECG 데이터의 의미를 직관적으로 이해할 수 있다.

• 한국응급구조학회지
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• 제23권2호
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• pp.61-73
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• 2019

Purpose: This study aimed to introduce active learning methods, including flipped, case-based, and team-based learning in an electrocardiography (ECG) course and to investigate outcomes and satisfaction with these methods. Methods: To identify the learning effect of active learning, pre-and post-academic self-efficacy was compared between the experimental and control groups. In the experimental group, pre-and post-knowledge and clinical performance regarding ECG were also assessed. In addition, class satisfaction was investigated after application of active learning methods in the experimental group. Data were collected from 84 paramedic students and analyzed using SPSS 22.0 (IBM, Armonk, NY, USA). Results: The experimental group showed significant improvement in post-academic self-efficacy and knowledge. The experimental group also showed high clinical performance (9.83 out of 10 in ECG checking ability and 9.63 out of 10 in ECG reading ability). The mean satisfaction score was 4.23 out of 5 (responses based on a Likert scale) in the experimental group. Conclusion: Active learning in an ECG course was found to be highly effective and satisfactory. Furthermore, paramedic students can enhance their accountability and judgement with team-based learning through free engagement in discussion.

• Journal of Communications and Networks
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• 제13권2호
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• pp.113-124
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• 2011

Electrocardiography (ECG) is a widely accepted approach for monitoring of cardiac activity and clinical diagnosis of heart diseases. Since cardiologists have been well-trained to accept 12-lead ECG information, a huge number of ECG systems are using such number of electrodes and placement configuration to facilitate fast interpretation. Our goal is to design a wireless ECG system which renders conventional 12-lead ECG information.We propose the three-pad ECG system (W3ECG). W3ECG furthers the pad design idea of the single-pad approach. Signals obtained from these three pads, plus their placement information, make it possible to synthesize conventional 12-lead ECG signals.We provide one example of pad placement and evaluate its performance by examining ECG data of four patients available from online database. Feasibility test of our selected pad placement positions show comparable results with respect to the EASI lead system. Experimental results also exhibit high correlations between synthesized and directly observed 12-lead signals (9 out of 12 cross-correlation coefficients higher than 0.75).

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2009년도 춘계학술대회
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• pp.337-340
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• 2009

Wireless tele-home-care application gives new possibilities for ECG (electrocardiogram) monitoring system with wearable biomedical sensors. Thus, continuously development of high convenient ECG monitoring system for high-risk cardiac patients is essential. This paper describes to monitor a person's ECG using wearable approach. A wearable belt-type ECG electrode with integrated electronics has been developed and has proven long-term robustness and monitoring of all electrical components. The measured ECG signal is transmitted via an ultra low power consumption wireless sensor node. ECG signals carry a lot clinical information for a cardiologist especially the R-peak detection in ECG. R-peak detection generally uses the threshold value which is fixed thus it bring errors due to motion artifacts and signal size changes. Variable threshold method is used to detect the R-peak which is more accurate and efficient. In order to evaluate the performance analysis, R-peak detection using MIT-BIH databases and Long Term Real-Time ECG is performed in this research. This concept able to allow patient to follow up critical patients from their home and early detecting rarely occurrences of cardiac arrhythmia.