Qrs Complex
Mostrando 1-12 de 61 artigos, teses e dissertações.
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1. The relationship between premature ventricular complexes and index of cardiac-electrophysiological balance
SUMMARY OBJECTIVE: Premature ventricular complexes are common in healthy individuals’ ambulatory monitoring. The index of cardiac-electrophysiological balance may predict malignant ventricular arrhythmias. This study investigated the relation between Premature ventricular complex burden and index of cardiac-electrophysiological balance in 24-h Holter moni
Revista da Associação Médica Brasileira. Publicado em: 2023
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2. Electrocardiographic Abnormalities in Hypertension Models
Abstract Background: Hypertensive condition can lead to abnormalities in heart structure and electrical activity. The electrocardiogram (ECG) is a recording of the electrical activity of the heart and widely used to diagnose and detect heart problem. Objective: We conducted a comparative ECG analysis between two hypertension models (L-NAME and SHR) and the
Int. J. Cardiovasc. Sci.. Publicado em: 2020-07
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3. Heartbeat classification system based on neural networks and dimensionality reduction
Abstract Introduction This paper presents a complete approach for the automatic classification of heartbeats to assist experts in the diagnosis of typical arrhythmias, such as right bundle branch block, left bundle branch block, premature ventricular beats, premature atrial beats and paced beats. Methods A pre-processing step was performed on the electroca
Res. Biomed. Eng.. Publicado em: 12/01/2017
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4. Detecção e classificação de arritmias em eletrocardiogramas usando transformadas wavelets, máquinas de vetores de suporte e rede Bayesiana
The cardiopathies are currently, according the Ministério da Saúde, the second biggest cause of mortality among the Brazilians, behind only the brain vascular diseases. The motivation for the work here presented is the identification and classification of cardiopathies registered in Electrocardiogram exams, ECG, such as premature contractions, branches blo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/03/2012
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5. Enzyme replacement therapy for Fabry disease: a systematic review and meta-analysis
The specific treatment available for Fabry disease (FD) is enzyme replacement therapy (ERT) with agalsidase alfa or beta. A systematic review and meta-analysis was conducted to assess the efficacy and safety of ERT for FD. Only double-blind, randomized clinical trials (RCTs) comparing agalsidase alfa or beta and placebo were included. ERT with either agalsid
Genet. Mol. Biol.. Publicado em: 2012
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6. Detecção do complexo QRS em sinais cardiacos utilizando FPGA / QRS complex detection in cardiac signals using FPGA
The electrocardiogram (ECG) is a tool used for diagnosis of diseases related to the heart. This work has the purpose of detecting QRS complex, focusing on the R wave, which represents the ventriclescontraction. It is presented two techniques of processing ECG signals. The first uses Pan &Tompkins algorithm based on digital filtering. The second uses the di
Publicado em: 2009
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7. Sistema automÃtico para anÃlise de variabilidade da freqÃencia cardÃaca / Automatic system for analysis of heart rate variability
This dissertation describes a system for analysis of heart rate variability through metrics on time and frequency domain and by non-linear methodology, which is initiated by the process of segmentation of the QRS complex of the electrocardiogram signal. The motivation for this work is the analysis of the influence from the algorithms of beat segmentation and
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/10/2008
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8. Significado da evolução eletrocardiográfica na doença de Chagas
Background: The cardiomyopathy is the main complication of Chagas disease. The baseline electrocardiogram (EKG) can demonstrate a wide range of abnormalities, and it is able to provide valuable clinical information regarding diagnosis and prognosis of this disease. The aim of this paper is to describe the evolution of the electrocardiographic findings after
Publicado em: 2008
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9. Effect of pectin and cellulose in the toxicity of pyrethroids insecticides in electrocardiographics and morphologicals parameters in male weaning Wistar rats. / Efeito da pectina e da celulose na toxicidade de inseticidas piretroides sobre parametros eletrocardiograficos e morfologicos em ratos Wistar machos recem desmamados.
The study was conducted on male wealing Wistar rats. They were exposed, by gavage, to deltamethrin and permethrin and the carditoxic effects of the pyrethroids and protective effects of dietary fibres were determinated. The purposes of this study were the eletrocardiographics evaluation, the histopathological study of the liver and heart and the residues det
Publicado em: 2008
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10. Avaliação ecocardiografica da terapia de ressincronização cardiaca : dois anos de seguimento / Echocardiographic assessment of the cardiac resynchronization therapy : two years of follow-up
Introduction In the cardiac resynchronization therapy is an effective option for patients with advanced heart failure. However, 20 to 30% of patients did not show benefits to this therapy. Clinical criteria, electrocardiography and the echocardiography have been studied in an attempt to select the patients who will benefit from the cardiac resynchronization,
Publicado em: 2008
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11. Infusão contínua de xilazina ou dexmedetomidina em cadelas pré-tratadas ou não com atropina: alterações eletrocardiográficas.
Alpha-adrenergic agonist drugs were synthesized at the beginning of the sixties. These drugs cause analgesic, sedative, ansiolitic and simpatholitics effects. Their use is extensive in veterinary due to their sedative, analgesic and miorrelaxantes effects. Alpha-adrenergic agonists cause significant changes in the cardiopulmonary system. Bradicardy, arrhythm
Publicado em: 2007
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12. Alterações eletrocardiográficas em cirugias para a colocação de implantes dentários sob anestesia local e pré-medicação ansiolítica" / Electrocardiographic changes during oral implant surgeries under local anesthesia and sedative premedication
The clinical significance of eletrocardiographic evalution in patients without cardiovascular disease is very small. However, continuous monitoring using electrocardiogram and anxiety control methods, such as behaviour manegement technique and premedication, may be justified in patients with cardiovascular disease undergoing dental procedures that cause stre
Publicado em: 2006