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Binary numbers (BNs) generation is crucial for wireless body sensor networks (WBSNs) security because they can be utilized for authentication or encryption of physiological data in WBSNs for healthcare applications. The paper compared pseudorandom number generators and biometrics based binary number generators for WBSNs, i.e. generated from the linear congruential generator (LCG) and the interpulse...
Body sensor networks (BSNs) have emerged as a new technology for healthcare applications, but the security of communication in BSNs remains a formidable challenge yet to be resolved. The paper discusses the typical attacks faced by BSNs and proposes a fast biometric based approach to generate keys for ensuing confidentiality and authentication in BSN communications. The approach was tested on 900...
The E1784K mutation in SCN5A was reported as a phenotypic overlap between the Type 3 Long QT syndrome (LQT3) and the Brugada syndrome (BrS). However it is still unclear if the E1784K mutation-induced changes at ionic channel level is sufficient to account for the two phenotypic and how they affect ventricular excitation waves at tissue level. In this study, we used a biophysically detailed computer...
Mechanical contraction alternans of the heart is associated with fatal cardiac death. It is manifested by T-wave alternans in the ECG, and is thought to be possibly related to intracellular Ca2+ transient alternans released from the sarcoplasmic reticulum (SR). However, it is unclear yet how beat-to-beat alternans of intracellular Ca2+ transient is produced. In this study investigated the mechanism(s)...
In this paper, we proposed a kernel difference-weighted k-nearest neighbor classifier (KDF-WKNN) for the diagnosis of cardiac arrhythmia based on the standard 12 lead ECG recordings. Different from classical KNN, KDF-WKNN defines the weighted KNN rule as the constrained least-squares optimization of sample reconstruction from its neighborhood, and then uses the Lagrangian multiplier method to compute...
Purkinje fiber (PF) cells exhibit action potential (AP) morphology and duration markedly different to those of ventricle myocytes. In order to study heterogeneity at the Purkinje-ventricular junction (PVJ), we construct a new AP model for the canine PF cell based on detailed experimental data of ion channel characteristics obtained by voltage clamp techniques. Single-cell PF model is incorporated...
The idea of this research is to determine can we tell from the HRV data without paroxysmal atrial fibrillation present at the recording if the patient suffers from this arrhythmia. The benefit is we can provide time and cost effective preliminary screening procedure during short time visit to the clinic. To achieve this goal we used Fourier analysis of the 30 minute HRV segment duration. We found...
The idea of this research is to determine how long in advance can we predict the onset of paroxysmal atrial fibrillation (PAF) from the HRV data. Having established such methods with great confidence it is possible to avert the PAF onset using pacing techniques, thus reliving patient pains.
The electrocardiogram (ECG) is an important index of clinical diagnosis of cardiac arrhythmias. Simulations of ECG had revealed the causative relationship between waveforms of ECG and action potentials (APs). However, those studies were mainly based on the Luo-Rudy (LRd) model or the Priebe-Beuckelman (PB) model. In this study, we developed a ID model of transmural ventricular strand based on the...
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