• 한국응급구조학회지
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• 제25권1호
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• pp.243-249
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• 2021

A decrease in coronary blood flow leads to an imbalance between the supply of oxygen to the myocardium and its demand, and reversible or irreversible damage to the myocardium could occur depending on the severity of the resultant ischemia and the duration of the imbalance. This imbalance results in a cascade of ischemic reactions in the following order: metabolic abnormalities, diastolic dysfunction, systolic dysfunction, and electrocardiogram changes. Variant angina is caused by the closure of the coronary artery due to reversible coronary artery spasm, resulting in myocardial ischemia and subsequent chest pain as a clinical symptom. Variant angina may be observed as ST segment elevation in electrocardiogram measured when present in chest pain. However, 12-lead electrocardiogram performed after the patient's chest pain resolves does not help in the diagnosis. Since the duration of chest pain appears to be <15 minutes, it is important to perform the 12-lead electrocardiogram when clinical symptoms are present. If nitroglycerin is administered without performing 12-lead electrocardiogram by 119 pre-hospital paramedics, the chest pain would be resolved, making it impossible to identify changes in the ST segment. Before administration of nitroglycerin, changes in the ST segment must be recorded by performing 12-lead electrocardiogram.

• International Journal of Computer Science & Network Security
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• 제23권9호
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• pp.150-156
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• 2023

For a doctor, diagnosing a patient's heart disease is not easy. It takes the ability and experience with high flying hours to be able to accurately diagnose the type of patient's heart disease based on the existing factors in the patient. Several studies have been carried out to develop tools to identify types of heart disease in patients. However, most only focus on the results of patient answers and lab results, the rest use only echocardiography data or electrocardiogram results. This research was conducted to test how accurate the results of the classification of heart disease by using two medical data, namely echocardiography and electrocardiogram. Three treatments were applied to the two medical data and analyzed using the decision tree approach. The first treatment was to build a classification model for types of heart disease based on echocardiography and electrocardiogram data, the second treatment only used echocardiography data and the third treatment only used electrocardiogram data. The results showed that the classification of types of heart disease in the first treatment had a higher level of accuracy than the second and third treatments. The accuracy level for the first, second and third treatment were 78.95%, 73.69% and 50%, respectively. This shows that in order to diagnose the type of patient's heart disease, it is advisable to look at the records of both the patient's medical data (echocardiography and electrocardiogram) to get an accurate level of diagnosis results that can be accounted for.

• Clinical and Experimental Pediatrics
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• 제45권9호
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• pp.1059-1064
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• 2002

• 전기학회논문지
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• 제67권7호
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• pp.898-902
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• 2018

A novel heart beat interval estimation algorithm is presented based on parabola approximation method. This paper presented a two-step processing scheme; a first stage is finding R-peak in the Electrocardiogram (ECG) by Shannon energy envelope estimator and a secondary stage is computing the interpolated peak location by parabola approximation. Experimental results show that the proposed algorithm performs better than with the previous method using low sampled ECG signals.

• 대한한방내과학회지
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• 제29권4호
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• pp.1130-1137
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• 2008

Objectives : Oriental medical doctors usually use the three-finger pulse diagnosis method to observe disease. Since it is difficult to diagnose ischemic heart disease (IHD) objectively by this diagnostic method, we performed the study to diagnose it as soon as possible by using Yuk Bu Jung Wee Jin Mac(六部定位診脈) and electrocardiogram(ECG). Methods : Patients who had abdominal discomfort were observed by Yuk Bu Jung Wee Jin Mac(六部定位診脈) and we presumed they had heart disease and checked them with electrocardiogram(ECG). Results : We diagnosed it early by using Yuk Bu Jung Wee Jin Mac(六部定位診脈) and electrocardiogram (ECG). Conclusions : The study suggests that it is easy to diagnose IHD early using Yuk Bu Jung Wee Jin Mac(六部定位診脈) and ECG. More data related to IHD is needed.

• 한국콘텐츠학회논문지
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• 제8권1호
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• pp.186-194
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• 2008

본 논문에서는 인체의 심전도를 측정하여 언제 어디서나 환자의 건강상태를 체크할 수 있는 유비쿼터스 헬스 케어 시스템을 구현하였다. 구현된 시스템은 심전도 측정 단말기, 자료 수집 베이스 노드, 의료 정보 수집 서버로 구성된다. 구현된 단말기는 지그비(Zigbee) 프로토콜을 통하여 센서 네트워크를 구성하며 TinyOS가 내장되어 있는 초소형 보드로 설계되었다. 자료 수집 베이스 노드는 무선 리눅스 단말기로 구성되어 서버로 무선 랜을 통하여 센싱된 정보를 실시간으로 전송한다. 또한 의료 정보 수집 서버는 단말기에서 얻은 데이터를 저장 관리하며 긴급 상황 발생 시 연계된 의료진에게 환자의 상태를 보고하도록 설계되었다. 실험 결과 지그비 통신 프로토콜을 이용한 센서 네트워크를 통하여 유비쿼터스 헬스 케어 시스템이 구현 가능함을 확인하였다.

• 한국콘텐츠학회논문지
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• 제9권12호
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• pp.496-503
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• 2009

물질적 풍요로움뿐만 아니라 품질이 다변화 되어가는 생활환경 속에서 감성에 따른 생체신호를 파악하는 것은 감성공학 전략의 중요한 성공요소가 되고 있다. 이를 위하여 제품의 기능적 측면뿐만 아니라 정서적 감정과 선호도가 반영된 제품의 설계나 디자인 또한 요구되고 있다. 본 논문에서는 웨어러블 기반의 심전도 측정 의복을 이용한 시각감성과 생체신호간의 상관관계를 제안하였다. 심전도 측정 의복을 착용함으로 심전도 ECG 파형을 측정하였다. 심전도 측정 의복을 착용에 의해 수집된 심전도 파형으로부터 심박변화율을 계산한다. 그리고 고속 퓨리에 변환을 이용한 파워 스펙트럼 분석은 시각감성과 생채신호의 상관관계를 평가한다. 제안된 방법에 대해서 논리적 타당성과 유효성을 검증하기 위해 실험적인 적용을 시도하고자 한다.

• 대한의생명과학회지
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• 제21권3호
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• pp.135-143
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• 2015

Electrocardiogram measures the electric impulses generated by the heart during its cycle. Recently genome-wide association studies on electrocardiogram traits revealed many relevant genetic loci. Therefore, these findings need to be validated and investigated to determine the underlying mechanisms using mouse models. Invasive radiotelemetry has been widely used to record the electrocardiogram in mice because it has several advantages over non-invasive measurements. However, radiotelemetry is expensive and requires complicated surgery. On the other hand, a non-invasive method using 3 electrodes (one for earth) for lead II is easy to establish and allows for rapid measurement. In this study, eleven mice were measured with this non-invasive method and no statistical difference among them was found in any ECG measurements. In addition, repeat measurement in the same mouse was performed in 9 sets of experiment and the results indicated that non-invasive method was reliable for reproducibility. Further it was shown that measurements for 1, 5, 10, and 15 minutes were not different so that a short recording such as 5 minutes was enough to estimate the ECG values including heart rate. Further this method was validated by measuring the ECG of Balb/c and FVB that were previously shown to differ in ECG values by radiotelemetry. Significant differences were found in heart rate, PR interval and corrected QT interval between these mouse strains. This study partially proved that non-invasive method also could provide the accuracy and reproducibility. Based on these results, the non-invasive ECG recordings of lead II is recommended as a useful method for quick test in mouse model.

• 디지털융복합연구
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• 제20권5호
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• pp.637-642
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• 2022

심전도(ECG, electrocardiogram) 신호를 이용한 본인 인증기술은 기존의 바이오 인증을 대체할 수 있는 본인 인증기술로 주목받고 있다. 디지털 전자키를 인식하는 장치를 차량에 탑재하여 자동차와 무선으로 데이터를 송수신할 수 있게 하고, 스마트폰 등을 활용해 자동차의 차 문을 잠금 또는 해제하거나, 시동을 걸 수 있는 기능을 스마트폰을 통해 차량 제어할 수 있다. 그러나 스마트키는 보안에 취약하여 이를 해결하고 운전자의 편의성을 제공하기 위해 바이오 인증기술을 적용한 스마트키를 연구하였다. 심전도를 이용한 개인인증 알고리즘을 시계 형태의 웨어러블 디바이스에 탑재하여 바이오인증을 하고 개인인증이 완료되면 자동차의 스마트키 기능을 할 수 있었다. 인증율 95%를 달성하였다. 운전자는 스마트키를 소지할 필요가 없고, 분실 및 해킹에 안전하게 보호할 수 있는 대안으로 스마트키를 제안한다. 심전도를 이용한 개인 인증기술을 활용한 스마트키는 개인인증을 통해 다양한 분야에 적용이 가능하고 향후 심전도를 이용한 본인확인 장치 등에 적용할 수 있는 방법을 연구할 계획이다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2009년도 춘계학술대회
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• pp.237-240
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• 2009

건강한 사람은 물론, 특히 심질환을 갖고 있는 사람들을 위하여 휴대형 측정기기를 통해 자신의 현재 위험 정도를 판단할 수 있는 장치를 제안하였다. 이를 위하여 심전도(ECG, electrocardiogram) 및 심음도(PCG, phonocardiogram) 정보를 사용하였다. ECG와 PCG 정보는 각기 전극과 마이크로폰을 사용하여 얻었다.