RESUMO
In the study of cardiac activity, manual determination of local activation times is a time-consuming process that precludes the application of cardiac activity during a clinical procedure or an electrophysiologic experiment. Based on former bipolar algorithm and unipolar algorithm, this paper presents a novel method. Using unipolar electrograms and bipolar electrograms simultaneously, this method determines the activation times with good accuracy.
Assuntos
Humanos , Potenciais de Ação , Algoritmos , Processamento Eletrônico de Dados , Simulação por Computador , Eletrocardiografia , Métodos , Técnicas Eletrofisiológicas Cardíacas , Métodos , Coração , FisiologiaRESUMO
This paper introduces the history and background of studies on the mechanism of atrial fibrillation. The necessary equipment to study atrial fibrillation--a high-resolution cardiac mapping system is presented. This equipment has provided a strong basis for the future study to acquire a precise understanding of the mechanism of atrial fibrillation.
Assuntos
Humanos , Fibrilação Atrial , Eletrocardiografia , Métodos , Técnicas Eletrofisiológicas Cardíacas , Métodos , Processamento de Sinais Assistido por Computador , SoftwareRESUMO
The first thorny problem in the study of atrial fibrillation (AF) is the establishment of reliable animal models. This paper presents how to create a canine sterile pericarditis model. A new data analysis method, Fast Fourier Transform is introduced. The data from canine sterile pericarditis model was analyzed using FFT. The results demonstrate that canine sterile pericarditis model is a reliable animal model for studying AF and that FFT is a rapid and effective method for analyzing AF data.
Assuntos
Animais , Cães , Masculino , Fibrilação Atrial , Interpretação Estatística de Dados , Modelos Animais de Doenças , Eletrocardiografia , Análise de Fourier , Pericardite , Processamento de Sinais Assistido por ComputadorRESUMO
Objective To investigate the practical values of the treatment of acne vulgaris with red-light and blue-right.Methods 45 cases of adneoid cystic carcinoma and some normal parotid tissue were chosen and were immunochistochemical stained with S100 protein and GFAP.Results 43 cases of them were healed completely well and 8 cases improved.The total effective rate of group was 92.73%.Conclusion The treatmen of acne with 633?6nm red-light and 415?5nm blue-light was safe and effective.It could also improve their skin property and dcrease the relapse level of acne.