In vivo analysis of aortic valve dynamics by transesophageal 3-dimensional echocardiography with high temporal resolution

Handke, Michael; Heinrichs, Gudrun; Beyersdorf, Friedhelm; Olschewski, Manfred; Bode, Christoph; Geibel, Annette

doi:10.1016/s0022-5223(02)73604-0

Cited by 48 publications

(42 citation statements)

References 40 publications

(72 reference statements)

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“…The VENC PC sequence is an established and non-invasive tool used to quantify the velocity and blood flow based on the accumulated phase of moving protons [14,15]. Previous studies have manually assessed AVA on cine sequences and used in-house or customized software to assess hemodynamic parameters from a VENC PC sequence in valvular stenosis [3,8,[16][17][18].…”

Section: Discussionmentioning

confidence: 99%

Semiautomated Analysis of Aortic Stenosis Parameters on Velocity-Encoded Phase-Contrast MR Images in Patients with Severe Aortic Stenosis: A Comparison with Echocardiography

Bak

Kim

Park

et al. 2017

Cardiovasc Imaging Asia

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Section: Discussionmentioning

confidence: 99%

Semiautomated Analysis of Aortic Stenosis Parameters on Velocity-Encoded Phase-Contrast MR Images in Patients with Severe Aortic Stenosis: A Comparison with Echocardiography

Bak

Kim

Park

et al. 2017

Cardiovasc Imaging Asia

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“…Cardiac catheterization can be used to examine the valve for calcification or other defects (Bonow et al 2006). Valve disease is most commonly evaluated by chest echocardiograph (Handke et al 2003;Otto 2006), which allows measurements of fluid motion and valve geometry that can be compared to various indices for valve disease (Antonini-Canterin et al 1999;Garcia et al 2000;Blais et al 2001;Antonini-Canterin et al 2002;VanAuker 2006).…”

Section: Organ-scalementioning

confidence: 99%

On the multiscale modeling of heart valve biomechanics in health and disease

Weinberg

Shahmirzadi

Mofrad

2010

Biomech Model Mechanobiol

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Theoretical models of the human heart valves are useful tools for understanding and characterizing the dynamics of healthy and diseased valves. Enabled by advances in numerical modeling and in a range of disciplines within experimental biomechanics, recent models of the heart valves have become increasingly comprehensive and accurate. In this paper, we first review the fundamentals of native heart valve physiology, composition and mechanics in health and disease. We will then furnish an overview of the development of theoretical and experimental methods in modeling heart valve biomechanics over the past three decades. Next, we will emphasize the necessity of using multiscale modeling approaches in order to provide a comprehensive description of heart valve biomechanics able to capture general heart valve behavior. Finally, we will offer an outlook for the future of valve multiscale modeling, the potential directions for further developments and the challenges involved.

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Section: New Perspectives For 3d Echocardiographymentioning

confidence: 99%

“…This opened new possibilities for 3D echocardiographic analysis of cardiac dynamics. 7,8 An alternative procedure is 3D echocardiography with phased-array real-time volumetric systems (RT3DE). 6 RT3DE enables rapid data acquisition during a cardiac cycle, and the latest developments also enable real-time generation of the 3D image.…”

mentioning

confidence: 99%

“…10,11 In a recent study (using a system with a 50-Hz image rate), we could show for the first time in addition to the normal function how aortic valve movement is influenced by myocardial and valvular factors. 8 The further increase in frame rate to 168 Hz especially improves diagnosis with respect to the short phase of valve opening, which occurs at a high speed.A new 3D system with a high frame rate can thus contribute to improved understanding of aortic valve function. Possible clinical applications are analyses of the function of aortic valve bioprostheses, diagnostics of valve function after valve-preserving surgery, or examinations of function and progression of stenosed aortic valves.…”

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confidence: 99%

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New Three-Dimensional Echocardiographic System Using Digital Radiofrequency Data—Visualization and Quantitative Analysis of Aortic Valve Dynamics With High Resolution

Handke

Jahnke²,

Heinrichs³

et al. 2003

Circulation

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Background-Common 3D systems have only limited spatial and temporal resolution (frame rate of 25 Hz). Thin structures such as cardiac valves are not imaged exactly; rapid movement patterns cannot be precisely recorded. The objective of the present project was to achieve radiofrequency (RF) data transmission to the 3D workstation to improve image resolution. Methods and Results-A commercially available echocardiographic system (5-MHz transesophageal echocardiography probe) with an integrated raw data interface enables transmission of RF data (up to 40 megabytes per second). A 3D data set may contain up to 3 gigabytes, so that all of the high-resolution ultrasound information of the 2D image is available. Frame rates of up to 168 Hz result in temporal resolution 6 times that of standard 3D systems. The applicability of the system and the image quality were tested in 10 patients. The structure of the aortic valve and the dynamic changes were depicted by volume rendering. The changes in the orifice areas were measured in frame-by-frame planimetry. The mean number of frames recorded per cardiac cycle was 122Ϯ16. The improved structural resolution enabled a detailed imaging of the morphology of the aortic cusps. The rapid systolic movement patterns were recorded with up to 51 frames. The high number of frames enabled creation of precise area-time diagrams. Thus, the individual phases of aortic valve movement (rapid opening, slow valve closing, and rapid valve closing) could be analyzed quantitatively. Key Words: echocardiography, 3D Ⅲ valve, aortic Ⅲ imaging T he impetus for the technical development of 3D echocardiography was its greater diagnostic potential than that of 2D examinations. 1,2 The spatial imaging of cardiac structures is especially important in the planning and performance of surgical and catheter interventional procedures. 3,4 In addition, new possibilities of quantitative analysis, such as the determination of ventricular size and function, are also offered. 5,6 Establishing 3D echocardiography as a clinical routine procedure requires, however, further technical improvements in spatial and temporal image resolution. Conclusion-The rationale for the technical realization of radiofrequency (RF) data transmission from the ultrasound unit to the 3D workstation via a raw data interface is the attendant considerable improvement in spatial and temporal image resolution. In this article, we present a system in which the frame rate has been increased 6 times to 168 Hz. Practical applicability and image quality of the system were tested under clinical conditions. Methods Data Acquisition SetupThe investigations were performed using a PowerVision 6000 ultrasound system (Toshiba Corp) equipped with a 5-MHz multiplane transesophageal echocardiography (TEE) probe and a digital RF data output. A 3D system with modified Echo-Scan software (TomTec GmbH) was used as a control unit. RF data were acquired at a data rate of 40 megabytes per second using a parallel input/ output interface. RF data were directly transmitte...

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In vivo analysis of aortic valve dynamics by transesophageal 3-dimensional echocardiography with high temporal resolution

Abstract: Rapid aortic valve movement can be recorded by 3-dimensional echocardiography and analyzed quantitatively. Time and velocity indices of valve dynamics are influenced by valvular and myocardial factors. A comparable in vivo analysis is not possible with any other imaging procedure.

Cited by 48 publications

References 40 publications

Semiautomated Analysis of Aortic Stenosis Parameters on Velocity-Encoded Phase-Contrast MR Images in Patients with Severe Aortic Stenosis: A Comparison with Echocardiography

Semiautomated Analysis of Aortic Stenosis Parameters on Velocity-Encoded Phase-Contrast MR Images in Patients with Severe Aortic Stenosis: A Comparison with Echocardiography

On the multiscale modeling of heart valve biomechanics in health and disease

New Three-Dimensional Echocardiographic System Using Digital Radiofrequency Data—Visualization and Quantitative Analysis of Aortic Valve Dynamics With High Resolution

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