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Comparison of different methods of heart rate entropy analysis during acute ano...

Acute life-threatening situations are particularly critical when superimposed on chronic diseases. The objective of this study was the assessment of heart rate (HR) dynamics during episodes of acute anoxia superimposed on a rat model of chronic pulmonary hypertension. In 10 adult Wistar rats, five weeks after pulmonary hypertension induction with Monocrotaline, we analysed eight 1-min HR segments, during episod...

Identification of Foliar Diseases in Cotton Crop

The pathogens manifestation in plantations are the largest cause of damage in several cultivars, which may cause increase of prices and loss of crop quality. This paper presents a method for automatic classification of cotton diseases through feature extraction of leaf symptoms from digital images. Wavelet transform energy has been used for feature extraction while Support Vector Machine has been used for class...

Analysis of heart rate variability in a rat model of induced pulmonary hyperten...

Monocrotaline (MCT) is commonly used to experimentally induce pulmonary hypertension (PH), which might lead to chronic heart failure. In this study, linear and non-linear heart rate (HR) dynamics were weekly assessed in MCT-treated and non-treated Wistar rats. The HR of 10 adult Wistar rats injected with MCT (MCT group) and of 10 similar rats injected with vehicle (non-MCT group), anesthetized with Ketamine, wa...

Linear and nonlinear heart-rate analysis in a rat model of acute anoxia.

Linear and nonlinear heart-rate analysis in a rat model of acute anoxia.

Linear and nonlinear heart-rate analysis in a rat model of acute anoxia

The objective of this study was the assessment of heart-rate (HR) dynamics with linear and nonlinear methods during episodes of mechanical ventilation and acute anoxia in rats. Namely, to assess whether linear and nonlinear HR analysis was able to discriminate acute anoxia from baseline in rats and if this was consistent with human foetal and adult studies. Five HR segments of 1 min duration, during baseline re...

Systemic lupus erythematosus: imaging of central nervous system involvement by ...

Patients with systemic lupus erythematosus (SLE) can develop dysfunction of the central nervous system (CNS) and have several neurologic syndromes with heterogeneous pathogenic mechanisms. The most common neurologic manifestations of SLE are organic mental syndromes, functional psychoses and seizures.We retrospectively reviewed the magnetic resonance imaging (MRI) of SLE patients with CNS involvement followed i...

Automated analysis of cardiotocographic signals.

Cardiotocographic signals, used as a perinatal diagnostic tool, comprise fetal heart beat signals (FHR), uterine contractions (UC) and fetal movements (FM). Visual inspection of these three signals is limited, subjective, time consuming and with low reproducibility. The present paper illustrates an application of signal processing techniques to the automatic analysis of cardiotocographic signals, allowing to ov...