Simulation of two-dimensional anisotropic cardiac reentry: effects of the wavelength on the reentry characteristics.

abstract：:This study evaluates the use of artificial neural networks to estimate stroke volume from pre-processed, thoracic impedance plethysmograph signals from 20 healthy subjects. Standard back-propagation was used to train the networks, with Doppler stroke volume estimates as the desired output. The trained networks were th...

journal_title：Annals of biomedical engineering

authors： Mulavara AP,Timmons WD,Nair MS,Gupta V,Kumar AA,Taylor BC

更新日期：1998-07-01 00:00:00

abstract：:Blunt carotid artery injuries occur in 0.3% of blunt injured patients and may lead to devastating neurological consequences. However, arterial mechanics leading to internal layer subfailure have not been quantified. Twenty-two human carotid artery segments and 18 porcine thoracic aorta segments were opened to expose t...

journal_title：Annals of biomedical engineering

authors： Stemper BD,Yoganandan N,Sinson GP,Gennarelli TA,Stineman MR,Pintar FA

更新日期：2007-02-01 00:00:00

abstract：:Cochlear implantation consists in electrically stimulating the auditory nerve by inserting an electrode array inside the cochlea, a bony structure of the inner ear. In the absence of any visual feedback, the insertion results in many cases of damages of the internal structures. This paper presents a feasibility study ...

journal_title：Annals of biomedical engineering

authors： Lavenir L,Zemiti N,Akkari M,Subsol G,Venail F,Poignet P

更新日期：2020-10-30 00:00:00

abstract：:Finite element analysis is a powerful tool for investigating the biomechanics of atherosclerosis and has thereby provided an improved understanding of acute myocardial infarction. Structural analysis of arterial walls is traditionally performed using geometry contours derived from histology. In this paper we demonstra...

journal_title：Annals of biomedical engineering

authors： Chau AH,Chan RC,Shishkov M,MacNeill B,Iftimia N,Tearney GJ,Kamm RD,Bouma BE,Kaazempur-Mofrad MR

更新日期：2004-11-01 00:00:00

abstract：:Numerical models of the mitral valve have been used to elucidate mitral valve function and mechanics. These models have evolved from simple two-dimensional approximations to complex three-dimensional fully coupled fluid structure interaction models. However, to date these models lack direct one-to-one experimental val...

journal_title：Annals of biomedical engineering

authors： Rabbah JP,Saikrishnan N,Yoganathan AP

更新日期：2013-02-01 00:00:00

abstract：:Hemodynamic parameters play an important role in regulating vascular remodeling in arterio-venous fistula (AVF) maturation. Investigating the changes in hemodynamic parameters during AVF maturation is expected to improve our understanding of fistula failure, but very little data on actual temporal changes in human AVF...

journal_title：Annals of biomedical engineering

authors： Sigovan M,Rayz V,Gasper W,Alley HF,Owens CD,Saloner D

更新日期：2013-04-01 00:00:00

abstract：:Experimental studies have shown that cardiac fibroblasts are electrically inexcitable, but can contribute to electrophysiology of myocardium in various manners. The aim of this computational study was to give insights in the electrophysiological role of fibroblasts and their interaction with myocytes. We developed a m...

journal_title：Annals of biomedical engineering

authors： Sachse FB,Moreno AP,Abildskov JA

更新日期：2008-01-01 00:00:00

abstract：:One of the major functions of the cardiovascular system is to deliver blood to the microcirculation where exchange of mass and energy can take place. In the present article, we will provide an overview of the state-of-the-art computational methods for modeling of red blood cell (RBC) rheology and dynamics in the micro...

journal_title：Annals of biomedical engineering

authors： Cristini V,Kassab GS

更新日期：2005-12-01 00:00:00

abstract：:Arterial responses to diverse pathologies and insults likely occur via similar mechanisms. For example, many studies suggest that the natural process of aging and isolated systolic hypertension share many characteristics in arteries, including loss of functional elastin, decreased smooth muscle tone, and altered rates...

journal_title：Annals of biomedical engineering

authors： Valentín A,Humphrey JD,Holzapfel GA

更新日期：2011-07-01 00:00:00

abstract：:The effects of tissue hydration and fixed charge density on hydraulic permeability and creep behavior of cartilaginous tissues have been investigated using the triphasic theory and finite element methods. The empirical model for hydraulic permeability of uncharged gels and Mackie and Meares (1955) model for ion diffus...

journal_title：Annals of biomedical engineering

authors： Gu WY,Yao H

更新日期：2003-11-01 00:00:00

abstract：:Disease and injury perturb the balance of processes associated with inflammation and tissue remodeling, resulting in positive feedback loops, exacerbation of disease and compromised tissue repair. Conversely, under homeostatic healthy conditions, these processes are tightly regulated through the expansion and/or recru...

journal_title：Annals of biomedical engineering

authors： Glowacki AJ,Gottardi R,Yoshizawa S,Cavalla F,Garlet GP,Sfeir C,Little SR

更新日期：2015-03-01 00:00:00

abstract：:This discussion and review article focuses on the possible use of regenerative techniques applied to the interfaces between skin and medical implants. As is widely known, the area of contact between an implant and the skin--the skin-implant interface--is prone to recurrent and persistent problems originated from the l...

journal_title：Annals of biomedical engineering

authors： Peramo A,Marcelo CL

更新日期：2010-06-01 00:00:00

abstract：:Long-range dependency has been found in most rhythmic motor signals. The origin of this property is unknown and largely debated. There is a controversy on the influence of voluntary control induced by requiring a pre-determined pace such as asking subjects to step to a metronome. We studied the cycle duration variabil...

journal_title：Annals of biomedical engineering

authors： Warlop TB,Bollens B,Crevecoeur F,Detrembleur C,Lejeune TM

更新日期：2013-08-01 00:00:00

abstract：:This study aimed to quantify the elongation patterns of the collateral ligaments following TKA during functional activities of daily living. Using mobile video-fluoroscopy to capture radiographic images of the knee in a group of six patients, each with an ultra-congruent knee implant, tibiofemoral kinematics were reco...

journal_title：Annals of biomedical engineering

authors： Hosseini Nasab SH,Smith CR,Schütz P,Damm P,Trepczynski A,List R,Taylor WR

更新日期：2020-04-01 00:00:00

abstract：:Rod photoreceptors express a unique type of noninactivating potassium channels, Kx channels, which play an important role in setting the dark potential and participate in shaping the light response. Biophysical studies of Kx channels are limited. For example, the effects of a conventional blocker of potassium channels...

journal_title：Annals of biomedical engineering

authors： Liu XD,Kourennyi DE

更新日期：2004-10-01 00:00:00

abstract：:Recent evidence suggests that energy substrate metabolism forms the link between gene expression and contractile function of the heart. This hypothesis draws on three seemingly unconnected observations, made in 1941 by three different investigators. The first gave rise to the concept of the dynamic nature of body cons...

journal_title：Annals of biomedical engineering

authors： Taegtmeyer H

更新日期：2000-08-01 00:00:00

abstract：:Numerous head injury models exist that vary in mesh density by orders of magnitude. A careful study of the mesh convergence behavior is necessary, especially in terms of strain most relevant to brain injury. To this end, as well as to investigate the effect of element integration scheme on simulated strains, we re-mes...

journal_title：Annals of biomedical engineering

authors： Zhao W,Ji S

更新日期：2019-02-01 00:00:00

abstract：:Linear autoregressive (AR) model-based heart rate (HR) spectral analysis has been widely used to study HR dynamics. Owing to system and measurement noise, the parameters of an AR model have intrinsic statistical uncertainty. In this study, we evaluate how this AR parameter uncertainty can translate to uncertainty in H...

journal_title：Annals of biomedical engineering

authors： Christini DJ,Kulkarni A,Rao S,Stutman ER,Bennett FM,Hausdorff JM,Oriol N,Lutchen KR

更新日期：1995-03-01 00:00:00

abstract：:We hypothesize that variations of body anthropometry, conjointly with the bone strength, determine the risk of hip fracture. To test the hypothesis, we compared, in a simulated sideways fall, the hip impact energy to the energy needed to fracture the femur. Ten femurs from elderly donors were tested using a novel drop...

journal_title：Annals of biomedical engineering

authors： Palanca M,Perilli E,Martelli S

更新日期：2020-11-12 00:00:00

abstract：:Extraction of the cardiac surfaces of interest from multi-detector computed tomographic (MDCT) data is a pre-requisite step for cardiac analysis, as well as for image guidance procedures. Most of the existing methods need manual corrections, which is time-consuming. We present a fully automatic segmentation technique ...

journal_title：Annals of biomedical engineering

authors： Antunes S,Esposito A,Palmisano A,Colantoni C,Cerutti S,Rizzo G

更新日期：2016-05-01 00:00:00

abstract：:Static and dynamic components of the stretch reflex were studied in elbow flexors of 13 hemiparetic brain-injured individuals. Constant-velocity joint rotations were applied to the elbow, and the resulting stretch reflex torque and electromyographic responses were recorded in the biceps brachii and brachioradialis mus...

journal_title：Annals of biomedical engineering

authors： Schmit BD,Rymer WZ

更新日期：2001-04-01 00:00:00

abstract：:To meet demands of vascular reconstruction, there is a need for prosthetic alternatives to natural blood vessels. Here we explored a new conduit fabrication approach. Macroporous, gelatin microcarriers laden with human umbilical vein endothelial cells and aortic smooth muscle cells were dispensed into tubular agarose ...

journal_title：Annals of biomedical engineering

authors： Twal WO,Klatt SC,Harikrishnan K,Gerges E,Cooley MA,Trusk TC,Zhou B,Gabr MG,Shazly T,Lessner SM,Markwald RR,Argraves WS

更新日期：2014-07-01 00:00:00

abstract：:Parameters of physiological models are commonly associated in an input-output experiment with a specific pattern of the system response. This association is often made on an intuitive basis by traditional sensitivity analysis, i.e., by inspecting the variations of model output trajectories with respect to parameter va...

journal_title：Annals of biomedical engineering

authors： Thomaseth K,Cobelli C

更新日期：1999-09-01 00:00:00

abstract：:Tendon stem cells (TSCs) may be used to effectively repair or regenerate injured tendons. However, the fates of TSCs once implanted in vivo remain unclear. This study was aimed to determine the feasibility of labeling TSCs with super-paramagnetic iron oxide (SPIO) nano-particles to track TSCs in vivo using MRI. Rabbit...

journal_title：Annals of biomedical engineering

authors： Yang Y,Zhang J,Qian Y,Dong S,Huang H,Boada FE,Fu FH,Wang JH

更新日期：2013-10-01 00:00:00

abstract：:Literature review articles provide a valuable mechanism for remaining informed amidst an ever-increasing body of scientific work. Condensing current advances into this disseminatable form is a critical activity for any research trainee. To systematize this multifaceted process, we present the "why, when, who, what, ho...

journal_title：Annals of biomedical engineering

authors： Koons GL,Schenke-Layland K,Mikos AG

更新日期：2019-11-01 00:00:00

abstract：:Current efforts to evaluate the performance of laparoscopic arterial fusion devices are limited to costly, time consuming, empirical studies. Thus, a finite element (FE) model, with the ability to predict device performance would improve device design and reduce development time and costs. This study introduces a mode...

journal_title：Annals of biomedical engineering

authors： Fankell DP,Kramer E,Cezo J,Taylor KD,Ferguson VL,Rentschler ME

更新日期：2016-11-01 00:00:00

abstract：:High-frequency ventilation (HFV) has not one but several histories. Proceeding along largely independent pathways are techniques using frequencies of 1-5 Hz and techniques using 10-40 Hz, the former being introduced by Sjostrand in 1971, the latter by Lunkenheimer in 1972. It was nearly ten years before it was recogni...

journal_title：Annals of biomedical engineering

authors： Bryan AC

更新日期：1984-01-01 00:00:00

abstract：:A mathematical model of heat, water and soluble gas exchange in the airways and alveoli was used to predict the location of soluble gas exchange in the lung. A previously published model of heat, water and soluble gas exchange in the airways was improved by incorporating anatomical data on the airway wall to better de...

journal_title：Annals of biomedical engineering

authors： Anderson JC,Babb AL,Hlastala MP

更新日期：2003-12-01 00:00:00

abstract：:Diabetic retinopathy is the leading cause of blindness in working age individuals in the United States. Breakdown of the blood-retinal barrier is one of the earliest events in the progression of diabetic retinopathy. Ideally, therapeutic measures would be directed at this early stage, but there are few sensitive, quan...

journal_title：Annals of biomedical engineering

authors： Russ PK,Gaylord GM,Haselton FR

更新日期：2001-08-01 00:00:00

abstract：:Osteoarthritis (OA) is a progressive, degenerative disease of articulating joints that not only affects the elderly, but also involves younger, more active individuals with prolonged participation in high physical-demand activities. Thus, effective therapies that are easy to adopt clinically are critical in limiting t...

journal_title：Annals of biomedical engineering

authors： Holyoak DT,Tian YF,van der Meulen MC,Singh A

更新日期：2016-06-01 00:00:00