2 frequency domain analysis of atrial fibrillation

... vector, whose length is L % N: number of frequencies for evaluation over [-pi,pi) % ==> constraint: N >= L % % H: DTFT values (complex) % W: (2nd output) vector of freqs where DTFT is computed % ... simulated analog signal xa % L = length(xa); Nfft = 2.^ceil(log2(L)); % Choose the nearest Power of Xa = fft(xa,Nfft); range = 0:(Nfft/4); % show frequencies up to 1/4 sampling rate ff = range/Nfft/dt/1000; ... x=cos(2*pi*f*t+pi/4) dt=1/fs; L = length(x); Nfft = 2.^ceil(log2(L)); % Choose the nearest Power of Xa = fft(x,Nfft);range = 0:(Nfft/4); % show frequencies up to 1/4 sampling rate ff = range/Nfft/dt/1000;...

Ngày tải lên: 10/08/2016, 11:09

... absolute value of the imaginary part of the LPRS J(ω) is a monotone decreasing function of frequency ω, as the sign of its derivative is negative For the proof of the monotonicity of ReJ(ω), let ... condition of non-existence of periodic motion of finite frequency in a SM system (chattering) is therefore the condition of absence of points of intersection of the LPRS and of the real axis (except ... imperfections of the relay result in the finite frequency of switching and finite amplitude of the oscillations, which is usually referred to as chattering Chattering was the subject of analysis of a number...

Ngày tải lên: 01/07/2015, 09:37

... 0.5π w (b) Figure 3.12 A sequence of impulses in the discrete-time domain and a sequence of impulses in the discrete-frequency domain 132 FREQUENCY -DOMAIN ANALYSIS If we are given a function ... FREQUENCY -DOMAIN ANALYSIS Inverse DTFT of the ideal lowpass filter 0.25 Values of the samples 0.2 0.15 0.1 0.05 −0.05 −0.1 −21 −16 −11 −6 14 19 Value of the index n Figure 3.22 The inverse DTFT of an ... discussed in the next two chapters 3.3.1 Time -Domain Analysis of Noncausal Inputs Let the DTFT of the input signal x(n) and the unit impulse response h(n) of a discrete-time system be X(ej ω ) and...

Ngày tải lên: 29/09/2013, 21:20

... right atrial; RAAFT ¼ Radiofrequency Ablation Atrial Fibrillation Trial; STOP-AF ¼ Sustained Treatment Of Paroxysmal Atrial Fibrillation Online ¼ references available on the dedicated Atrial Fibrillation ... Sotalol, Amiodarone, atrial Fibrillation Efficacy Trial Screening for AF in the Elderly sudden cardiac death Stroke Prevention in Atrial Fibrillation Strategies of Treatment of Atrial Fibrillation ST ... Pharmacological Intervention in Atrial Fibrillation; RACE ¼ RAte Control versus Electrical cardioversion for persistent atrial fibrillation; STAF ¼ Strategies of Treatment of Atrial Fibrillation ectopic...

Ngày tải lên: 08/03/2014, 14:20

... complication of inadequate atrial preservation J Thorac Cardiovasc Surg 1983, 85:105-115 Kolvekar S, D’Souza A, Akhtar P, Reek C, Garratt C, Spyt T: Role of atrial ischemia in development of atrial fibrillation ... alterations of the cardiac structure and electrophysiological profile of the atria due to the surgical atrial trauma itself [5], and ischemic atrial injury [18,19] Koletsis et al Journal of Cardiothoracic ... the atrial septum and atrial wall remain warmer than the wall of the left ventricle [4,21,22] Therefore, the protection of the atrial wall remains relatively inadequate compared to that of the...

Ngày tải lên: 10/08/2014, 09:22

... suffered in 20% of cases of paroxysmal, in 37% of persistent, and in 41% of cases of long standing persistent AF There was no statistical significant correlation in between type of AF and diagnosis ... Preoperative atrial fibrillation and percentage of patients with sinus rhythm postoperatively Paroxysmal atrial fibrillation differs significantly from both persistent and long standing persistent atrial ... strongest predictor of the procedure's failure or success, respectively At a cut-off point of 50 mm failure rate dramatically worsened with an odd ratio of 4.2 The consequences of left atrial enlargement...

Ngày tải lên: 10/08/2014, 09:22

... combination of bipolar radiofrequency and cryothermy We made a lesion set of ablation of atrial fibrillation which was different from that of Gillinov’s technique Our technique consists of a combination ... perform mitral valve, tricuspid valve procedure, atrial septal defect closure, and atrial fibrillation ablation Three patients underwent ablation of atrial fibrillation in minimally invasive mitral ... for the elimination of chronic atrial fibrillation Ann Thorac Surg 2005, 79:521-5 doi:10.1186/1749-8090-5-79 Cite this article as: Izutani et al.: Combined ablation of atrial fibrillation and minimally...

Ngày tải lên: 10/08/2014, 09:22

... the Management of Patients With Atrial Fibrillation) ; North American Society of Pacing and Electrophysiology: ACC/AHA/ESC guidelines for the management of patients with atrial fibrillation: executive ... U; STAF Investigators: Randomized trial of rate-control versus rhythm-control in persistent atrial fibrillation: the Strategies of Treatment of Atrial Fibrillation (STAF) study J Am Coll Cardiol ... recurrence of atrial fibrillation Canadian Trial of Atrial Fibrillation Investigators N Engl J Med 2000, 342:913-920 31 The AFFIRM First Antiarrhythmic Drug Substudy Investigators: Maintenance of sinus...

Ngày tải lên: 12/08/2014, 20:20

... filter h Impulse response of wavelet filter H (ω ) The absolute value of transfer function of {h } n G (ω ) The absolute value of transfer function of{ g } n 10 List of Figures 2.1 Acceleration ... multiresolution analysis (MRA) of L ( R) is defined as a sequence of closed subspaces j of L ( R) with the properties presented above The space as the set of all possible approximations of functions ... and encouragement during my PhD candidature Table of Contents Acknowledgements Table of Contents Summary List of Symbols List of Figures 11 List of Tables 16 17 Introduction 1.1 Background…………………………………………………………………...

Ngày tải lên: 14/09/2015, 18:27

... and treatment of atrial fibrillation in medical intensive care unit patients What is the pathophysiology of atrial fibrillation in medical intensive care unit patients? Does atrial fibrillation ... treatment of atrial fibrillation improve survival? Can (preventive) treatment of atrial fibrillation improve morbidity? Should we aim for rate control or rhythm control? Does atrial fibrillation ... patients with atrial arrhythmias: inflammatory mechanisms and persistence of atrial fibrillation Circulation 2001, 104:2886-2891 31 Falk RH: Etiology and complications of atrial fibrillation: ...

Ngày tải lên: 25/10/2012, 10:35

... the approach of deformation compatibility of beam for the analysis of the beams with large eccentricities by the additional assumption of an imaginary concrete strain at the portion of cable, at ... assumption of slip with friction The same effect of friction at the deviators is also found as in the case of the beams presented in Fig.5.2 Similar predictions of the friction effect on the behavior of ... strength of the beam when the ratio of Ld/L is considerably large However, both the ultimate strength of the beam and increase of cable stress are improvably increased due to the fixity of cable...

Ngày tải lên: 07/11/2012, 11:04

... substitution of recombinant perlecan domain V correlated well with a comparable low rate of modi®cation of two tissue forms of perlecan [44] An extra cysteine (C3 at position 710) in domain b1IV ... levels of laminin c1 chains in EDTA/detergent extracts of various mouse tissues The content of b1 chains in these extracts exceeded the content of b2 by a factor of 5±20 The relative amounts of b2 ... suggests novel folding for domain IV, which can now be investigated by X-ray analysis of recombinant b1IV monomers and dimers Additional differences between domain IV of b1 and b2 chains are related...

Ngày tải lên: 21/02/2014, 03:20

... spectra of the spinophilin ABD constructs 62 (Fig 2C), which enables rapid analysis of the overall secondary structure content of proteins The CD spectra of residues 1–154, 1–221 and 1–305 of spinophilin ... of spinophilin The histograms on the right show a quantitative analysis of the polymer length distributions of actin alone (control, top histogram) or in the presence of an equimolar amount of ... functional analysis of the ABD of spinophilin We show that residues 1–154 of spinophilin are both necessary and sufficient to mediate F-actin binding Critically, we also show that residues 1–154 of spinophilin...

Ngày tải lên: 16/03/2014, 06:20

... cleaves 364-bp upstream of the start codon of qorM, and DraIII, that cleaves 8-bp downstream of the stop codon of qorL After removing the 3¢ overhang and filling the 5¢ overhang of the plasmid with ... Hanes plots Determination of the metal contents of the Qor proteins, and detection of the nucleotide moiety of the molybdenum cofactor The contents of molybdenum and iron were determined by inductively ... identification of the nucleotide moiety of the molybdenum cofactor, the enzymes were incubated at 95 °C for 10 in the presence of sulfuric acid (3%, v/v); hydrolysis leads to the release of nucleotides...

Ngày tải lên: 17/03/2014, 10:20

... acids Those domains are the epimerization domain (E -domain) for Ca-epimerization [15], the methyltransferase domain (M -domain) for N-methylation [16] and the cyclization domain (Cy -domain) [17] ... activity and selectivity of the A domain embedded within the C- and T-domains of all tridomain TycB1ProCAT derivatives Although A domain activity indicates a correct folding of the entire TycB1Pro-CAT ... presentation of the 450-amino-acid C -domain of TycB1Pro-CAT, along with the approximate location of coremotifs C1±7 [3] Underneath, the e€ects of each mutation on solubility and various activities of each...

Ngày tải lên: 17/03/2014, 11:20

... the presence of mm CaCl2 (Table 1), emphasizing the specificity of the effect of Zn2+ Thermal destabilization of PSP-I ⁄ PSP-II was also noticed at acidic pH (Fig 2B) in the absence of Zn2+ cations ... DSC profiles of the thermal denaturation of PSP-I ⁄ PSP-II Effect of Zn2+ (A) and pH (B) The excess heat capacity function (DCp) of PSP-I ⁄ PSP-II was determined at a scanning rate of 20 °CÆh)1 ... et al Fig Effect of incubation of PSP-I ⁄ PSP-II heterodimer with Zn2+ at low protein concentration Gel filtration behaviour (A) and analysis by RP-HPLC (B) of the composition of the fractions...

Ngày tải lên: 23/03/2014, 15:21

... explained in terms of large-scale changes in the potentiometric properties of their cofactors Stopped-flow kinetic analysis of electron transfer Reduction of the wild-type and mutant FAD domains was ... for the multidomain nature of these enzymes has been obtained through the stable expression of domains that bind their cognate cofactors and retain catalytic properties typical of the parental ... [35,37]) In particular, domain dissection has facilitated precise determination of the midpoint reduction potentials of flavin cofactors, and also of the haems in the case of NOS and P450 BM3 In...

Ngày tải lên: 30/03/2014, 14:20

... Biochem 271) Ó FEBS 2004 Ó FEBS 2004 Analysis of ataxins and (Eur J Biochem 271) 3159 Fig 3D model of the Lsm domain of ataxin-2 using three adjacent protomers of the Sm1 protein from P abyssi as ... UBX domain of the membrane fusion adaptor p47/SHP1/EYC/ Ubx3 [85,86,133], which consists of three domains UBASEP-UBX [134] The crystallographically determined complex of the N-terminal adaptor domain ... of a UBX domain with the N-terminal adaptor domain of VCP, but are involved in interactions between protein regions (for details see the online supplement) Therefore, motions of the adaptor domain, ...

Ngày tải lên: 30/03/2014, 15:20