Análise de registros eletrocardiográficos associados ao infarto agudo do miocárdio

Abstract

OBJECTIVEEvaluate correlations between variations in eletrocardiogram (ECG) recordings and acute myocardial infarction. METHODSUse of a low-cost software to digitalize printed and/or ".pdf" fi le format ECG recordings. Calculation of STsegment area and amplitudes of the J and Y points. RESULTSThe amplitude of the Y point holds maximum correlation with troponin concentration. ST-segment elevation is not a good statistical indicator of myocardial infarction severity. There is a strong negative correlation between the amplitude of the J point and the amount of magnesium ions, but no statistical correlation with sodium or calcium ions. Neither method for calculating the STsegment area (pixel counts and interpolation) indicated any signifi cant differences in the results. CONCLUSIONThe software used proved to be functional and costeffective. Y point amplitude is a sensitive marker of myocardial infarction, and is also a calculation method both simpler to use and less subject to error than the calculation of the ST-segment elevation area. KEY WORDSAcute myocardial infarction, telemedicine, eletrocardiogram.

Incidência da queixa de dor torácica como sintoma de infarto agudo do miocárdio em uma unidade de pronto-atendimento

“…About 50% of the AMI cases showed a change in the ECG tracing with ST-segment elevation. In this study, of the three confirmed cases, two had altered electrocardiograms, that is, 66.7%, similar to the study by Mansur et al 10 . The same authors 10 stated that there was a 91% specificity of the diagnosis by this method, which may justify why no tissue necrosis markers test, also called cardiac enzymes, was performed in the UCU.…”

“…In this study, of the three confirmed cases, two had altered electrocardiograms, that is, 66.7%, similar to the study by Mansur et al 10 . The same authors 10 stated that there was a 91% specificity of the diagnosis by this method, which may justify why no tissue necrosis markers test, also called cardiac enzymes, was performed in the UCU. The study showed that the cardiac causes are not the first cause of chest pain, and among the cardiac causes AMI is one of the diseases, but there are others, as also identified in a study by Barbosa et al 4 .…”

Patients with acute myocardial infarction and interfering factors when seeking emergency care: implications for health education

“…In this study, education, gender and age were not determining in the analysis of the time patients took to seek for a cardiac service. However, literature shows that women and elderly people take more time to go to an emergency service (6,8,12) . This study also showed a longer average time for patients who used ambulance services in relation to the others, and this fact contradicts other studies which state that the average time from the beginning of the pain to the moment they get to the emergency service decreases when using ambulance services (9)(10) .…”

“…One study states that patients in Brazil do not seek healthcare services promptly because they do not recognize AMI symptoms, because they do not accept what they are feeling, because first aid is not specialized and because of bad public transportation (6) . Identifying the reasons why patients delay the search for health services is important because, based on these data, nursing professionals can interfere and educate patients, their relatives and the community.…”

Desenvolvimento De Um Software Para Análise De Eletrocardiogramas Utilizando Dispositivos Móveis

“…Além da variação alta na precisão dos diagnósticos, quando se analisa os equipamentos para exames cardíacos e pessoal qualificado, percebe-se que ainda há uma boa quantidade de eletrocardiógrafos analógicos, principalmente na rede pública de hospitais e ainda há uma carência de profissionais qualificados para dar conta da demanda de exames feitos, pondera-se, então, que a tecnologia pode ajudar a encontrar soluções para alguns destes problemas. (Mansur, 2006). Focado na tentativa de ajudar a diminuir o quadro de óbitos causados pelas doenças cardíacas, amenizar a falta de profissionais e viabilizar o uso de equipamentos antigos, optou-se pelo desenvolvimento de uma aplicação que pudesse atender a estes quesitos.…”