keyword
MENU ▼
Read by QxMD icon Read
search

3D transesophageal mitral valve

keyword
https://www.readbyqxmd.com/read/27876001/severe-mitral-regurgitation-due-to-mitral-leaflet-aneurysm-diagnosed-by-three-dimensional-transesophageal-echocardiography-a-case-report
#1
Takao Konishi, Naohiro Funayama, Tadashi Yamamoto, Daisuke Hotta, Kenjiro Kikuchi, Katsumi Ohori, Hiroshi Nishihara, Shinya Tanaka
BACKGROUND: A small mitral valve aneurysm (MVA) presenting as severe mitral regurgitation (MR) is uncommon. CASE PRESENTATION: A 47-year-old man with a history of hypertension complained of exertional chest discomfort. A transthoracic echocardiogram (TTE) revealed the presence of MR and prolapse of the posterior leaflet. A 6-mm in diameter MVA, not clearly visualized by TTE, was detected on the posterior leaflet on a three-dimensional (3D) transesophageal echocardiography (TEE)...
November 22, 2016: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/27866678/patient-specific-cfd-models-for-intraventricular-flow-analysis-from-3d-ultrasound-imaging-comparison-of-three-clinical-cases
#2
A M Bavo, A M Pouch, J Degroote, J Vierendeels, J H Gorman, R C Gorman, P Segers
BACKGROUND: As the intracardiac flow field is affected by changes in shape and motility of the heart, intraventricular flow features can provide diagnostic indications. Ventricular flow patterns differ depending on the cardiac condition and the exploration of different clinical cases can provide insights into how flow fields alter in different pathologies. METHODS: In this study, we applied a patient-specific computational fluid dynamics model of the left ventricle and mitral valve, with prescribed moving boundaries based on transesophageal ultrasound images for three cardiac pathologies, to verify the abnormal flow patterns in impaired hearts...
November 11, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/27863908/role-of-echocardiography-for-catheter-based-management-of-valvular-heart-disease
#3
REVIEW
Takahiro Shiota
Catheter-based treatment of valvular heart disease, such as transvalvular aortic valve replacement (TAVR) or mitral clip procedure, has been increasingly accepted as a treatment choice for the past several years. Such new treatment options have been changing the management of patients with valvular heart disease drastically while socio-economic factors regarding their application need to be taken into consideration. The use of echocardiography, including transesophageal echocardiography (TEE), for such catheter-based treatments is essential for the success of the procedures...
November 15, 2016: Journal of Cardiology
https://www.readbyqxmd.com/read/27718462/towards-patient-specific-modeling-of-mitral-valve-repair-3d-transesophageal-echocardiography-derived-parameter-estimation
#4
Fan Zhang, Jingjing Kanik, Tommaso Mansi, Ingmar Voigt, Puneet Sharma, Razvan Ioan Ionasec, Lakshman Subrahmanyan, Ben A Lin, Lissa Sugeng, David Yuh, Dorin Comaniciu, James Duncan
Transesophageal echocardiography (TEE) is routinely used to provide important qualitative and quantitative information regarding mitral regurgitation. Contemporary planning of surgical mitral valve repair, however, still relies heavily upon subjective predictions based on experience and intuition. While patient-specific mitral valve modeling holds promise, its effectiveness is limited by assumptions that must be made about constitutive material properties. In this paper, we propose and develop a semi-automated framework that combines machine learning image analysis with geometrical and biomechanical models to build a patient-specific mitral valve representation that incorporates image-derived material properties...
September 27, 2016: Medical Image Analysis
https://www.readbyqxmd.com/read/27714712/-transapical-off-pump-mitral-valve-repair-first-experience-in-poland-with-neochord-system-presentation-of-2-cases
#5
Krzysztof Wróbel, Katarzyna Kurnicka, Marcin Zygier, Wojciech Dyk, Ryszard Wojdyga, Dariusz Zieliński, Małgorzata Jarzębska, Zbigniew Juraszyński, Barbara Lichodziejewska, Piotr Pruszczyk, Andrzej Biederman, Giovanni Speziali, Uwe Kasten
BACKGROUND AND AIM: Artificial chordal implantation in order to repair flail or prolapse mitral valve leaflet requires open heart surgery and cardiopulmonary bypass. Transapical off-pump implantation of neochordae is a new surgical technique proposed to treat degenerative mitral valve regurgitation. The procedure is performed using the NeoChord DS1000 system (NeoChord, Inc., Eden Praire, MN), which facilitates both implantation and tension adjustment of the neochordae under transesophageal echocardiographic 2D and 3D guidance...
October 7, 2016: Kardiologia Polska
https://www.readbyqxmd.com/read/27612951/patient-specific-cfd-simulation-of-intraventricular-haemodynamics-based-on-3d-ultrasound-imaging
#6
A M Bavo, A M Pouch, J Degroote, J Vierendeels, J H Gorman, R C Gorman, P Segers
BACKGROUND: The goal of this paper is to present a computational fluid dynamic (CFD) model with moving boundaries to study the intraventricular flows in a patient-specific framework. Starting from the segmentation of real-time transesophageal echocardiographic images, a CFD model including the complete left ventricle and the moving 3D mitral valve was realized. Their motion, known as a function of time from the segmented ultrasound images, was imposed as a boundary condition in an Arbitrary Lagrangian-Eulerian framework...
2016: Biomedical Engineering Online
https://www.readbyqxmd.com/read/27603720/computational-virtual-evaluation-of-the-effect-of-annuloplasty-ring-shape
#7
Ahnryul Choi, David D McPherson, Hyunggun Kim
Mitral regurgitation (MR) is a result of mitral valve (MV) pathology. Its etiology can be categorized as degenerative or functional MR. Ring annuloplasty aims to reconfigure a dilated mitral annulus to its normal size and shape. We investigated the effect of annuloplasty ring shape on MR outcome using our established 3-dimensional (3-D) echocardiography-based computational MV evaluation protocols. Virtual patient MV models were created from 3-D transesophageal echocardiographic data in patients with MR because of mitral annular dilation...
September 7, 2016: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/27537190/transcatheter-mitral-valve-implantation-30-day-outcome-of-first-in-man-experience-with-an-apically-tethered-device
#8
Cesare Quarto, Simon Davies, Alison Duncan, Alistair Lindsay, Georg Lutter, Lucian Lozonschi, Neil Moat
OBJECTIVE: A small number of transcatheter mitral valve implants (TMVIs) have been reported using devices designed to treat secondary mitral regurgitation (MR). However, MR has many etiologies, and patients have a broad spectrum of annular size, geometry, and lesions. There are a number of technical challenges for TMVI including left ventricular outflow tract obstruction and paravalvular MR. Thirty days' outcome of first-in-man implants with a novel TMVI device is reported. METHODS: The Tendyne TMVI system consists of a porcine pericardial valve in a tethered nitinol frame...
May 2016: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/27535338/novel-mechanistic-insights-into-atrial-functional-mitral-regurgitation%C3%A3-3-dimensional-echocardiographic-study
#9
Tomoko Machino-Ohtsuka, Yoshihiro Seo, Tomoko Ishizu, Kimi Sato, Akinori Sugano, Masayoshi Yamamoto, Yoshie Hamada-Harimura, Kazutaka Aonuma
BACKGROUND: Left atrial remodeling caused by persistent atrial fibrillation (AF) causes atrial functional mitral regurgitation (MR), even though left ventricular (LV) remodeling and organic changes of the mitral leaflets are lacking. The detailed mechanism of atrial functional MR has not been fully investigated. METHODS AND RESULTS: Of 1,167 patients with AF who underwent 3D transesophageal echocardiography, 75 patients were retrospectively selected who developed no, mild, or moderate-to-severe atrial functional MR (n=25 in each group) despite an LV ejection fraction ≥50% and LV volumes within the normal range...
September 23, 2016: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/27528216/three-dimensional-dynamic-morphology-of-the-mitral-valve-in-different-forms-of-mitral-valve-prolapse-potential-implications-for-annuloplasty-ring-selection
#10
Astrid Apor, Anikó Ilona Nagy, Attila Kovács, Aristomenis Manouras, Péter Andrássy, Béla Merkely
BACKGROUND: Real-time three-dimensional transesophageal echocardiography has increased our understanding of the distinct pathomechanisms underlying functional, ischaemic or degenerative mitral regurgitation. However, potential differences in dynamic morphology between the subtypes of degenerative mitral prolapse have scarcely been investigated. METHODS: In order to compare the dynamic behavior of the different phenotypes of degenerative mitral valve prolapse, real-time three-dimensional transesophageal echocardiography recordings of 77 subjects, 27 with Barlow disease (BD), 32 with Fibroelastic deficiency (FED) and 18 normal controls (NC) were analysed...
2016: Cardiovascular Ultrasound
https://www.readbyqxmd.com/read/27448551/mitral-valve-repair-using-a-semirigid-ring-patient-selection-and-early-outcomes
#11
Song Wan, Alex Pw Lee, Saina Attaran, Peter Sy Yu, Sylvia Sw Au, Micky Wt Kwok, Rainbow Wh Lau, Randolph Hl Wong, Innes Yp Wan, Siu-Keung Ng, Malcolm J Underwood
BACKGROUND: Commonly used complete mitral annuloplastic rings include saddle-shaped and semirigid rings, with no clear indication for either type. A semirigid ring may be preferred in patients whose native mitral saddle shape is well maintained. We present our experience of using semirigid rings for mitral valve repair. METHODS: We routinely measured the annular height-to-commissural width ratio by 3-dimensional transesophageal echocardiography prior to mitral repair...
September 2016: Asian Cardiovascular & Thoracic Annals
https://www.readbyqxmd.com/read/27324801/3d-printed-modeling-of-the-mitral-valve-for-catheter-based-structural-interventions
#12
Marija Vukicevic, Daniel S Puperi, K Jane Grande-Allen, Stephen H Little
As catheter-based structural heart interventions become increasingly complex, the ability to effectively model patient-specific valve geometry as well as the potential interaction of an implanted device within that geometry will become increasingly important. Our aim with this investigation was to combine the technologies of high-spatial resolution cardiac imaging, image processing software, and fused multi-material 3D printing, to demonstrate that patient-specific models of the mitral valve apparatus could be created to facilitate functional evaluation of novel trans-catheter mitral valve repair strategies...
June 20, 2016: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/27307549/three-dimensional-echocardiography-compared-with-computed-tomography-to-determine-mitral-annulus-size-before-transcatheter-mitral-valve-implantation
#13
George J Mak, Philipp Blanke, Kevin Ong, Christopher Naoum, Christopher R Thompson, John G Webb, Robert Moss, Robert Boone, Jian Ye, Anson Cheung, Brad Munt, Jonathon Leipsic, Jasmine Grewal
BACKGROUND: Previously, through the use of computed tomography (CT), it has been proposed that D-shaped versus saddle-shaped mitral annulus (MA) segmentation is more biomechanically appropriate to determine transcatheter mitral valve implantation size and eligibility. METHODS AND RESULTS: Forty-one patients with severe mitral regurgitation being considered for transcatheter mitral valve implantation who had undergone cardiac CT and 3-dimensional transesophageal echocardiography (3D-TEE) were retrospectively evaluated...
June 2016: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/27249815/anterior-mitral-valve-aneurysm-a-rare-sequelae-of-aortic-valve-endocarditis
#14
Rajesh Janardhanan, Muhammad Umar Kamal, Irbaz Bin Riaz, M Cristy Smith
UNLABELLED: SummaryIn intravenous drug abusers, infective endocarditis usually involves right-sided valves, with Staphylococcus aureus being the most common etiologic agent. We present a patient who is an intravenous drug abuser with left-sided (aortic valve) endocarditis caused by Enterococcus faecalis who subsequently developed an anterior mitral valve aneurysm, which is an exceedingly rare complication. A systematic literature search was conducted which identified only five reported cases in the literature of mitral valve aneurysmal rupture in the setting of E...
March 2016: Echo Research and Practice
https://www.readbyqxmd.com/read/27184953/reproducibility-of-a-novel-echocardiographic-3d-automated-software-for-the-assessment-of-mitral-valve-anatomy
#15
Iolanda Aquila, Ariana González, Covadonga Fernández-Golfín, Luis Miguel Rincón, Eduardo Casas, Ana García, Rocio Hinojar, José Julio Jiménez-Nacher, José Luis Zamorano
BACKGROUND: 3D transesophageal echocardiography (TEE) is superior to 2D TEE in quantitative anatomic evaluation of the mitral valve (MV) but it shows limitations regarding automatic quantification. Here, we tested the inter-/intra-observer reproducibility of a novel full-automated software in the evaluation of MV anatomy compared to manual 3D assessment. METHODS: Thirty-six out of 61 screened patients referred to our Cardiac Imaging Unit for TEE were retrospectively included...
2016: Cardiovascular Ultrasound
https://www.readbyqxmd.com/read/26823141/utility-of-real-time-3-dimensional-transesophageal-echocardiography-in-the-assessment-of-mitral-paravalvular-leak
#16
Antonio Arribas-Jimenez, Juan C Rama-Merchan, Manuel Barreiro-Pérez, Soraya Merchan-Gómez, Alberto Iscar-Galán, Ana Martín-García, Felix Nieto-Ballestero, Esther Sánchez-Corral, Javier Rodriguez-Collado, Ignacio Cruz-González, Pedro L Sanchez
BACKGROUND: Mitral paravalvular leak (PVL) is a potential complication of surgical valve replacement procedures. Real-time 3D transesophageal echocardiography (RT-3DTEE) has emerged as an efficient tool for providing essential information about the anatomy of mitral PVLs compared with 2DTEE findings. The purpose of this study was to evaluate the utility of RT-3DTEE in the assessment of mitral PVLs. METHODS AND RESULTS: The 3D characteristics of PVLs were recorded and compared with 2D findings...
2016: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/26712158/patient-specific-quantitation-of-mitral-valve-strain-by-computer-analysis-of-three-dimensional-echocardiography-a-pilot-study
#17
Sagit Ben Zekry, Jeff Freeman, Aarti Jajoo, Jiwen He, Stephen H Little, Gerald M Lawrie, Robert Azencott, William A Zoghbi
BACKGROUND: A paucity of data exists on mitral valve (MV) deformation during the cardiac cycle in man. Real-time 3-dimensional (3D) echocardiography now allows dynamic volumetric imaging of the MV, thus enabling computerized modeling of MV function directly in health and disease. METHODS AND RESULTS: MV imaging using 3D transesophageal echocardiography was performed in 10 normal subjects and 10 patients with moderate-to-severe or severe organic mitral regurgitation...
January 2016: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/26688087/preoperative-three-dimensional-valve-analysis-predicts-recurrent-ischemic-mitral-regurgitation-after-mitral-annuloplasty
#18
Wobbe Bouma, Eric K Lai, Melissa M Levack, Eric K Shang, Alison M Pouch, Thomas J Eperjesi, Theodore J Plappert, Paul A Yushkevich, Massimo A Mariani, Kamal R Khabbaz, Thomas G Gleason, Feroze Mahmood, Michael A Acker, Y Joseph Woo, Albert T Cheung, Benjamin M Jackson, Joseph H Gorman, Robert C Gorman
BACKGROUND: Valve repair for ischemic mitral regurgitation (IMR) with undersized annuloplasty rings is characterized by high IMR recurrence rates. Patient-specific preoperative imaging-based risk stratification for recurrent IMR would optimize results. We sought to determine if prerepair three-dimensional (3D) echocardiography combined with a novel valve-modeling algorithm would be predictive of IMR recurrence 6 months after repair. METHODS: Intraoperative transesophageal real-time 3D echocardiography was performed in 50 patients undergoing undersized ring annuloplasty for IMR and in 21 patients with normal mitral valves...
February 2016: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/26687280/annular-dynamics-after-mitral-valve-repair-with-different-prosthetic-rings-a-real-time-three-dimensional-transesophageal-echocardiography-study
#19
Hiroyuki Nishi, Koichi Toda, Shigeru Miyagawa, Yasushi Yoshikawa, Satsuki Fukushima, Masashi Kawamura, Daisuke Yoshioka, Tetsuya Saito, Takayoshi Ueno, Toru Kuratani, Yoshiki Sawa
PURPOSE: We assessed the effects of different types of prosthetic rings on mitral annular dynamics using real-time three-dimensional echocardiography (RT3DE). METHODS: RT3DE was performed in 44 patients, including patients undergoing mitral annuloplasty using the Cosgrove-Edwards flexible band (Group A, n = 10), the semi-rigid Sorin Memo 3D ring (Group B, n = 17), the semi-rigid Edwards Physio II ring (Group C, n = 7) and ten control subjects. Various annular diameters were measured throughout the cardiac cycle...
September 2016: Surgery Today
https://www.readbyqxmd.com/read/26574771/partial-detachment-of-mitral-valve-annuloplasty-ring-and-evaluation-with-real-time-3d-transesophageal-echocardiography
#20
Mehmet Bilge, Yakup Alsancak, Sina Ali, Ayşe Saatçi Yaşar
No abstract text is available yet for this article.
2015: Anatolian Journal of Cardiology
keyword
keyword
25966
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"