Analysis of QRS loop in the Vectorcardiogram of patients with Chagas' disease

Correa, Raúl; Laciar, Eric; Arini, Pedro David; Jané, R.

doi:10.1109/iembs.2010.5626863

Cited by 12 publications

(12 citation statements)

References 16 publications

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“…Correa et al [16] introduced six (maximum magnitude of the depolarization vector of QRS loop, volume of QRS loop, planar area of QRS loop, ratio between the area and the perimeter of QRS loop, ratio between the major and the minor axes of QRS loop, and QRS loop energy) different VCG-based parameters to investigate the morphological changes in the QRS loop for ischemic patients that underwent percutaneous transluminal coronary angioplasty (PTCA). They showed that VCG-based parameters were significantly different before, during, and after PTCA.…”

Section: Beat-to-beat Vcg-based Parametersmentioning

confidence: 99%

A review of beat-to-beat vectorcardiographic (VCG) parameters for analyzing repolarization variability in ECG signals

Hasan¹,

Abbott²

2016

Biomedical Engineering / Biomedizinische Technik

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Elevated ventricular repolarization lability is believed to be linked to the risk of ventricular tachycardia/ventricular fibrillation. However, ventricular repolarization is a complex electrical phenomenon, and abnormalities in ventricular repolarization are not completely understood. To evaluate repolarization lability, vectorcardiography (VCG) is an alternative approach where the electrocardiographic (ECG) signal can be considered as possessing both magnitude and direction. Recent research has shown that VCG is advantageous over ECG signal analysis for identification of repolarization abnormality. One of the key reasons is that the VCG approach does not rely on exact identification of the T-wave offset, which improves the reproducibility of the VCG technique. However, beat-to-beat variability in VCG is an emerging area for the investigation of repolarization abnormality though not yet fully realized. Therefore, the purpose of this review is to explore the techniques, findings, and efficacy of beat-to-beat VCG parameters for analyzing repolarization lability, which may have potential utility for further study.

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Section: Beat-to-beat Vcg-based Parametersmentioning

confidence: 99%

A review of beat-to-beat vectorcardiographic (VCG) parameters for analyzing repolarization variability in ECG signals

Hasan¹,

Abbott²

2016

Biomedical Engineering / Biomedizinische Technik

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“…• El vectocardiograma podrá ser utilizado en el estudio de problemas cardiacos propios de la región, como el mal de CHAGAS [11], el cual serviría para obtener eficazmente un diagnostico tomando diversos parámetros de este, como el eje mayor y menor de la representación espacial de la actividad eléctrica del corazón.…”

Section: Conclusionesunclassified

Implementación de un modelo para la representación vectorial de la actividad eléctrica del corazón en un espacio tridimensional

Niño

Pérez

Quimbayo³

et al. 2016

Sci. tech

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Al implementarse una tarjeta electrónica con la cual se adquiere la información proveniente de tres canales electrocardiográficos cuasi-ortogonales entre sí, V2, aVF, D1 se obtienen los datos necesarios para representar mediante ellos la actividad eléctrica del corazón en un espacio tridimensional. El vectocardiograma representa la actividad eléctrica del corazón en forma vectorial, esta representación necesita definir el origen de coordenadas y el plano principal de proyección de las fuerzas eléctricas del corazón. Este estudio utiliza un método basado en el cálculo de momentos de inercia mecánicos para determinar la dirección correcta del vectocardiograma.

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“…O coeficiente de variação é a razão entre o desvio padrão e a média; o pNN50 é a porcentagem das diferenças absolutas entre intervalos RR normais sucessivos que excedem 50 ms; e o RMSSD é o valor eficaz das diferenças entre intervalos RR sucessivos. Essa abordagem, de se procurar a indicação de diagnóstico dos pacientes chagásicos por meio de índices diretamente computados a partir do sinal de VFC, se aproxima mais das propostas encontradas na literatura (Correa et al, 2010;Marmol-Herrera e Warwick, 2001;Vizcardo et al, 2007).…”

Section: Metodologia Experimentalunclassified

“…Nesse trabalho, foi utilizado o mesmo banco de dados construído por Pueyo et al (2007), mas são apresentados resultados de acurácia ligeiramente superior. Por sua vez, Correa et al (2010) propuseram a análise da eletrocardiografia vetorial para a caracterização de diferenças de alterações cardíacas em pacientes chagásicos crônicos com diferentes graus de dano miocárdico, a partir de avaliações estatísticas de variações do complexo QRS. Vizcardo et al (2007) descreveram uma técnica que mostra alterações espectrais nos índices de VFC associadas a doença de Chagas.…”

Section: Introductionunclassified

Sistema de apoio ao diagnóstico da Doença de Chagas baseado em escalogramas e redes neurais auto-organizáveis

Neto¹,

Carvalho²,

Rocha³

et al. 2013

RBEB

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Analysis of QRS loop in the Vectorcardiogram of patients with Chagas' disease

Cited by 12 publications

References 16 publications

A review of beat-to-beat vectorcardiographic (VCG) parameters for analyzing repolarization variability in ECG signals

A review of beat-to-beat vectorcardiographic (VCG) parameters for analyzing repolarization variability in ECG signals

Implementación de un modelo para la representación vectorial de la actividad eléctrica del corazón en un espacio tridimensional

Sistema de apoio ao diagnóstico da Doença de Chagas baseado em escalogramas e redes neurais auto-organizáveis

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