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mechanical aortic valve

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https://www.readbyqxmd.com/read/28432156/epidemiology-of-valvular-heart-disease-in-a-swedish-nationwide-hospital-based-register-study
#1
Pontus Andell, Xinjun Li, Andreas Martinsson, Charlotte Andersson, Martin Stagmo, Bengt Zöller, Kristina Sundquist, J Gustav Smith
OBJECTIVE: Transitions in the spectrum of valvular heart diseases (VHDs) in developed countries over the 20th century have been reported from clinical case series, but large, contemporary population-based studies are lacking. METHODS: We used nationwide registers to identify all patients with a first diagnosis of VHD at Swedish hospitals between 2003 and 2010. Age-stratified and sex-stratified incidence of each VHD and adjusted comorbidity profiles were assessed...
April 21, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28432006/stepwise-use-of-circulatory-support-devices-in-a-patient-refractory-to-cardiopulmonary-resuscitation
#2
Marco Spartera, Richard J Jabbour, Mauro Chiarito, Michele De Bonis, Federico Pappalardo
This case describes the management of a patient admitted to an emergency department with general malaise, who deteriorated into cardiac arrest and refractory to advanced life support measures. After extracorporeal cardiopulmonary resuscitation (eCPR) with veno-arterial extracorporeal membrane oxygenation in association with an Impella 2.5 device, the patient underwent cardiac surgery (tissue aortic valve replacement, coronary artery bypass grafting and implantation of short-term paracorporeal left ventricular assist device)...
April 8, 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/28427320/the-role-of-inelastic-deformations-in-the-mechanical-response-of-endovascular-shape-memory-alloy-devices
#3
Lorenza Petrini, Alessandro Bertini, Francesca Berti, Giancarlo Pennati, Francesco Migliavacca
Nickel-titanium alloys are commonly adopted for producing cardiovascular minimally invasive devices such as self-expandable stents, aortic valves and stent-grafts. These devices are subjected to cyclic loads (due to blood pulsatility, leg or heart movements), that can induce fatigue fracture, and may also be subjected to very large deformations (due to crimping procedure, a tortuous physiological path or overloads), that can induce material yield. Recently, the authors developed a new constitutive model that considers inelastic strains due to not-completed reverse phase transformation (not all the stress-induced martensite turns back to austenite) or/and plasticity and their accumulation during cyclic loads...
May 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28425027/10-year-results-of-on-x-bileaflet-mechanical-heart-valve-in-the-aortic-position-low-target-inr-regimen-in-japanese
#4
Hideki Teshima, Masahiko Ikebuchi, Yosuke Miyamoto, Ryuta Tai, Toshikazu Sano, Yusuke Kinugasa, Hiroyuki Irie
OBJECTIVES: This study was designed to establish clinical outcomes after aortic valve replacement (AVR) with On-X bileaflet mechanical heart valve. METHODS: Between 2006 and 2014, AVR was performed to 686 patients. Of them, 78 patients using On-X valve were enrolled. The mean age was 65 ± 11 years (ranged 33-85); 65% were men; and 81% were in sinus rhythm preoperatively. Calcific or degenerative tricuspid aortic valve was present in 73%. Concomitant procedures included coronary artery bypass grafting (22%), Bentall (8%), mitral valve procedure (3%) and other (9%)...
April 19, 2017: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28415104/p697new-indices-for-a-best-quantification-of-left-ventricular-function-in-heart-valve-diseases
#5
A Hubert, E Galli, G Bouzille, E Samset, E Donal
Aims. The Assessment of left ventricular (LV) function remains a clinical challenge especially in patients with preserved LV ejection fraction (EF) and valvular heart diseases (VHD). Mechanical dispersion is supposed to be a strong predictor of events and, to be related to the extent of fibrosis. Regional cardiac work is a new validated and very promising approach to quantify LV-function. We investigated the differences in mechanical dispersions and global LV work (totW) and wasted work fraction (WWF) in normal subjects and in patients with severe primary mitral regurgitation (MR) and severe aortic stenosis (AS)...
December 1, 2016: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28413185/comparison-of-the-long-term-outcomes-of-mechanical-and-bioprosthetic-aortic-valves%C3%A3-a-propensity-score-analysis
#6
Kenji Minakata, Shiro Tanaka, Nobushige Tamura, Shigeki Yanagi, Yohei Ohkawa, Shuichi Okonogi, Tatsuo Kaneko, Akihiko Usui, Tomonobu Abe, Mitsuomi Shimamoto, Yoshiharu Takahara, Kazuo Yamanaka, Hitoshi Yaku, Ryuzo Sakata
BACKGROUND: The aim of this study was to assess the long-term outcomes of aortic valve replacement (AVR) with either mechanical or bioprosthetic valves according to age at operation.Methods and Results:A total of 1,002 patients (527 mechanical valves and 475 bioprosthetic valves) undergoing first-time AVR were categorized according to age at operation: group Y, age <60 years; group M, age 60-69 years; and group O, age ≥70 years). Outcomes were compared on propensity score analysis (adjusted for 28 variables)...
April 12, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28410571/pre-and-post-surgical-evaluation-of-the-inflammatory-response-in-patients-with-aortic-stenosis-treated-with-different-types-of-prosthesis
#7
Maria Elena Soto, Jose Luis Salas, Jesus Vargas-Barron, Ricardo Marquez, Alejandra Rodriguez-Hernandez, Rafael Bojalil-Parra, Israel Pérez-Torres, Veronica Guarner-Lans
BACKGROUND: The inflammatory process in aortic valvular stenosis persists after surgery to replace the valve in almost half of the patients. No association has been found to its persistence. The main objective of this study was to evaluate the inflammatory response in patients with aortic stenosis through the determination of several biomarkers in plasma measured before and after the valvular replacement and to seek an association with the type of prosthesis used. METHODS: This is an observational study with a follow up of 6 months in subjects with severe aortic stenosis...
April 14, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28407120/biological-versus-mechanical-bentall-procedure-for-aortic-root-replacement-a-propensity-score-analysis-of-a-consecutive-series-of-1112-patients%C3%A2
#8
Antonio Pantaleo, Giacomo Murana, Luca Di Marco, Giuliano Jafrancesco, Giuseppe Barberio, Paolo Berretta, Alessandro Leone, Roberto Di Bartolomeo, Davide Pacini
OBJECTIVES: In this study, a propensity-matching analysis was used to compare biological versus mechanical composite valve graft implantation for early mortality and morbidities and for late complications including the need for aortic reintervention. METHODS: Between 1978 and 2011, 1112 consecutive patients underwent a complete aortic root replacement using either a biological Bentall (BB, n  = 356) or a mechanical Bentall (MB, n  = 756) valve conduit. Preoperative data were stratified according to the type of valve graft, and treatment bias was addressed by propensity score analysis...
April 11, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28400190/early-and-mid-term-outcome-of-the-st-jude-medical-regent-19-mm-aortic-valve-mechanical-prosthesis-functional-and-haemodynamic-evaluation
#9
Edvin Prifti, Massimo Bonacchi, Giovanni Minardi, Klodian Krakulli, Arben Baboci, Giampiero Esposito, Aurel Demiraj, Merita Zeka, Edlira Rruci
BACKGROUND AND OBJECTIVES: The aim of the present study is to report the early and mid-term clinical and haemodynamic results of the St Jude Medical Regent 19-mm aortic mechanical prothesis (SJMR-19). MATERIALS AND METHODS: Between January 2002 and January 2012, 265 patients with aortic valve disease underwent AVR (Aortic Valve Replacement) with a SJMR-19 (St Jude Medical Regent Nr.19). There were 51 males. Mean age was 67.5±12.72years and mean body surface area (BSA) was 1...
March 28, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28396860/aortic-valve-replacement-for-moderate-aortic-stenosis-with-severe-calcification-and-left-ventricualr-dysfunction-a-case-report-and-review-of-the-literature
#10
Nikhil Narang, Roberto M Lang, Vladimir M Liarski, Valluvan Jeevanandam, Marion A Hofmann Bowman
A 55-year-old man with a history of erosive, seropositive rheumatoid arthritis (RA), and interstitial lung disease presented with shortness of breath. Echocardiography showed new-onset severe left ventricular (LV) dysfunction with an ejection fraction (EF) of 15% and moderately increased mean aortic valve gradient of 20 mmHg in a trileaflet aortic valve with severe sclero-calcific degeneration. Coronary angiography revealed no significant obstructive coronary disease. Invasive hemodynamic studies and dobutamine stress echocardiography were consistent with moderate aortic stenosis...
2017: Frontiers in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28394022/limited-versus-full-sternotomy-for-aortic-valve-replacement
#11
REVIEW
Bilal H Kirmani, Sion G Jones, S C Malaisrie, Darryl A Chung, Richard Jnn Williams
BACKGROUND: Aortic valve disease is a common condition that is easily treatable with cardiac surgery. This is conventionally performed by opening the sternum longitudinally down the centre ("median sternotomy") and replacing the valve under cardiopulmonary bypass. Median sternotomy is generally well tolerated, but as less invasive options have become available, the efficacy of limited incisions has been called into question. In particular, the effects of reducing the visibility and surgical access has raised safety concerns with regards to the placement of cannulae, venting of the heart, epicardial wire placement, and de-airing of the heart at the end of the procedure...
April 10, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28385406/clinical-bioprosthetic-heart-valve-thrombosis-after-transcatheter-aortic%C3%A2-valve-replacement-incidence-characteristics-and-treatment-outcomes
#12
John Jose, Dmitriy S Sulimov, Mohamed El-Mawardy, Takao Sato, Abdelhakim Allali, Erik W Holy, Björn Becker, Martin Landt, Julia Kebernik, Bettina Schwarz, Gert Richardt, Mohamed Abdel-Wahab
OBJECTIVES: The aim of this study was to determine the incidence, characteristics, and treatment outcomes of patients diagnosed with clinical transcatheter heart valve thrombosis. BACKGROUND: Limited data exists on clinical or manifest transcatheter heart valve thrombosis. Prior studies have focused on subclinical thrombosis. METHODS: A retrospective analysis was conducted of prospectively collected data from a single-center registry that included 642 consecutive patients who underwent transcatheter aortic valve replacement between 2007 and 2015 (305 patients had self-expanding valves; balloon-expandable, n = 281; mechanically expanding, n = 56)...
April 10, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28379385/five-year-evolution-of-mild-aortic-regurgitation-following-transcatheter-aortic-valve-implantation-early-insights-from-a-single-centre-experience
#13
Nicola Buzzatti, Alessandro Castiglioni, Eustachio Agricola, Marta Barletta, Stefano Stella, Francesco Giannini, Damiano Regazzoli, Antonio Mangieri, Marco Ancona, Pietro Spagnolo, Alaide Chieffo, Matteo Montorfano, Ottavio Alfieri, Antonio Colombo, Azeem Latib
OBJECTIVES: To assess the follow-up evolution and impact of mild aortic regurgitation (1 + AR) following transcatheter aortic valve implantation (TAVI). METHODS: We evaluated the follow-up outcomes and AR evolution of 558 patients affected by native aortic stenosis who underwent TAVI with residual AR ≤ 1+. RESULTS: No residual AR was found in 294 (52.7%) patients, whereas 1 + AR was found in 264 (47.3%) patients. At 5.5 years, freedom from all-cause mortality (56...
March 31, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28377507/an-epigenetic-regulatory-loop-controls-pro-osteogenic-activation-by-tgf-%C3%AE-1-or-bone-morphogenetic-protein-2-in-human-aortic-valve-interstitial-cells
#14
Rui Song, David A Fullerton, Lihua Ao, Ke-Seng Zhao, Xianzhong Meng
Calcific aortic valve disease (CAVD) is common in the elderly population, but pharmacological interventions for managing valvular calcification are unavailable. Transforming growth factor beta 1 (TGF-β1) and bone morphogenetic protein 2 (BMP-2) induce pro-osteogenic activation of human aortic valve interstitial cells (AVICs) that play an important role in valvular calcification. However, the molecular mechanism underlying pro-osteogenic activation in AVICs is incompletely understood. Here, we investigated an epigenetic regulatory mechanism in human AVIC pro-osteogenic activation induced by TGF-β1 and BMP-2...
April 4, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28369223/severe-aortic-stenosis-with-low-aortic-valve-calcification-characteristics-and-outcome-following-transcatheter-aortic-valve-implantation
#15
Yigal Abramowitz, Hasan Jilaihawi, Philippe Pibarot, Tarun Chakravarty, Mohammad Kashif, Yoshio Kazuno, Yoshio Maeno, Hiroyuki Kawamori, Geeteshwar Mangat, John Friedman, Wen Cheng, Raj R Makkar
Aims: High aortic valve calcification (AVC) assessed with CT may be used to differentiate between severe and non-severe aortic stenosis (AS). Nonetheless, in some cases patients with low calcification are diagnosed with haemodynamically severe AS. The prevalence, mechanism of valve stenosis and implications for transcatheter aortic valve implantation (TAVI) of low AVC severe AS remain unclear. We assessed the clinical and haemodynamic characteristics and the outcome of patients with severe AS and low AVC that undergo TAVI...
March 27, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28366467/aortic-root-replacement-for-children-with-loeys-dietz-syndrome
#16
Nishant D Patel, Diane Alejo, Todd Crawford, Narutoshi Hibino, Harry C Dietz, Duke E Cameron, Luca A Vricella
BACKGROUND: Loeys-Dietz syndrome (LDS) is an aggressive aortopathy with a proclivity for aortic aneurysm rupture and dissection at smaller diameters than other connective tissue disorders. We reviewed our surgical experience of children with LDS to validate our guidelines for prophylactic aortic root replacement (ARR). METHODS: We reviewed all children (younger than 18 years) with a diagnosis of LDS who underwent ARR at our institution. The primary endpoint was mortality, and secondary endpoints included complications and the need for further interventions...
March 30, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28362018/il-37-suppresses-myd88-mediated-inflammatory-responses-in-human-aortic-valve-interstitial-cells
#17
Qiong Zhan, Qingchun Zeng, Rui Song, Yufeng Zhai, Dingli Xu, David A Fullerton, Charles A Dinarello, Xianzhong Meng
BACKGROUND: Calcific aortic valve disease (CAVD) is common among the elderly, and aortic valve interstitial cells (AVICs) exhibit unique inflammatory and osteogenic responses to pro-inflammatory stimulation which play an important role in valvular fibrosis and calcification. Thus, suppression of AVIC pro-inflammatory response may have therapeutic utility for prevention of CAVD progression. Interleukin (IL)-37, an anti-inflammatory cytokine, reduces tissue inflammation. OBJECTIVE: This study was to test the hypothesis that IL-37 suppresses human AVIC inflammatory responses to Toll-like receptor (TLR) agonists...
March 27, 2017: Molecular Medicine
https://www.readbyqxmd.com/read/28360193/a-role-for-galectin-3-in-the-development-of-early-molecular-alterations-in-short-term-aortic-stenosis
#18
Vanessa Arrieta, Ernesto Martínez-Martínez, Jaime Ibarrola, Virginia Alvarez, Rafael Justo Sádaba, Amaia García-Peña, Amaya Fernández-Celis, Victoria Cachofeiro, Patrick Rossignol, Natalia Lopez-Andres
Aortic stenosis (AS) is characterized by pressure overload and causes left ventricular (LV) fibrosis and inflammation, two mechanisms which finally lead to cardiac dysfunction. Galectin-3 (Gal-3), a β-galactoside-binding lectin, promotes cardiac remodeling. We herein investigated the role of Gal-3 in LV remodeling in patients with AS and the effects of Gal-3 blockade in rats subjected to short-term (6-week) supravalvular aortic banding (AS group). Myocardial biopsies were obtained from 25 patients with severe AS referred for aortic valve replacement and from necropsies of 11 cardiovascular disease-free control subjects...
March 30, 2017: Clinical Science (1979-)
https://www.readbyqxmd.com/read/28359490/how-could-these-mini-saccular-aneurysms-of-ascending-aorta-be-classified
#19
Anas Sarraj, Daniel-Edgardo Muñoz, Corazón-Mabel Calle Valda, Emilio Monguio, Guillermo Reyes
The wall of a true aneurysm is composed of all histologic layers of the aorta. A false aneurysm represents a small, contained rupture of aorta followed by bulging of the corresponding area that is usually sustained by a fibrous peel. Aortic dissection is defined as a separation of the lamellae of the aortic wall. Herein, we describe an unusual clinical presentation of aortic dissection in a 37-year-old male patient that presented severe aortic regurgitation and unusual bulges with linear intimal fissures in ascending aorta underwent mechanical aortic valve replacement and interposition of tubular vascular graft in ascending aorta...
April 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28356268/neurotrophin-3-up-regulates-proliferation-and-collagen-production-in-human-aortic-valve-interstitial-cells-a-potential-role-in-aortic-valve-sclerosis
#20
Qingzhou Yao, Rui Song, Lihua Ao, Joseph C Cleveland, David A Fullerton, Xianzhong Meng
Calcific aortic valve disease (CAVD) is a leading cardiovascular disorder in the elderly. Diseased aortic valves are characterized by sclerosis (fibrosis) and nodular calcification. Sclerosis, an early pathological change, is caused by aortic valve interstitial cell (AVIC) proliferation and over-production of extracellular matrix (ECM) proteins. However, the mechanism of aortic valve sclerosis remains unclear. Recently, we observed that diseased human aortic valves over-express growth factor neurotrophin 3 (NT3)...
March 29, 2017: American Journal of Physiology. Cell Physiology
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