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  1. Article ; Online: COVID-19 epidemic curve in Brazil

    Airandes de Sousa Pinto / Carlos Alberto Rodrigues / Carlito Lopes Nascimento Sobrinho / Lívia Almeida da Cruz / Edval Gomes dos Santos Junior / Paulo Cesar Nunes / Matheus Gomes Reis Costa / Manoel Otávio da Costa Rocha

    Revista da Sociedade Brasileira de Medicina Tropical, Vol

    a sum of multiple epidemics, whose inequality and population density in the states are correlated with growth rate and daily acceleration. An ecological study

    2022  Volume 55

    Abstract: ABSTRACT Background: The epidemic curve has been obtained based on the 7-day moving average of the events. Although it facilitates the visualization of discrete variables, it does not allow the calculation of the absolute variation rate. Recently, we ... ...

    Abstract ABSTRACT Background: The epidemic curve has been obtained based on the 7-day moving average of the events. Although it facilitates the visualization of discrete variables, it does not allow the calculation of the absolute variation rate. Recently, we demonstrated that the polynomial interpolation method can be used to accurately calculate the daily acceleration of cases and deaths due to COVID-19. This study aimed to measure the diversity of epidemic curves and understand the importance of socioeconomic variables in the acceleration, peak cases, and deaths due to COVID-19 in Brazilian states. Methods: Epidemiological data for COVID-19 from federative units in Brazil were obtained from the Ministry of Health’s website from February 25 to July 11, 2020. Socioeconomic data were obtained from the Instituto Brasileiro de Geografia e Estatística (https://www.ibge.gov.br/). Using the polynomial interpolation methods, daily cases, deaths and acceleration were calculated. Moreover, the correlation coefficient between the epidemic curve data and socioeconomic data was determined. Results: The combination of daily data and case acceleration determined that Brazilian states were in different stages of the epidemic. Maximum case acceleration, peak of cases, maximum death acceleration, and peak of deaths were associated with the Gini index of the gross domestic product of Brazilian states and population density but did not correlate with the per capita gross domestic product of Brazilian states. Conclusions: Brazilian states showed heterogeneous data curves. Population density and socioeconomic inequality were correlated with a more rapid exponential growth in new cases and deaths.
    Keywords COVID-19 ; SARS-CoV-2 ; Polynomial interpolation ; Growth rate ; Acceleration ; Epidemic curve ; Arctic medicine. Tropical medicine ; RC955-962
    Language English
    Publishing date 2022-02-01T00:00:00Z
    Publisher Sociedade Brasileira de Medicina Tropical (SBMT)
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Covid-19 growth rate analysis

    Airandes de Sousa Pinto / Edval Gomes dos Santos Júnior / Carlos Alberto Rodrigues / Paulo Cesar Mendes Nunes / Livia Almeida da Cruz / Matheus Gomes Reis Costa / Manoel Otávio da Costa Rocha

    Revista da Sociedade Brasileira de Medicina Tropical, Vol

    application of a low-complexity tool for understanding and comparing epidemic curves

    2020  Volume 53

    Abstract: Abstract INTRODUCTION: The acceleration of new cases is important for the characterization and comparison of epidemic curves. The objective of this study was to quantify the acceleration of daily confirmed cases and death curves using the polynomial ... ...

    Abstract Abstract INTRODUCTION: The acceleration of new cases is important for the characterization and comparison of epidemic curves. The objective of this study was to quantify the acceleration of daily confirmed cases and death curves using the polynomial interpolation method. METHODS: Covid-19 epidemic curves from Brazil, Germany, the United States, and Russia were obtained. We calculated the instantaneous acceleration of the curve using the first derivative of the representative polynomial. RESULTS: The acceleration for all curves was obtained. CONCLUSIONS: Incorporating acceleration into an analysis of the Covid-19 time series may enable a better understanding of the epidemiological situation.
    Keywords Covid-19 ; SARS-CoV-2 ; Polynomial interpolation ; Arctic medicine. Tropical medicine ; RC955-962
    Language English
    Publishing date 2020-07-01T00:00:00Z
    Publisher Sociedade Brasileira de Medicina Tropical (SBMT)
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  3. Article ; Online: Disfunção miocárdica em pacientes chagásicos sem cardiopatia aparente Myocardial dysfunction in chagasic patients with no apparent heart disease

    Airandes de Sousa Pinto / Braulio Muzzi Ribeiro de Oliveira / Fernando Antonio Botoni / Antonio Luiz Pinho Ribeiro / Manoel Otavio da Costa Rocha

    Arquivos Brasileiros de Cardiologia, Vol 89, Iss 6, Pp 385-

    2007  Volume 390

    Abstract: FUNDAMENTO: O índice de Tei avalia simultaneamente as funções sistólica e diastólica dos ventrículos. Apresenta boa correlação com dados hemodinâmicos e tem sido capaz de detectar alterações na função ventricular iniciais de diversas etiologias. OBJETIVO: ...

    Abstract FUNDAMENTO: O índice de Tei avalia simultaneamente as funções sistólica e diastólica dos ventrículos. Apresenta boa correlação com dados hemodinâmicos e tem sido capaz de detectar alterações na função ventricular iniciais de diversas etiologias. OBJETIVO: Estudar alterações iniciais da função biventricular em pacientes chagásicos sem cardiopatia aparente por meio do índice de Tei. MÉTODOS: Foram avaliados 48 indivíduos. Grupo 1, constituído por 25 pacientes com diagnóstico de doença de Chagas, sem cardiopatia aparente e ecocardiograma normal; grupo 2, constituído por 23 indivíduos sadios com sorologia negativa para doença de Chagas. RESULTADOS: O índice de Tei foi significativamente mais elevado no grupo de chagásicos sem cardiopatia aparente, quando comparado aos controles. Índice de Tei do ventrículo esquerdo (0,48±0,11 x 0,36±0,06, p<0,001) , índice de Tei do ventrículo direito (0,34±0,10 x 0,26±0,07, p=0,001). O índice de Tei do ventrículo esquerdo foi considerado alterado em 48% dos chagásicos e o do ventrículo direito em 28%. CONCLUSÃO: Pacientes com doença de Chagas sem cardiopatia aparente apresentam alteração precoce dos ventrículos direito e esquerdo. BACKGROUND: The Tei index simultaneously evaluates the ventricular systolic and diastolic functions. It has a good correlation with hemodynamic data and has enabled the detection of initial ventricular function alterations of different etiologies. OBJECTIVE: To study initial biventricular function alterations in chagasic patients with no apparent heart disease, using the Tei index. METHODS: Forty eight individuals were evaluated. Group 1 was comprised of 25 patients diagnosed with Chagas´ disease with no apparent heart disease and normal echocardiogram; group 2 was comprised of 23 healthy individuals with negative serological tests for Chagas´ disease. RESULTS: The Tei index was significantly higher in the group of chagasic patients with no apparent heart disease when compared to that of the control group: left ventricular Tei index (0.48 ± 0.11 vs. 0.36 ± 0.06, p < 0.001) , right ventricular Tei index (0.34 ± 0.10 vs. 0.26 ± 0.07, p = 0.001). The left and right ventricular Tei indexes were considered abnormal in 48% and 28% of the chagasic patients, respectively. CONCLUSION: Chagasic patients with no apparent heart disease present early alterations of the right and left ventricles.
    Keywords Disfunção ventricular ; doença de Chagas ; cardiomiopatia chagásica ; Ventricular dysfunction ; Chagas´ ; disease ; cardiomyopathy ; Diseases of the circulatory (Cardiovascular) system ; RC666-701 ; Specialties of internal medicine ; RC581-951 ; Internal medicine ; RC31-1245 ; Medicine ; R ; DOAJ:Cardiovascular ; DOAJ:Medicine (General) ; DOAJ:Health Sciences
    Language English
    Publishing date 2007-12-01T00:00:00Z
    Publisher Sociedade Brasileira de Cardiologia - SBC
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

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