In vitro temperature map of cardiac ablation demonstrates the effect of flow on lesion development.

Abstract:

:This paper presents an in vitro temperature mapping study of bovine cardiac tissue during radiofrequency ablation. The objectives were to: (i) develop a technique for measuring the spatial and temporal temperature distribution in the tissue and in the blood during ablation, and (ii) use the temperature measurements to characterize the effects of fluid flow on lesion dimensions, ablation efficiency, and temperature distributions. In vitro ablation (20 W, 60 s) of bovine cardiac tissue was performed. The tissue was placed in a saline-dextrose solution maintained at 37+/- 0.5 degrees C. The solution also irrigated the tissue surface and simulated blood flow velocities of (i) 30, (ii) 55, and (iii) 85 mm/s. Thermocouple measurements were recorded from 25 and 2 locations in the tissue and in the fluid, respectively. The lowest flow resulted in the largest lesion, the maximum tissue, fluid, and electrode temperature increases, and the highest ablation efficiency. The lesions were 5.8 +/- 0.81, 4.8 +/- 0.84, and 4.4 +/- 1.25 mm deep, and 9.3 +/- 1.07, 7.9 +/- 1.48, and 7.8 +/- 1.27 mm wide for flows (i)-(iii), respectively. The blood and tissue temperature distributions were asymmetric around the ablating electrode axis with higher temperatures on the outflow than on the inflow side. The experimental measurements were used to validate a numeric model of ablation in an accompanying paper.

journal_name

Ann Biomed Eng

authors

Jain MK,Wolf PD

doi

10.1114/1.1310218

subject

Has Abstract

pub_date

2000-09-01 00:00:00

pages

1066-74

issue

9

eissn

0090-6964

issn

1573-9686

journal_volume

28

pub_type

杂志文章
  • The effect of ultrasonic frequency upon enhanced killing of P. aeruginosa biofilms.

    abstract::It is widely recognized that the bacteria sequestered in a biofilm on a medical implant are much more resistant to antibiotics than their planktonic counterparts. Recent studies have shown that application of antibiotic along with low power ultrasound significantly increases the killing of planktonic bacteria by the a...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/BF02738539

    authors: Qian Z,Sagers RD,Pitt WG

    更新日期:1997-01-01 00:00:00

  • A Battery-Powered Ankle Exoskeleton Improves Gait Mechanics in a Feasibility Study of Individuals with Cerebral Palsy.

    abstract::Neuromuscular impairment associated with cerebral palsy (CP) often leads to life-long walking deficits. Our goal was to evaluate the ability of a novel untethered wearable ankle exoskeleton to reduce the severity of gait pathology from CP. In this clinical feasibility study of five individuals with CP, we used instrum...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-019-02237-w

    authors: Lerner ZF,Harvey TA,Lawson JL

    更新日期:2019-06-01 00:00:00

  • Sustained Efficacy and Arterial Drug Retention by a Fast Drug Eluting Cross-Linked Fatty Acid Coronary Stent Coating.

    abstract::The long held assumption that sustained drug elution from stent coatings over weeks to months is imperative for clinical efficacy has limited the choice for stent coating materials. We developed and evaluated an omega-3 fatty acid (O3FA) based stent coating that is 85% absorbed and elutes 97% of its Sirolimus analog (...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-015-1435-z

    authors: Artzi N,Tzafriri AR,Faucher KM,Moodie G,Albergo T,Conroy S,Corbeil S,Martakos P,Virmani R,Edelman ER

    更新日期:2016-02-01 00:00:00

  • Electrospinning of nanocomposite fibrillar tubular and flat scaffolds with controlled fiber orientation.

    abstract::Electrospinning was used in innovative electrospinning rigs to obtain tubular and flat fibrous structures with controlled fiber orientation with the aim to be used as scaffolds for biomedical applications, more specifically in the tissue engineering of vascular and orthopedic grafts. Gelatine and hydroxyapatite (HA)-g...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-011-0350-1

    authors: Salifu AA,Nury BD,Lekakou C

    更新日期:2011-10-01 00:00:00

  • Microfluidics for mammalian cell chemotaxis.

    abstract::The emerging field of micro-technology has opened up new possibilities for exploring cellular chemotaxis in real space and time, and at single cell resolution. Chemotactic cells sense and move in response to chemical gradients and play important roles in a number of physiological and pathological processes, including ...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章,评审

    doi:10.1007/s10439-011-0489-9

    authors: Kim BJ,Wu M

    更新日期:2012-06-01 00:00:00

  • Impedances of thin and layered systems: cells with even or odd numbers of interfaces.

    abstract::Impedance data, e.g., system responses, from perturbing small amplitude applied sinusoid signals of near DC to high kilohertz frequencies, give chemical information. Analysis of frequency-dependent imaginary and real impedance proceeds from equivalent analog circuit elements to chemical and physical significance deter...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/BF02368537

    authors: Buck RP

    更新日期:1992-01-01 00:00:00

  • An ex vivo study of the biological properties of porcine aortic valves in response to circumferential cyclic stretch.

    abstract::Normal physiological mechanical forces cause constant tissue renewal in aortic valve leaflets (AVL) while altered mechanical forces incite changes in their structural and biological properties. The current study aims at characterizing the remodeling properties of AVL subjected to cyclic circumferential stretch in a st...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-006-9167-8

    authors: Balachandran K,Konduri S,Sucosky P,Jo H,Yoganathan AP

    更新日期:2006-11-01 00:00:00

  • How crouch gait can dynamically induce stiff-knee gait.

    abstract::Children with cerebral palsy frequently experience foot dragging and tripping during walking due to a lack of adequate knee flexion in swing (stiff-knee gait). Stiff-knee gait is often accompanied by an overly flexed knee during stance (crouch gait). Studies on stiff-knee gait have mostly focused on excessive knee mus...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-010-9952-2

    authors: van der Krogt MM,Bregman DJ,Wisse M,Doorenbosch CA,Harlaar J,Collins SH

    更新日期:2010-04-01 00:00:00

  • The Impact of Anti-tumor Agents on ER-Positive MCF-7 and HER2-Positive SKBR-3 Breast Cancer Cells Biomechanics.

    abstract::Studying human cancer from a biomechanical perspective may contribute to pathogenesis understanding which leads to the malignancy. In this study, biomechanics of suspended and adhered breast cancer cells were investigated via the micropipette aspiration method with special emphasis on comparing the cell stiffness and ...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-019-02284-3

    authors: Metsiou DN,Siatis KE,Giannopoulou E,Papachristou DJ,Kalofonos HP,Koutras A,Athanassiou G

    更新日期:2019-08-01 00:00:00

  • Novel Balloon Surface Scanning Device for Intraoperative Breast Endomicroscopy.

    abstract::Recent advances in fluorescence confocal endomicroscopy have allowed real-time identification of residual tumour cells on the walls of the cavity left by breast conserving surgery. However, it is difficult to systematically survey the surgical site because of the small imaging field-of-view of these probes, compounded...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-015-1493-2

    authors: Zuo S,Hughes M,Yang GZ

    更新日期:2016-07-01 00:00:00

  • Parameter estimation for linear compartmental models--a sensitivity analysis approach.

    abstract::Linear compartmental models are useful, explanatory tools, that have been widely used to represent the dynamic behavior of complex biological systems. This paper addresses the problem of the numerical identification of such models, i.e., the estimation of the parameter values that will generate predictions closest to ...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-009-9651-z

    authors: Juillet B,Bos C,Gaudichon C,Tomé D,Fouillet H

    更新日期:2009-05-01 00:00:00

  • Measurement of signal and noise characteristics in ongoing auditory brainstem response averaging.

    abstract::Although diagnostic testing with auditory evoked potentials (EPs) has become routine, quantitative measurements of signal and noise are still lacking. In this study, current signal, power, noise power, and signal-to-noise ratio (SNR) estimation formulas are reviewed and applied to auditory brainstem response averaging...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/BF02684183

    authors: Ozdamar O,Delgado RE

    更新日期:1996-11-01 00:00:00

  • Tissue remodeling of rat pulmonary artery in hypoxic breathing. II. Course of change of mechanical properties.

    abstract::When cells and the matrix of a tissue remodel, the mechanical properties of the tissue do change. The mechanical properties are expressed by constitutive equations. In this article the remodeling of the constitutive equation of the pulmonary artery is studied. The remodeling was induced in a rat breathing a gas whose ...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1114/1.1380417

    authors: Huang W,Delgado-West D,Wu JT,Fung YC

    更新日期:2001-01-01 00:00:00

  • Native, living tissues as cell seeded scaffolds.

    abstract::Much effort is expended in developing biomimetic scaffolds that provide the micro-architecture of native tissue with appropriate cellular niches. Such scaffolds are often seeded with progenitor cells to generate engineered replacements for diseased or damaged tissues. An alternative approach relies on biology, rather ...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章,评审

    doi:10.1007/s10439-014-1174-6

    authors: Evans CH

    更新日期:2015-03-01 00:00:00

  • Flow perfusion culture of marrow stromal cells seeded on porous biphasic calcium phosphate ceramics.

    abstract::Calcium phosphate ceramics have been widely used for filling bone defects to aid in the regeneration of new bone tissue. Addition of osteogenic cells to porous ceramic scaffolds may accelerate the bone repair process. This study demonstrates the feasibility of culturing marrow stromal cells (MSCs) on porous biphasic c...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-005-5536-y

    authors: Holtorf HL,Sheffield TL,Ambrose CG,Jansen JA,Mikos AG

    更新日期:2005-09-01 00:00:00

  • Monitoring Bone Tissue Engineered (BTE) Constructs Based on the Shifting Metabolism of Differentiating Stem Cells.

    abstract::Ever-increasing demand for bone grafts necessitates the realization of clinical implementation of bone tissue engineered constructs. The predominant hurdle to implementation remains to be securing FDA approval, based on the lack of viable methods for the rigorous monitoring of said constructs. The study presented here...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-017-1937-y

    authors: Simmons AD,Sikavitsas VI

    更新日期:2018-01-01 00:00:00

  • The Application of Digital Volume Correlation (DVC) to Evaluate Strain Predictions Generated by Finite Element Models of the Osteoarthritic Humeral Head.

    abstract::Continuum-level finite element models (FEMs) of the humerus offer the ability to evaluate joint replacement designs preclinically; however, experimental validation of these models is critical to ensure accuracy. The objective of the current study was to quantify experimental full-field strain magnitudes within osteoar...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-020-02549-2

    authors: Kusins J,Knowles N,Columbus M,Oliviero S,Dall'Ara E,Athwal GS,Ferreira LM

    更新日期:2020-12-01 00:00:00

  • Digital processing of the current noise evoked by kainate in cerebellar granule cells.

    abstract::Current induced in cultured cerebellar granule cells by the bath application of kainate (500 microM) was measured using the conventional patch-clamp technique. Two different kinds of responses were observed after the agonist perfusion. Some cells exhibited small inward whole-cell currents: 116 +/- 40 pA (7 cells) at a...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/BF02684186

    authors: Cavalcanti S,Zona C

    更新日期:1997-05-01 00:00:00

  • The effect of blood flow on the material properties of bone.

    abstract::This project was undertaken to establish if the integral circulation had any effects upon the mechanical behavior of bone. The influence of blood flow in the rabbit tibia on the strain induced at the bone surface when under load was assessed. Recordings were taken from three adult and three immature New Zealand White ...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/BF02390377

    authors: McDonald F,Pitt Ford TR

    更新日期:1994-03-01 00:00:00

  • An optimization algorithm for human joint angle time-history generation using external force data.

    abstract::A mathematical model is presented that estimates joint kinematics and kinetics using measured external resultant loads and readily available parameters. The musculo-skeletal system was represented by a planar three degrees of freedom open kinematic chain. Information extraction was limited to the flexion-extension fun...

    journal_title:Annals of biomedical engineering

    pub_type: 临床试验,杂志文章

    doi:10.1023/b:abme.0000030241.26857.75

    authors: Mazzà C,Cappozzo A

    更新日期:2004-05-01 00:00:00

  • HFUS Imaging of the Cochlea: A Feasibility Study for Anatomical Identification by Registration with MicroCT.

    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

    pub_type: 杂志文章

    doi:10.1007/s10439-020-02671-1

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

    更新日期:2020-10-30 00:00:00

  • A Conceivable Mechanism Responsible for the Synergy of High and Low Voltage Irreversible Electroporation Pulses.

    abstract::Irreversible electroporation (IRE), is a new non-thermal tissue ablation technology in which brief high electric field pulses are delivered across the target tissue to induce cell death by irreversible permeabilization of the cell membrane. A deficiency of conventional IRE is that the ablation zone is relatively small...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-019-02258-5

    authors: Lv Y,Yao C,Rubinsky B

    更新日期:2019-07-01 00:00:00

  • Delayed activation and retrograde propagation in cardiac muscle: implication of virtual electrode effects.

    abstract::Point cathodal stimulation of cardiac tissue was shown previously to produce both a dog-bone shaped virtual cathode transverse to the muscle fibers and two longitudinal virtual anodes. We hypothesize that virtual anodes can cause a region of delayed activation, separating two regions of early activation caused by the ...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1114/1.1326029

    authors: Wu J,Roden DM,Wikswo JP Jr

    更新日期:2000-11-01 00:00:00

  • The Impact of Fluid Inertia on In Vivo Estimation of Mitral Valve Leaflet Constitutive Properties and Mechanics.

    abstract::We examine the influence of the added mass effect (fluid inertia) on mitral valve leaflet stress during isovolumetric phases. To study this effect, oscillating flow is applied to a flexible membrane at various frequencies to control inertia. Resulting membrane strain is calculated through a three-dimensional reconstru...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-015-1463-8

    authors: Bark DL Jr,Dasi LP

    更新日期:2016-05-01 00:00:00

  • Left ventricular external constraint: relationship between pericardial, pleural and esophageal pressures during positive end-expiratory pressure and volume loading in dogs.

    abstract::Left ventricular (LV) diastolic filling is limited by the constraining effects exerted by the pericardium (PE) and the lung/chest wall. The aim of the present study was to assess the validity of various estimates of external cardiac constraint, compared to pericardial surface pressure (Ppe) measured lateral to the LV ...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/BF02584288

    authors: Kingma I,Smiseth OA,Frais MA,Smith ER,Tyberg JV

    更新日期:1987-01-01 00:00:00

  • Lensfree optofluidic microscopy and tomography.

    abstract::Microfluidic devices aim at miniaturizing, automating, and lowering the cost of chemical and biological sample manipulation and detection, hence creating new opportunities for lab-on-a-chip platforms. Recently, optofluidic devices have also emerged where optics is used to enhance the functionality and the performance ...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章,评审

    doi:10.1007/s10439-011-0385-3

    authors: Bishara W,Isikman SO,Ozcan A

    更新日期:2012-02-01 00:00:00

  • Redirection of neurite outgrowth by coupling chondroitin sulfate proteoglycans to polymer membranes.

    abstract::Upon nerve injury, the body creates an environment consisting of permissive and non-permissive cues that instruct the function of cells involved in nerve repair. Among other roles, the developing extracellular matrix (ECM) acts as an underlying substrate to guide the union of neurites extending from the proximal stump...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-014-0991-y

    authors: Man AJ,Leach JK,Bannerman P

    更新日期:2014-06-01 00:00:00

  • High fidelity virtual stenting (HiFiVS) for intracranial aneurysm flow diversion: in vitro and in silico.

    abstract::A flow diverter (FD) is a flexible, densely braided stent-mesh device placed endoluminally across an intracranial aneurysm to induce its thrombotic occlusion. FD treatment planning using computational virtual stenting and flow simulation requires accurate representation of the expanded FD geometry. We have recently de...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-013-0808-4

    authors: Ma D,Dumont TM,Kosukegawa H,Ohta M,Yang X,Siddiqui AH,Meng H

    更新日期:2013-10-01 00:00:00

  • Development of a device for measuring adherence of skin grafts to the wound surface.

    abstract::Adherence of a biological graft to the wound surface is the most important factor influencing the ultimate success of graft viability. A machine has been developed to test the adherence of biological graft materials to a substrate such as a wound surface. The peeling mode, which yields reproducible quantitative measur...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/BF02368164

    authors: Dong C,Mead E,Skalak R,Fung YC,Debes JC,Zapata-Sirvent RL,Andree C,Greenleaf G,Cooper M,Hansbrough JF

    更新日期:1993-01-01 00:00:00

  • Estimation of Reynolds shear stresses during pulsatile flow in the region of aortic valves.

    abstract::Some investigators have attempted to estimate the Reynolds shear stress on the basis of a single component of velocity. The purpose of this investigation is to determine the validity of such estimates in a complex flow field, such as occurs in the cardiovascular system in the region of the aortic valve. Turbulent velo...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/BF02371247

    authors: Walburn FJ,Sabbah HN,Stein PD

    更新日期:1985-01-01 00:00:00