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https://www.readbyqxmd.com/read/30072206/acoustic-characterization-of-a-miniature-matrix-transducer-for-pediatric-3d-transesophageal-echocardiography
#1
Verya Daeichin, Deep Bera, Shreyas Raghunathan, Maysam Shabani Motlagh, Zhao Chen, Chao Chen, Emile Noothout, Hendrik J Vos, Michiel Pertijs, Johan G Bosch, Nico de Jong, Martin Verweij
This paper presents the design, fabrication and characterization of a miniature PZT-on-CMOS matrix transducer for real-time pediatric 3-dimensional (3D) transesophageal echocardiography (TEE). This 3D TEE probe consists of a 32 × 32 array of PZT elements integrated on top of an Application Specific Integrated Circuit (ASIC). We propose a partitioned transmit/receive array architecture wherein the 8 × 8 transmitter elements, located at the centre of the array, are directly wired out and the remaining receive elements are grouped into 96 sub-arrays of 3 × 3 elements...
July 30, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/30057361/mitraclip-implantation-under-sedation
#2
Inês Delgado, Ana Fonte Boa, Ana Filipa Carvalho, Bruno Melica, Pedro Braga, Vasco Gama Ribeiro
The percutaneous MitraClip system is a catheter-based device designed to perform edge-to-edge mitral valve (MV) leaflet repair at the site of regurgitation. MitraClip implantation is an alternative procedure in patients at high surgical risk with symptomatic severe mitral regurgitation (MR) who are not candidates for MV repair/replacement due to their degree of comorbidity and associated high mortality risk. The procedure is guided by 3-dimensional (3D) transesophageal echocardiography (TEE) and fluoroscopy...
July 26, 2018: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/29983494/asd-device-closure-in-pediatrics-3-dimensional-transthoracic-echocardiography-perspective
#3
Sonia A El-Saiedi, Hala M Agha, Mohamed F Shaltoot, Hayat H Nassar, Amal M El Sisi, Wael A Attia, Yasser M Sedky
Objective: Real-time three-dimensional echocardiography, using both reconstruction methods and RT3D, has been used as an extra helping tool in several forms of congenital heart diseases. Our aim was to understand the relation of the ASD device to all surrounding structures by 3-dimensional echocardiography (3D). Methods: This prospective study included 37 patients diagnosed as ASD secundum by transthoracic (TTE) and transesophageal echocardiography (TEE) referred for transcatheter closure from October 2013 to July 2016...
July 2018: Journal of the Saudi Heart Association
https://www.readbyqxmd.com/read/29981214/echocardiography-in-transcatheter-aortic-core-valve-implantation-part-2-transesophageal-echocardiography
#4
REVIEW
Tasneem Z Naqvi
Transesophageal echocardiography (TEE) plays a significant role during transcatheter aortic valve implantation (TAVR). 2DTEE allows assessment of anatomy of the aortic valve, aortic root, left ventricular (LV) outflow tract, severity of the aortic valve stenosis (AS), and the presence and severity of other valve stenosis and regurgitation. Left and right ventricular size and global function as well as cardiac hemodynamics pre and post TAVR and LV regional wall motion can be assessed. Three-dimensional (3D) imaging adds significantly via accurate measurement of aortic annulus that helps select the appropriate valve size...
July 2018: Echocardiography
https://www.readbyqxmd.com/read/29981197/three-dimensional-transesophageal-echocardiography-vs-cardiac-magnetic-resonance-in-the-assessment-of-planimetric-mitral-valve-area-in-rheumatic-mitral-stenosis
#5
Begum Uygur, Omer Celik, Fethi Emre Ustabasioglu, Okan Akinci, Mehmet Erturk
AIM: Rheumatic heart disease is a common cause of valvular disease, especially in developing countries. Echocardiography is the gold standard investigation modality for cardiac valves. In rheumatic mitral stenosis (MS), three-dimensional transesophageal echocardiography (3D TEE) provides better alignment of the image plane at the mitral tips and more accurate and reproducible planimetric measurement of mitral valve area (MVA). Cardiac magnetic resonance (CMR) is a new method that provides evaluation of cardiac anatomy and function noninvasively...
July 7, 2018: Echocardiography
https://www.readbyqxmd.com/read/29980790/loss-of-tuberous-sclerosis-complex-2-sensitizes-tumors-to-nelfinavir-bortezomib-therapy-to-intensify-endoplasmic-reticulum-stress-induced-cell-death
#6
Charlotte E Johnson, Elaine A Dunlop, Sara Seifan, Henry D McCann, Trevor Hay, Geraint J Parfitt, Ashley T Jones, Peter J Giles, Ming H Shen, Julian R Sampson, Rachel J Errington, D Mark Davies, Andrew R Tee
Cancer cells lose homeostatic flexibility because of mutations and dysregulated signaling pathways involved in maintaining homeostasis. Tuberous Sclerosis Complex 1 (TSC1) and TSC2 play a fundamental role in cell homeostasis, where signal transduction through TSC1/TSC2 is often compromised in cancer, leading to aberrant activation of mechanistic target of rapamycin complex 1 (mTORC1). mTORC1 hyperactivation increases the basal level of endoplasmic reticulum (ER) stress via an accumulation of unfolded protein, due to heightened de novo protein translation and repression of autophagy...
July 6, 2018: Oncogene
https://www.readbyqxmd.com/read/29958759/three-dimensional-echocardiographic-guidance-of-right-heart-catheterization-decreases-radiation-exposure-in-atrial-septal-defect-closures
#7
Pei-Ni Jone, Jenny E Zablah, Dale A Burkett, Michal Schäfer, Neil Wilson, Gareth J Morgan, Michael Ross
BACKGROUND: Radiation reduction is desirable in children undergoing cardiac catheterization. Three-dimensional (3D) transesophageal echocardiographic (3D TEE) imaging obviates the need for mental reconstruction of 3D structures from two-dimensional images. Three-dimensional TEE imaging is used in atrial septal defect (ASD) closures. Three-dimensional TEE guidance of right heart catheterization (RHC) without fluoroscopy for ASD closures has not been demonstrated. The aim of this study was to evaluate the feasibility of 3D TEE guidance of RHC in ASD closures and radiation reduction compared with historical control subjects...
June 26, 2018: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/29948082/3d-printed-heart-model-to-guide-laa-closure-useful-in-clinical-practice
#8
Anne-Lise Hachulla, Stéphane Noble, Gabriel Guglielmi, Daniel Agulleiro, Hajo Müller, Jean-Paul Vallée
OBJECTIVES: Correct device sizing for left atrial appendage (LAA) closure remains challenging due to complex LAA shapes. The aim of our study was to investigative the utility of personalized 3D-printed models (P3DPM) of the LAA to guide device size selection. METHODS: Fifteen patients (75.4 ±8.5years) scheduled for LAA closure using an Amulet device underwent cardiac computed tomography (CT). The LAA was segmented by semiautomatic algorithms using Vitrea® software...
June 14, 2018: European Radiology
https://www.readbyqxmd.com/read/29911010/three-dimensional-transesophageal-echocardiographic-diagnosis-of-catheter-endocarditis-hidden-in-intracaval-stent
#9
Rita Leonarda Musci, Cataldo Girasoli, Fabrizio Fumarola, Carlo D'Agostino, Paolo Colonna
In recent years, with an increasing number of central venous access procedures and cardiac implantable electronic device implantation, the incidence of infective endocarditis (IE) has become more prevalent. Two-dimensional transthoracic echocardiography (2D-TTE) and transesophageal echocardiography (TEE) are a key part of the evaluation of IE, but advances in three-dimensional echocardiography have enabled a better spatial resolution and visualization of cardiac structures, allowing the identification of any valvular vegetations, abscesses, or nodules...
April 2018: Journal of Cardiovascular Echography
https://www.readbyqxmd.com/read/29864199/diagnostic-significance-of-three-dimensional-echocardiography-in-asymptomatic-unicuspid-aortic-valve
#10
Zorica Mladenovic, Danijela Vranes, Slobodan Obradovic, Boris Dzudovic, Andjelka Angelkov Ristic, Nenad Ratkovic, Zoran Jovic, Marijan Spasic, Jelena Maric Kocijancic, Predrag Djruic
Unicuspid aortic valve (UAV) is a rare congenital anomaly of aorta associated with a faster progress of valvular dysfunction, aortic dilatation and with necessity for more frequent controls and precise evaluation Asymptomatic 35 year old man had abnormal systolic diastolic murmur on aortic valve during routine examination. Initial diagnostic with transthoracic echocardiography (TTE) supposed bicuspid aortic valve, while three-dimensional transesophageal echocardiography (3D TEE) and multidetector computed tomography defined unicuspid, unicomissural aortic valve with moderate aortic stenosis and regurgitation...
June 4, 2018: Echocardiography
https://www.readbyqxmd.com/read/29797230/geometry-of-the-left-ventricular-outflow-tract-assessed-by-3d-tee-in-patients-with-aortic-stenosis-impact-of-upper-septal-hypertrophy-on-measurements-of-doppler-derived-left-ventricular-stroke-volume
#11
Dan Koto, Masaki Izumo, Takafumi Machida, Kengo Suzuki, Kihei Yoneyama, Tomomi Suzuki, Ryo Kamijima, Yasuyuki Kobayashi, Tomoo Harada, Yoshihiro J Akashi
BACKGROUND: It is unclear how upper septal hypertrophy (USH) affects Doppler-derived left ventricular stroke volume (SV) in patients with AS. The aims of this study were to: (1) validate the accuracy of 3D transesophageal echocardiography (TEE) measurements of the left ventricular outflow tract (LVOT), (2) evaluate the differences in LVOT geometry between AS patients with and without USH, and (3) assess the impact of USH on measurement of SV. METHODS: In protocol 1, both 3D TEE and multi-detector computed tomography were performed in 20 patients with AS [aortic valve area (AVA) ≤ 1...
May 24, 2018: Journal of Echocardiography
https://www.readbyqxmd.com/read/29762923/intraoperative-transesophageal-echocardiography-for-surgical-repair-of-degenerative-mitral-regurgitation
#12
Calogera Pisano, Claudia Calia, Alessandro Ricasoli, Oreste Fabio Triolo, Vincenzo Argano
BACKGROUND: Segmental analysis of diseased mitral valves is important to predict a successful surgical valve repair. An assessment was made of the comparative accuracy of intraoperative three-dimensional (3D) and two-dimensional (2D) transesophageal echocardiography (TEE) in the evaluation of mitral valve lesions when compared with intraoperative surgical segmental analysis. METHODS: A total of 42 consecutive patients (12 females, 30 males; mean age 70.5 ± 14 years) with severe mitral valve regurgitation due to degenerative disease and who underwent mitral valve repair was enrolled in the study...
September 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/29747569/systolic-characteristics-and-dynamic-changes-of-the-mitral-valve-in-different-grades-of-ischemic-mitral-regurgitation-insights-from-3d-transesophageal-echocardiography
#13
Caroline Morbach, Diego Bellavia, Stefan Störk, Lissa Sugeng
BACKGROUND: Mitral regurgitation in ischemic heart disease (IMR) is a strong predictor of outcome but until now, pathophysiology is not sufficiently understood and treatment is not satisfying. We aimed to systematically evaluate structural and functional mitral valve leaflet and annular characteristics in patients with IMR to determine the differences in geometric and dynamic changes of the MV between significant and mild IMR. METHODS: Thirty-seven patients with IMR (18 mild (m)MR, 19 significant (moderate+severe) (s)MR) and 33 controls underwent TEE...
May 10, 2018: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29687797/impact-of-substrate-stiffness-on-dermal-papilla-aggregates-in-microgels
#14
Justin J Y Tan, Jie Kai Tee, Keat Onn Chou, Shi Ya Au Yong, Jing Pan, Han Kiat Ho, Paul C L Ho, Lifeng Kang
Interaction between cells and the extracellular environment plays a vital role in cellular development. The mechanical property of a 3-dimensional (3D) culture can be modified to mimic in vivo conditions. Dermal papilla (DP) cells are shown to gradually lose their inductivity in hair cycle development in a 2-dimensional culture. They are shown to partially restore their inductivity when transferred into a 3D microenvironment. In this study, a microarray fabricated from three different concentrations of poly-ethylene-glycol-diacrylate 3500, namely 5%, 10% and 15% w/v, yielded increasing substrate stiffness...
May 29, 2018: Biomaterials Science
https://www.readbyqxmd.com/read/29650399/superiority-of-novel-automated-assessment-of-aortic-annulus-by-intraoperative-three-dimensional-transesophageal-echocardiography-in-patients-with-severe-aortic-stenosis-comparison-with-conventional-cross-sectional-assessment
#15
Nahoko Kato, Kentaro Shibayama, Masahiko Noguchi, Yu Makihara, Hiroshi Okumura, Kotaro Obunai, Mitsuaki Isobe, Kenzo Hirao, Hiroyuki Watanabe
BACKGROUND: Previous studies have demonstrated that three-dimensional (3D) transesophageal echocardiography (TEE) is an alternative to multi-detector computed tomography (MDCT) for aortic valve sizing in transcatheter aortic valve replacement (TAVR). However, conventional cross-sectional analysis of aortic annulus by 3D TEE has some limitations such as lengthy analytical time. A novel software for automated valve measurement has been developed for 3D TEE. We evaluated the accuracy and analytical time of aortic annular measurements using this novel automated software in the clinical setting...
April 9, 2018: Journal of Cardiology
https://www.readbyqxmd.com/read/29625649/validation-of-a-novel-software-tool-for-automatic-aortic-annular-sizing-in-three-dimensional-transesophageal-echocardiographic-images
#16
Sandro Queirós, Pedro Morais, Christophe Dubois, Jens-Uwe Voigt, Wolfgang Fehske, Andreas Kuhn, Tobias Achenbach, Jaime C Fonseca, João L Vilaça, Jan D'hooge
BACKGROUND: Accurate aortic annulus (AoA) sizing is crucial for transcatheter aortic valve implantation planning. Three-dimensional (3D) transesophageal echocardiography (TEE) is a viable alternative to the standard multidetector row computed tomography (MDCT) for such assessment, with few automatic software solutions available. The aim of this study was to present and evaluate a novel software tool for automatic AoA sizing by 3D TEE. METHODS: One hundred one patients who underwent both preoperative MDCT and 3D TEE were retrospectively analyzed using the software...
April 2018: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/29622985/the-value-of-three-dimensional-color-doppler-trans-esophageal-echocardiography-in-predicting-the-number-of-mitraclip-devices-needed-during-the-procedure
#17
Hani M Mahmoud, Ali M Al-Ameen, Mohamed H Hassan, Tarek Badr, Hesham Nieem, Ahmed A Shaheen, Abdullah E Ghabashi
Purpose: During MitraClip procedure, one or more clips might be needed to effectively reduce the mitral regurgitation (MR). Three-dimensional vena-contracta (3D-VC) assessed by color Doppler three-dimensional trans-esophageal echocardiography (3D-TEE) was proven to be well correlated with MR severity. However, its role in predicting the number of MitraClip devices needed during the procedure was not fully determined. Aim of this study is to assess the predictive value of 3D-VC area & length in determining the number of clips needed during the procedure...
December 2017: The Egyptian heart journal: (EHJ): official bulletin of the Egyptian Society of Cardiology
https://www.readbyqxmd.com/read/29600058/assessment-of-the-mitral-valve-coaptation-zone-with-2d-and-3d-transesophageal-echocardiography-before-and-after-mitral-valve-repair
#18
Yong Guo, Yihua He, Ye Zhang, Shuping Ge, Lin Sun, Wenxu Liu, Jiancheng Han, Xiaoyan Gu
Background: Mitral valve (MV) coaptation is very important in MV repair patients. But accurate quantitation of the degree of MV coaptation remains challenging. This study aimed to evaluate the utility of two-dimensional (2D) and three-dimensional (3D) transesophageal echocardiography (TEE) to assess MV coaptation before and after MV repair. Methods: Forty-eight patients [(age: 52.23±13.31 years; 26 men (54.17%)] undergoing MV repair for mitral regurgitation (MR) were studied...
January 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29526888/congenital-absence-of-left-atrial-appendage-diagnosed-by-multimodality-imaging
#19
Yoshinari Enomoto, Go Hashimoto, Naohiko Sahara, Hikari Hashimoto, Hiroki Niikura, Keijiro Nakamura, Raisuke Iijima, Hidehiko Hara, Makoto Suzuki, Mahito Noro, Masao Moroi, Kaoru Sugi, Masato Nakamura
A 70-years-old male with a history of hypertension and drug resistant paroxysmal atrial fibrillation (AF) presented to our hospital for catheter ablation to his symptomatic AF. He had no prior surgical or percutaneous procedure to close or exclude the left atrial appendage (LAA). A transesophageal echocardiography (TEE) was performed to rule out intra-cardiac thrombus prior to the ablation procedure. Although the TEE imaging at multiple acquisition angles was obtained, the LAA could not be visualized and an absence of the LAA was suspected...
March 30, 2018: International Heart Journal
https://www.readbyqxmd.com/read/29523465/low-rates-of-major-complications-for-radiofrequency-ablation-of-atrial-fibrillation-maintained-over-14-years-a-single-centre-experience-of-2750-consecutive-cases
#20
Aleksandr Voskoboinik, Paul B Sparks, Joseph B Morton, Geoffrey Lee, Stephen A Joseph, Joshua J Hawson, Peter M Kistler, Jonathan M Kalman
BACKGROUND: Despite technological advances, studies continue to report high complication rates for atrial fibrillation (AF) ablation. We sought to review complication rates for AF ablation at a high-volume centre over a 14-year period and identify predictors of complications. METHODS: We reviewed prospectively collected data from 2750 consecutive AF ablation procedures at our institution using radiofrequency energy (RF) between January 2004 and May 2017. All cases were performed under general anaesthetic with transoesophageal echocardiography (TEE), 3D-mapping and an irrigated ablation catheter...
February 3, 2018: Heart, Lung & Circulation
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