نتایج جستجو برای: ecg جنین
تعداد نتایج: 29533 فیلتر نتایج به سال:
زمینه و هدف: سیگنال الکتروکاردیوگرام (ecg) نمایشی گرافیکی از فعالیت قلبی است. پردازش و تحلیل تغییرات مورفولوژیکی آن می تواند به تشخیص بصری بسیاری از بیماری های قلبی کمک کند. با این وجود، انواع نویز واغتشاش در سیگنال ecg تشخیص بصری و استخراج ویژگی از آن را به شدت تحت تاثیر قرار می دهد. هدف از این پژوهش، حذف نویزهای مختلف سیگنال ecg و بهبود کیفیت آن می باشد. مواد و روش ها: در این پژوهش، فیلتر تطب...
BACKGROUND Resting conventional 12-lead ECG has low sensitivity for detection of coronary artery disease (CAD) and left ventricular hypertrophy (LVH) and low positive predictive value (PPV) for prediction of left ventricular systolic dysfunction (LVSD). We hypothesized that a approximately 5-min resting 12-lead advanced ECG test ("A-ECG") that combined results from both the advanced and convent...
electrocardiogram based identification using a new effective intelligent selection of fused features
over the years, the feasibility of using electrocardiogram (ecg) signal for human identification issue has been investigated, andsome methods have been suggested. in this research, a new effective intelligent feature selection method from ecg signals hasbeen proposed. this method is developed in such a way that it is able to select important features that are necessary for identificationusing a...
The signal strength of the maternal ECG (MECG) is usually many times that of the fetal ECG (FECG). Separating FECG from abdominal ECG (AECG) is therefore always a challenge. Some multiple-lead algorithms use the thoracic MECG to cancel the MECG in the AECG to get FECG, though this is inconvenient for the patient during long-term monitoring. Hence, this paper describes an adaptive method to sepa...
the aim of this study was to determine the effects of ecg, pgf2α and gnrh hormone on improvement of reproduction performance of cidr synchronized zandi ewes in breeding season. 500 ewes with age of 2.5-4 years and same nutritional condition were selected for this study and received cidr for 12 days. then these ewes were assigned to five equal groups. first group received no hormone (control gro...
The aim of this study is to show that the measures derived from Electrocardiogram (ECG) signals many a time perform better than the same measures obtained from heart rate (HR) signals. A comparison was made to investigate how far the nonlinear symbolic dynamics approach helps to characterize the nonlinear properties of ECG signals and HR signals, and thereby discriminate between normal and cong...
In this paper, Automatic electrocardiogram (ECG) arrhythmias classification is essential to timely diagnosis of dangerous electromechanical behaviors and conditions of the heart. In this paper, a new method for ECG arrhythmias classification using wavelet transform (WT) and neural networks (NN) is proposed. Here, we have used a discrete wavelet transform (DWT) for processing ECG recordings, and...
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