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https://www.readbyqxmd.com/read/27911025/effect-of-balloon-expandable-transcatheter-aortic-valve-replacement-positioning-a-patient-specific-numerical-model
#1
Matteo Bianchi, Gil Marom, Ram P Ghosh, Harold A Fernandez, James R Taylor, Marvin J Slepian, Danny Bluestein
Transcatheter aortic valve replacement (TAVR) has emerged as a life-saving and effective alternative to surgical valve replacement in high-risk, elderly patients with severe calcific aortic stenosis. Despite its early promise, certain limitations and adverse events, such as suboptimal placement and valve migration, have been reported. In the present study, it was aimed to evaluate the effect of various TAVR deployment locations on the procedural outcome by assessing the risk for valve migration. The deployment of a balloon-expandable Edwards SAPIEN valve was simulated via finite element analysis in a patient-specific calcified aortic root, which was reconstructed from CT scans of a retrospective case of valve migration...
December 2016: Artificial Organs
https://www.readbyqxmd.com/read/27904162/impact-of-catheterization-lab-computer-software-settings-on-hemodynamic-assessment-of-aortic-stenosis
#2
Zaher Fanari, Anitha Rajamanickam, Mathew Grove, Sumaya Hammami, Cassie Walls, Paul Kolm, William Weintraub, Andrew J Doorey
BACKGROUND: Accurate assessment of Cardiac Output (CO) is a critical measurement in the calculation of aortic valve area (AVA). Due to the known inaccuracy of estimated Fick calculations, many measure thermodilution (TD) CO as well due to previous studies showing better correlation with the gold standard direct CO. Previous studies showed suboptimal correlation between both methods. Most physicians assume that the TD CO is chosen by catheterization laboratory software for AVA evaluation...
July 2016: Delaware Medical Journal
https://www.readbyqxmd.com/read/27903575/early-severe-coronary-artery-disease-and-aortic-coarctation-in-a-child-with-familial-hypercholesterolaemia
#3
Dina Labib, Haytham Soliman, Kareem Said, Khaled Sorour
An 11-year-old boy presented with easy fatigability, multiple xanthomas, and absent pedal pulsations. Laboratory workup showed severe hypercholesterolaemia and non-invasive imaging revealed 'normally functioning' bicuspid aortic valve and tight aortic coarctation. Coronary angiography showed severe right coronary artery (RCA) stenosis. Medical treatment resulted in significant improvement of dyslipidaemia. We successfully performed balloon dilation and stenting of his coarctation, as well as percutaneous coronary intervention for RCA lesion...
November 30, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27903539/outcome-implication-of-aortic-valve-area-normalized-to-body-size-in-asymptomatic-aortic-stenosis
#4
Christophe Tribouilloy, Yohann Bohbot, Sylvestre Maréchaux, Nicolas Debry, Quentin Delpierre, Marcel Peltier, Momar Diouf, Michel Slama, David Messika-Zeitoun, Dan Rusinaru
BACKGROUND: Current guidelines define severe aortic stenosis in patients with aortic valve area normalized to body surface area (AVA/BSA) <0.6 cm(2)/m(2); yet, this cutoff has never been validated. Moreover, it is not known whether AVA normalization to other body size indexes allows improved outcome prediction. We aim to test the value of AVA normalized to body size for outcome prediction in asymptomatic aortic stenosis. METHODS AND RESULTS: We included 289 patients with asymptomatic aortic stenosis, preserved ejection fraction, and AVA<1...
November 2016: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/27903371/-impact-of-reduced-left-ventricular-ejection-fraction-on-all-cause-mortality-of-75-years-old-and-over-patients-with-moderate-to-severe-aortic-stenosis
#5
Z Li, Y Q Ye, M Y Wang, H Y Xu, S Y Teng, J Qian, W Wang, X Wang, Y J Wu
Objective: To evaluate the impact of left ventricular systolic dysfunction on all-cause mortality of 75 years old and over patients with moderate to severe aortic stenosis. Methods: Clinical data of 301 consecutive aged (≥75 years old) patients with a diagnosis of non-rheumatic moderate to severe aortic stenosis by echocardiography between January 1, 2008 and January 1, 2015 in our hospital were retrospectively analyzed. According to the LVEF, patients were divided into normal LVEF subjects and low LVEF subjects, and the low LVEF level was set at below 60%(≤60%(n=171)vs...
October 24, 2016: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/27900928/-is-transcatheter-aortic-valve-implantation-superior-to-surgical-valve-replacement
#6
Y Schoon
Severe aortic valve stenosis is treated traditionally with surgical valve replacement. Transcatheter aortic valve implantation (TAVI) has experienced a rapid development in the last decade. Indications for TAVI have been broadened from inoperable and high surgical risk patients to intermediate-risk patients. Mortality rates are identical after TAVI compared with surgical valve replacement in intermediate-risk patients. However, mortality is not an appropriate outcome measure for a frail older person. Quality of life, autonomy and functioning independently are probably more suitable outcomes in this frail older population...
2016: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/27899140/transapical-transcatheter-aortic-valve-replacement-in-patients-with-or-without-prior-coronary-artery-bypass-graft-operation
#7
Konstantinos V Voudris, S Chiu Wong, Ryan Kaple, Polydoros N Kampaktsis, Andreas R de Biasi, Jonathan S Weiss, Richard Devereux, Karl Krieger, Luke Kim, Rajesh V Swaminathan, Dmitriy N Feldman, Harsimran Singh, Nikolaos J Skubas, Robert M Minutello, Geoffrey Bergman, Arash Salemi
BACKGROUND: Transapical approach (TA) is an established access alternative to the transfemoral technique in patients undergoing transcatheter aortic valve replacement (TAVR) for treatment of symptomatic aortic valve stenosis. The impact of prior coronary artery bypass grafting (CABG) on clinical outcomes in patients undergoing TA-TAVR is not well defined. METHODS: A single center retrospective cohort analysis of 126 patients (male 41%, mean age 85.8 ± 6.1 years) who underwent TA balloon expandable TAVR (Edwards SAPIEN, SAPIEN XT or SAPIEN 3) was performed...
November 29, 2016: Journal of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/27898500/patterns-and-trends-of-transcatheter-aortic-valve-implantation-in-italy-insights-from-rispeva
#8
Arturo Giordano, Nicola Corcione, Giuseppe Biondi-Zoccai, Sergio Berti, Anna Sonia Petronio, Carlo Pierli, Patrizia Presbitero, Pietro Giudice, Gennaro Sardella, Antonio L Bartorelli, Roberto Bonmassari, Ciro Indolfi, Alfredo Marchese, Elvis Brscic, Alberto Cremonesi, Luca Testa, Nedy Brambilla, Francesco Bedogni
AIMS: Clinical trials have shown that transcatheter aortic valve implantation for aortic stenosis compares favorably to surgical replacement in high-risk patients and is superior to medical therapy in those at prohibitive risk. There is uncertainty however on patterns and trends in transcatheter aortic valve implantation, especially focusing on Italy. METHODS: The RISPEVA study is a prospective Italian registry including 21 institutions. Patients have been enrolled since late 2012, and data collection includes several baseline, procedural, in-hospital, and follow-up details...
November 24, 2016: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/27895025/medical-treatment-of-aortic-stenosis
#9
Guillaume Marquis-Gravel, Björn Redfors, Martin B Leon, Philippe Généreux
Untreated, severe, symptomatic aortic stenosis is associated with a dismal prognosis. The only treatment shown to improve survival is aortic valve replacement; however, before symptoms occur, aortic stenosis is preceded by a silent, latent phase characterized by a slow progression at the molecular, cellular, and tissue levels. In theory, specific medical therapy should halt aortic stenosis progression, reduce its hemodynamic repercussions on left ventricular function and remodeling, and improve clinical outcomes...
November 29, 2016: Circulation
https://www.readbyqxmd.com/read/27894069/association-between-left-atrial-dilatation-and-invasive-hemodynamics-at-rest-and-during-exercise-in-asymptomatic-aortic-stenosis
#10
Nicolaj Lyhne Christensen, Jordi Sanchez Dahl, Rasmus Carter-Storch, Rine Bakkestrøm, Kurt Jensen, Flemming Hald Steffensen, Eva Vad Søndergaard, Lars Videbæk, Jacob Eifer Møller
BACKGROUND: Transition from an asymptomatic to symptomatic state in severe aortic stenosis is often difficult to assess. Identification of a morphological sign of increased hemodynamic load may be important in asymptomatic aortic stenosis to identify patients at risk. METHODS AND RESULTS: Thirty-nine patients with asymptomatic severe aortic stenosis (aortic valve area <1 cm(2), peak jet velocity >3.5 m/s) underwent exercise testing with simultaneous invasive hemodynamic monitoring and Doppler echocardiography...
October 2016: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/27894060/combined-use-of-tissue-doppler-imaging-and-natriuretic-peptides-as-prognostic-marker-in-asymptomatic-aortic-stenosis
#11
Miquel Gomez Perez, Mireia Ble, Mercedes Cladellas, Lluis Molina, Joan Vila, Alexandra Mas-Stachurska, Laura Higueras-Ortega, Julio Marti-Almor
INTRODUCTION: Tissue Doppler imaging (TDI) and N-terminal-pro-Brain Natriuretic Peptide (NT-proBNP) provides useful non-invasive information about left ventricle filling pressures and both have demonstrated to be a prognostic marker in some valve disease as aortic stenosis (AS). OBJECTIVES: To assess the clinical value of combined TDI and NT-proBNP information in asymptomatic AS patients. MATERIAL AND METHODS: Prospective study of 350 initially asymptomatic moderate to severe AS patients with: Mean aortic valve area 0...
November 10, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27893194/incidence-morphology-and-progression-of-bicuspid-aortic-valve-in-pediatric-and-young-adult-subjects-with-coexisting-congenital-heart-defects
#12
Talha Niaz, Joseph T Poterucha, Jonathan N Johnson, Cecilia Craviari, Thomas Nienaber, Jared Palfreeman, Frank Cetta, Donald J Hagler
BACKGROUND: Bicuspid aortic valve (BAV) occurs both as an isolated cardiac lesion and in association with congenital heart defects (CHD). Their aim was to identify the incidence and morphology of BAV in patients with coexisting CHD and compare their disease progression to patients with isolated BAV. METHODS: The Mayo Clinic echocardiography database was retrospectively analyzed to identify pediatric and young adult patients (≤22 years) who were diagnosed with BAV from 1990 to 2015...
November 28, 2016: Congenital Heart Disease
https://www.readbyqxmd.com/read/27892889/the-impact-of-functional-vs-degenerative-mitral-regurgitation-on-clinical-outcomes-among-patients-undergoing-transcatheter-aortic-valve-implantation
#13
René Vollenbroich, Stefan Stortecky, Fabien Praz, Jonas Lanz, Anna Franzone, Katarzyna Zuk, Dik Heg, Marco Valgimigli, Crochan John O'Sullivan, Corinna Heinisch, Eva Roost, Peter Wenaweser, Stephan Windecker, Thomas Pilgrim
BACKGROUND: Among patients undergoing transcatheter aortic valve implantation (TAVI), concomitant mitral regurgitation (MR) has been associated with adverse prognosis. We aimed to assess long-term clinical outcomes according to MR etiology. METHODS: In a single-center registry of consecutive patients undergoing TAVI, we investigated the impact of functional (FMR) vs degenerative (DMR) MR on cardiovascular (CV) mortality throughout 2years of follow-up. RESULTS: Among 603 patients (mean age 82...
October 28, 2016: American Heart Journal
https://www.readbyqxmd.com/read/27890512/safety-and-efficacy-of-valve-repositioning-during-transcatheter-aortic-valve-replacement-with-the-lotus-valve-system
#14
Hashrul N Z Rashid, Robert Gooley, Liam McCormick, Sarah Zaman, Satish Ramkumar, Damon Jackson, Ameera Amiruddin, Arthur Nasis, James Cameron, Ian T Meredith
OBJECTIVE: To determine the safety and efficacy of valve repositioning following transcatheter aortic valve replacement (TAVR) with the Lotus Valve System (Boston Scientific, Marlborough, MA, USA). INTRODUCTION: TAVR is a well-established treatment for severe aortic stenosis. The Lotus Valve System is fully repositionable and retrievable. Valve repositioning has the potential to minimize TAVR-related complications caused by valve malposition; however, the effect on adverse event rates such as stroke is unknown...
November 24, 2016: Journal of Cardiology
https://www.readbyqxmd.com/read/27888571/melody-valve-implantation-within-freestyle-stentless-porcine-aortic-heterograft
#15
James A Kuo, Ashlea A Feezel, Traci N Putnam, Deborah A Schutte
BACKGROUND: The Melody transcatheter pulmonary valve has been implanted successfully worldwide since its first implant in 2000. The vast majority of these valves have been implanted in pulmonary homografts. In our institution, the most common valve used for pulmonary valve replacement is the Medtronic Freestyle stentless porcine aortic heterograft. OBJECTIVE: We describe our experience implanting the Melody valve within the Freestyle heterograft. METHODS: Retrospective chart review was performed...
November 26, 2016: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/27888494/patient-specific-computer-modelling-its-role-in-the-planning-of-transcatheter-aortic-valve-implantation
#16
REVIEW
N El Faquir, B Ren, N M Van Mieghem, J Bosmans, P P de Jaegere
Transcatheter aortic valve implantation is increasingly used to treat patients with severe aortic stenosis who are at increased risk for surgical aortic valve replacement and is projected to be the preferred treatment modality. As patient selection and operator experience have improved, it is hypothesised that device-host interactions will play a more dominant role in outcome. This, in combination with the increasing number of valve types and sizes, confronts the physician with the dilemma to choose the valve that best fits the individual patient...
November 25, 2016: Netherlands Heart Journal
https://www.readbyqxmd.com/read/27887818/three-dimensional-morphology-of-the-left-ventricular-outflow-tract-impact-on-grading-aortic-stenosis-severity
#17
Luis Caballero, Daniel Saura, María José Oliva-Sandoval, Josefa González-Carrillo, María Dolores Espinosa, Miguel García-Navarro, Mariano Valdés, Patrizio Lancellotti, Gonzalo de la Morena
BACKGROUND: Left ventricular outflow tract (LVOT) measurement is a critical step in the quantification of aortic valve area. The assumption of a circular morphology of the LVOT may induce some errors. The aim of this study was to assess the three-dimensional (3D) morphology of the LVOT and its impact on grading aortic stenosis severity. METHODS: Fifty-eight patients with aortic stenosis were studied retrospectively. LVOT dimensions were measured using 3D transesophageal echocardiography at three levels: at the hinge points (HP) of the aortic valve and at 4 and 8 mm proximal to the annular plane...
November 22, 2016: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/27887725/a-calcified-polymeric-valve-for-valve-in-valve-applications
#18
Ahmad Falahatpisheh, Daisuke Morisawa, Taraz T Toosky, Arash Kheradvar
The prevalence of aortic valve stenosis (AS) is increasing in the aging society. More recently, novel treatments and devices for AS, especially transcatheter aortic valve replacement (TAVR) have significantly changed the therapeutic approach to this disease. Research and development related to TAVR require testing these devices in the calcified heart valves that closely mimic a native calcific valve. However, no animal model of AS has yet been available. Alternatively, animals with normal aortic valve that are currently used for TAVR experiments do not closely replicate the aortic valve pathology required for proper testing of these devices...
November 16, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/27886617/transcatheter-versus-surgical-aortic-valve-replacement-in-low-to-intermediate-risk-patients-a-meta-analysis-of-randomized-and-observational-studies
#19
Yijiang Zhou, Yanwei Wang, Yutao Wu, Jianhua Zhu
BACKGROUND: Transcatheter aortic valve replacement (TAVR) has become the treatment of choice for patients with aortic stenosis and the preferred alternative for high surgical risk patients. However, TAVR's suitability for patients at low to intermediate risk still remains controversial. METHODS: PubMed, MEDLINE and Clinical trials were systematically searched for randomized control trials and observational cohort studies which reported the clinical outcomes of TAVR versus surgical aortic valve replacement (SAVR) in patients at low to intermediate surgical risk...
November 12, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27886611/inter-and-intraobserver-consistency-in-lv-myocardial-strain-measurement-using-a-novel-multi-layer-technique-in-patients-with-severe-aortic-stenosis-and-preserved-lv-ejection-fraction
#20
Koya Ozawa, Nobusada Funabashi, Tomoko Kamata, Yoshio Kobayashi
BACKGROUND: A new transthoracic echocardiography (TTE) technique allows multi-layer measurement of left ventricular (LV), endocardial, epicardial, and whole layer myocardial strain. We evaluated interobserver and intraobserver TTE reproducibility for 2D LV global longitudinal (GLS) and circumferential strain (GCS) estimates using data from severe aortic stenosis (AS) subjects with preserved LV ejection fraction (EF). METHODS: Twenty severe AS subjects (11 male; mean age, 75±7years; LV EF >50%) underwent TTE (Vivid E9, GE Healthcare)...
November 9, 2016: International Journal of Cardiology
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