نتایج جستجو برای: vf control method

تعداد نتایج: 2793122  

2012
Shijie Zhou

In this paper, a novel, and computationally fast method was proposed to classify ventricular tachycardia (VT) and ventricular fibrillation (VF) by using histogram and average absolute deviation. To begin with, a time-domain method based histogram, was addressed to refine the general features that illustrate the density of amplitude distribution of a window length long ECG signal in successive n...

2005
Hideo Kusuoka V. P. Chacko Eduardo Marban

Ventricular fibrillation (VF) is known to produce alterations in myocardial energetics, but the mechanism of these changes remains unclear. To investigate energy metabolism during VF, phosphorus nuclear magnetic resonance spectroscopy and magnetization transfer were applied to isolated perfused ferret hearts. VF was induced either by perfusion with digitalis (strophanthidin, 30 gM) or by high-f...

Journal: :Investigative ophthalmology & visual science 2018
Shonraj Ballae Ganeshrao Andrew Turpin Allison M McKendrick

Purpose Current perimeters use fixed grid patterns. We test whether a grid based on an individual's retinal nerve fiber layer (RNFL) thickness profile would find more visual field (VF) defects. Methods We describe the defect-based method for choosing test locations. First, the 26 VF locations with the highest positive predictive value to detect glaucoma from the 24-2 pattern are chosen. An ad...

2016
QINGFANG MENG DELING XIA QIANG ZHANG ZAIGUO ZHANG Qingfang Meng Deling Xia Qiang Zhang Zaiguo Zhang

Detection of ventricular tachycardia (VT) and ventricular fibrillation (VF) is crucial for the success of saving the patient’s life. The complexity of the heart signals has changed significantly when the heart state switches. In this study we proposed a novel method for detection of ventricular fibrillation (VF) and ventricular tachycardia (VT), based upon the Lempel-Ziv complexity and Wavelet ...

Journal: :Journal of applied physiology 2007
Sufen Wang Jeejabai Radhakrishnan Iyad M Ayoub Julieta D Kolarova Domenico M Taglieri Raúl J Gazmuri

BACKGROUND intracellular Na+ accumulation during ischemia and reperfusion leads to cytosolic Ca2+ overload through reverse-mode operation of the sarcolemmal Na+ -Ca2+ exchanger. Cytosolic Ca2+ accumulation promotes mitochondrial Ca2+ (Ca2+ m) overload, leading to mitochondrial injury. We investigated whether limiting sarcolemmal Na+ entry during resuscitation from ventricular fibrillation (VF) ...

2017
Atsushi Terakado Sumihisa Orita Kazuhide Inage Go Kubota Tomohiro Kanzaki Hiroshi Mori Yuji Shinohara Junichi Nakamura Yusuke Matsuura Yasuchika Aoki Takeo Furuya Masao Koda Seiji Ohtori

BACKGROUND Elderly female patients complaints of acute low back pain (LBP) may involve vertebral fracture (VF), among which occult VF (OVF: early-stage VF without any morphological change) is often missed to be detected by primary X-ray examination. The current study aimed to investigate the prevalence of VF and OVF and the diagnostic accuracy of the initial X-ray in detecting OVF. METHOD Sub...

2015
Lei Zuo Haidong Zou Jianhong Zhang Xinfeng Fei Xun Xu

This cross-sectional study evaluated VRQOL in Chinese glaucoma patients and the potential factors influencing VRQOL. The VRQOL was assessed using the Chinese-version low vision quality of life questionnaire. Visual field loss was classified by the Hodapp-Parrish-Anderson method. The correlations of VRQOL to the best corrected visual acuity and the VF loss were investigated. The potential impact...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس 1389

abstract: country’s fiber optic network, as one of the most important communication infrastructures, is of high importance; therefore, ensuring security of the network and its data is essential. no remarkable research has been done on assessing security of the country’s fiber optic network. besides, according to an official statistics released by ertebatat zirsakht company, unwanted disconnec...

2010
L. L. Ross E. Rouse P. Gerondelis E. DeJesus C. Cohen J. Horton B. Ha E. R. Lanier R. Elion

BACKGROUND HIV clonal genotypic analysis (CG) was used to investigate whether a more sensitive analysis method would detect additional low-abundance mutations compared with population genotyping (PG) in antiretroviral-naive patients who experienced virological failure (VF) during treatment with abacavir/lamivudine/zidovudine and tenofovir. METHODS HIV was analysed by PG and CG (771 baseline a...

Journal: :Circulation 1974

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