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Heart valve diameter

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https://www.readbyqxmd.com/read/29736853/is-mri-equivalent-to-ct-in-the-guidance-of-tavr-a-pilot-study
#1
Agnes Mayr, Gert Klug, Sebastian J Reinstadler, Hans-Josef Feistritzer, Martin Reindl, Christian Kremser, Christof Kranewitter, Nikolaos Bonaros, Guy Friedrich, Gudrun Feuchtner, Bernhard Metzler
OBJECTIVES: To compare a comprehensive cardiovascular magnetic resonance imaging (MRI) protocol with contrast-enhanced computed tomography angiography (CTA) for guidance in transcatheter aortic valve replacement (TAVR) evaluation. METHODS AND RESULTS: Non-contrast three-dimensional (3D) 'whole heart' MRI imaging for aortic annulus sizing and measurements of coronary ostia heights, contrast-enhanced MRI angiography (MRA) for evaluation of transfemoral routes as well as aortoiliofemoral-CTA were performed in 16 patients referred for evaluation of TAVR...
May 7, 2018: European Radiology
https://www.readbyqxmd.com/read/29733826/pulmonary-valve-replacement-a-single-institution-comparison-of-surgical-and-transcatheter-valves
#2
Vikas Sharma, Eric R Griffiths, Aaron W Eckhauser, Robert G Gray, Mary H Martin, Chong Zhang, Angela P Presson, Phillip T Burch
BACKGROUND: Transcatheter pulmonary valve replacement (TPVR) is increasingly utilized to address residual or recurrent right ventricular outflow tract pathology in congenital heart disease patients. We aimed to evaluate clinical outcomes and resource utilization comparing TPVR to surgical pulmonary valve replacement (SPVR) for this patient population. METHODS: From January 2010 until December 2015, 224 patients underwent pulmonary valve replacement (SPVR n=100 and TPVR n=124)...
May 4, 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29730689/right-heart-dilatation-in-a-fetus-with-an-abnormal-foramen-ovale-valve-an-indicator-of-interatrial-communication-restriction
#3
Wenjia Lei, Miao Fan, Meilian Wang, Yu Wang, Wei Sun, Xue Sun, Ying Zhang
AIMS: Foramen ovale (FO) valve with a shape or motion abnormality is frequently detected during routine obstetric ultrasonic examinations. However, the hemodynamics mechanism of this entity remains unclear. The purpose of the study is to determine the relevance of interatrial communication restriction and resultant morphological modifications. MATERIALS AND METHODS: We reviewed the echocardiographic records of fetuses with isolated abnormal FO valve evaluated between January of 2010 and december of 2016...
May 2, 2018: Medical Ultrasonography
https://www.readbyqxmd.com/read/29724595/effect-of-tricuspid-annuloplasty-concomitant-with-left-heart-surgery-on-right-heart-geometry-and-function
#4
Tomoki Sakata, Kenji Mogi, Manabu Sakurai, Anan Nomura, Masahiko Fujii, Daisuke Kaneyuki, Goro Matsumiya, Yoshiharu Takahara
OBJECTIVES: To elucidate the effect of tricuspid annuloplasty concomitant with left-sided valve surgery on the right heart in patients with mild or more tricuspid regurgitation (TR). METHODS: We enrolled 78 patients with mild or more TR who underwent left-sided valve surgery. Forty-three patients underwent only left-sided valve surgery (group non-T) and 35 underwent concomitant tricuspid annuloplasty (group T). Echocardiographic changes between the preoperative and 1-year follow-up periods were compared...
April 3, 2018: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29688192/-modern-polyurethanes-in-cardiovascular-surgery
#5
A A Gostev, P P Laktionov, A A Karpenko
Currently, there is great clinical demand for synthetic tissue-engineered cardiovascular prostheses with good long-term patency. Polyurethanes belong to the class of polymers with excellent bio- and hemocompatibility. They are known to possess good mechanical properties, but are prone to processes of degradation in conditions of functioning in living organisms. Attempts at solving this problem have resulted in the development of various new subclasses of polyurethanes such as thermoplastic polyether polyurethanes, polyurethanes with a silicone segment, polycarbonate polyurethanes and nanocomposite polyurethanes...
2018: Angiologii︠a︡ i Sosudistai︠a︡ Khirurgii︠a︡, Angiology and Vascular Surgery
https://www.readbyqxmd.com/read/29673504/usefulness-of-tricuspid-annular-diameter-to-predict-late-right-sided-heart-failure-in-patients-with-left-ventricular-assist-device
#6
Koki Nakanishi, Shunichi Homma, Jiho Han, Hiroo Takayama, Paolo C Colombo, Melana Yuzefpolskaya, Arthur R Garan, Maryjane A Farr, Paul Kurlansky, Marco R Di Tullio, Yoshifumi Naka, Koji Takeda
Although late-onset right-sided heart failure is recognized as a clinical problem in the treatment of patients with left ventricular assist devices (LVADs), the mechanism and predictors are unknown. Tricuspid valve (TV) deformation leads to the restriction of the leaflet motion and decreased coaptation, resulting in a functional tricuspid regurgitation that may act as a surrogate marker of late right-sided heart failure. This study aimed to investigate the association of preoperative TV deformation (annulus dilatation and leaflet tethering) with late right-sided heart failure development after continuous-flow LVAD implantation...
March 28, 2018: American Journal of Cardiology
https://www.readbyqxmd.com/read/29664732/fibrous-composite-material-for-textile-heart-valve-design-in-vitro-assessment
#7
Amna Amri, Gaetan Laroche, Nabil Chakfe, Frederic Heim
With over 150,000 implantations performed over the world, transcatheter aortic valve replacement (TAVR) has become a surgical technique, which largely competes with open surgery valve replacement for an increasing number of patients. The success of the procedure favors the research toward synthetic valve leaflet materials as an alternative to biological tissues, whose durability remains unknown. In particular, fibrous constructions have recently proven to be durable in vivo over a 6-month period of time in animal sheep models...
April 17, 2018: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/29622967/the-value-of-urotensin-ii-in-patients-with-left-sided-rheumatic-valvular-regurgitation
#8
Ibrahim Elmadbouh, Mahmoud Ali Soliman, Ahmed Abdallah Mostafa, Haitham Ahmed Heneish
Aims: Rheumatic valve diseases are most common etiological valve diseases in developing countries. Urotensin II is cardiovascular autacoid/hormone and may be associated with patients of heart valve diseases. The present study was to measure plasma urotensin II concentrations in patients with left-sided rheumatic valve diseases such as mitral regurgitation (MR) and aortic regurgitation (AR), and to examine its correlation with severity of valve impairment, function (New York Heart association, NYHA) class and pulmonary artery pressure (PAP)...
June 2017: The Egyptian heart journal: (EHJ): official bulletin of the Egyptian Society of Cardiology
https://www.readbyqxmd.com/read/29617784/the-influence-of-different-inflow-configurations-on-computational-fluid-dynamics-in-a-novel-three-leaflet-mechanical-heart-valve-prosthesis
#9
Hans-Hinrich Sievers, Kathrin Schubert, Ashkan Jamali, Michael Scharfschwerdt
OBJECTIVES: A novel mechanical heart valve was developed with a special focus on avoiding anticoagulation. Computational fluid dynamics were used for the research design. Here, the effect of different anatomical inflow geometries on flow characteristics is evaluated. METHODS: Flow and pressure simulations were performed on a novel 3-leaflet mechanical heart valve in a fully open position at 2 flow rates related to the peak and end-systolic flow. The computational fluid dynamics model was designed according to 4 different (1 cylindrical, 3 conical with increasing diameter) anatomical configurations of the left ventricular outflow tract derived from an inverse heart model...
March 30, 2018: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29592957/intra-cardiac-release-of-extracellular-vesicles-shapes-inflammation-following-myocardial-infarction
#10
Xavier Loyer, Ivana Zlatanova, Cécile Devue, Min Yin, Kiave-Yune Howangyin, Phatchanat Klaihmon, Coralie L Guerin, Marouane Kheloufi, José Vilar, Konstantinos Zannis, Bernd K Fleischmann, Do Won Hwang, Jongmin Park, Hakho Lee, Philippe Menasche, Jean-Sébastien Silvestre, Chantal M Boulanger
<u>Rationale:</u> A rapid and massive influx of inflammatory cells occurs into ischemic area following myocardial infarction, resulting in local release of cytokines and growth factors. Yet, the mechanisms regulating their production are not fully explored. The release of extracellular vesicles (EV) in the interstitial space curbs important biological functions, including inflammation, and influences the development of cardiovascular diseases. So far, there is no evidence for in situ release of cardiac EVs following myocardial infarction...
March 28, 2018: Circulation Research
https://www.readbyqxmd.com/read/29580628/prognostic-usefulness-of-tricuspid-annular-diameter-for-cardiovascular-events-in-patients-with-tricuspid-regurgitation-of-moderate-to-severe-degree
#11
Hyungseop Kim, In-Cheol Kim, Hyuck-Jun Yoon, Hyoung-Seob Park, Yun-Kyeong Cho, Chang-Wook Nam, Seongwook Han, Seung-Ho Hur, Yoon-Nyun Kim
Functional tricuspid regurgitation (TR) is frequently encountered. Current guidelines recommend the surgical correction of severe TR only at the time of left valve surgery despite emphasizing the enlarged tricuspid annulus (TA) dimension. We attempted to evaluate the relation between TA dimension and clinical outcomes of moderate or severe TR. A total of 213 patients (mean age 68 years, women 68%) with moderate or severe TR secondary to left-sided valve surgery, nonvalvular disease, or isolated primary TR were retrospectively identified and classified into tertiles of TA dimension...
March 2, 2018: American Journal of Cardiology
https://www.readbyqxmd.com/read/29574918/ginsenoside-rb1-inhibits-autophagy-through-regulation-of-rho-rock-and-pi3k-mtor-pathways-in-a-pressure-overload-heart-failure-rat-model
#12
Tianrui Yang, Yunbo Miao, Tong Zhang, Ninghui Mu, Libo Ruan, Jinlan Duan, Ying Zhu, Rongping Zhang
OBJECTIVE: This study was designed to explore the relationship between ginsenoside Rb1 (Grb1) and high-load heart failure (HF) in rats. METHODS: The parameters of cardiac systolic function (left ventricular posterior wall thickness (LVPWT), left ventricular internal diastolic diameter (LVID), fraction shortening (FS) and mitral valves (MVs)) of rat hearts in each group were inspected by echocardiogram. The expressions of rat myocardial contractile proteins, autophagy-related proteins and the activation of Rho/ROCK and PI3K/mTOR pathways were detected by Western blot...
June 2018: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/29570209/long-term-outcomes-of-mitral-valve-annuloplasty-versus-subvalvular-sparing-replacement-for-severe-ischemic-mitral-regurgitation
#13
Baotong Li, Hengchao Wu, Hansong Sun, Jianping Xu, Yunhu Song, Wei Wang, Shuiyun Wang
BACKGROUND: Although practice guidelines recommend surgery for patients with severe chronic ischemic mitral regurgitation (CIMR), they do not specify whether to repair or replace the mitral valve. The purpose of this study was to evaluate the long-term outcomes in patients with severe CIMR undergoing mitral valve annuloplasty (MVA) versus subvalvular sparing mitral valve replacement (MVR). METHODS: 392 consecutive patients who underwent MVA or subvalvular sparing MVR for treatment of severe CIMR were retrospectively reviewed...
March 23, 2018: Cardiology Journal
https://www.readbyqxmd.com/read/29566140/conventional-aortic-valve-replacement-in-2005-elderly-patients-a-32-year-experience
#14
Thierry Langanay, Simon Rouzé, Jacques Tomasi, Marie Aymami, Syed M Rehman, Amedeo Anselmi, Hervé Corbineau, Erwan Flécher, Yves Logeais, Alain Leguerrier, Jean-Philippe Verhoye
OBJECTIVES: Considering the good immediate results reported for transcatheter aortic valve implantation in high-risk patients, the role of conventional aortic valve replacement (AVR) is being questioned, especially in elderly patients. The aim of this study was to evaluate our long-term results of conventional AVR in octogenarians. METHODS: A total of 2005 patients aged ≥80 years underwent AVR for aortic stenosis in our institution between 1978 and 2011. Of these, 1009 (50%) patients had an associated extracardiac comorbidity and 650 (32%) patients had coronary lesions...
March 16, 2018: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/29547668/three-dimensional-flow-structures-past-a-bio-prosthetic-valve-in-an-in-vitro-model-of-the-aortic-root
#15
David Hasler, Dominik Obrist
The flow field past a prosthetic aortic valve comprises many details that indicate whether the prosthesis is functioning well or not. It is, however, not yet fully understood how an optimal flow scenario would look, i.e. which subtleties of the fluid dynamics in place are essential regarding the durability and compatibility of a prosthetic valve. In this study, we measured and analyzed the 3D flow field in the vicinity of a bio-prosthetic heart valve in function of the aortic root size. The measurements were conducted within aortic root phantoms of different size, mounted in a custom-built hydraulic setup, which mimicked physiological flow conditions in the aorta...
2018: PloS One
https://www.readbyqxmd.com/read/29520970/determinants-of-success-and-hemodynamic-impact-of-balloon-postdilatation-of-self-expanding-transcatheter-aortic-valves
#16
Mohammad Abdelghani, Robbert J de Winter, Yosuke Miyazaki, Rodrigo Modolo, Hiroki Tateishi, Rafael Cavalcante, Rogério Sarmento-Leite, José A Mangione, Alexandre Abizaid, Osama I I Soliman, Yoshinobu Onuma, Pedro A Lemos, Patrick W Serruys, Fabio S de Brito
OBJECTIVES: To explore the rate, the determinants of success, and the hemodynamic impact of balloon postdilatation (BPD) of self-expanding transcatheter heart valves (SE-THVs) BACKGROUND: BPD is commonly used to optimize valve expansion and reduce paravalvular leakage (PVL) after transcatheter aortic valve implantation (TAVI) without clearly knowing its hemodynamic benefits. METHODS: Patients (n = 307) who received a SE-THV were stratified according to whether a BPD was performed or not...
March 9, 2018: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/29515986/aorto-right-ventricular-tunnel-in-transposition-of-the-great-arteries
#17
Antonio F Corno, Saravanan Durairaj, Robert H Anderson
Aorto-ventricular tunnel is an extremely rare congenital heart defect, consisting of failure of attachment of an aortic leaflet along the semilunar hinge. In all published reports the leaflet involved was either the right coronary leaflet, most frequently, or the left coronary leaflet, in most of the cases opening toward the left ventricle, with only one-eighth of the reported cases communicating with the right ventricle. Treatment of the aorto-ventricular tunnel has been anecdotally reported by interventional closure with a device and more frequently with surgical approach, either as an isolated malformation or as associated lesions...
2018: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/29511194/genome-wide-analysis-yields-new-loci-associating-with-aortic-valve-stenosis
#18
Anna Helgadottir, Gudmar Thorleifsson, Solveig Gretarsdottir, Olafur A Stefansson, Vinicius Tragante, Rosa B Thorolfsdottir, Ingileif Jonsdottir, Thorsteinn Bjornsson, Valgerdur Steinthorsdottir, Niek Verweij, Jonas B Nielsen, Wei Zhou, Lasse Folkersen, Andreas Martinsson, Mahyar Heydarpour, Siddharth Prakash, Gylfi Oskarsson, Tomas Gudbjartsson, Arnar Geirsson, Isleifur Olafsson, Emil L Sigurdsson, Peter Almgren, Olle Melander, Anders Franco-Cereceda, Anders Hamsten, Lars Fritsche, Maoxuan Lin, Bo Yang, Whitney Hornsby, Dongchuan Guo, Chad M Brummett, Gonçalo Abecasis, Michael Mathis, Dianna Milewicz, Simon C Body, Per Eriksson, Cristen J Willer, Kristian Hveem, Christopher Newton-Cheh, J Gustav Smith, Ragnar Danielsen, Gudmundur Thorgeirsson, Unnur Thorsteinsdottir, Daniel F Gudbjartsson, Hilma Holm, Kari Stefansson
Aortic valve stenosis (AS) is the most common valvular heart disease, and valve replacement is the only definitive treatment. Here we report a large genome-wide association (GWA) study of 2,457 Icelandic AS cases and 349,342 controls with a follow-up in up to 4,850 cases and 451,731 controls of European ancestry. We identify two new AS loci, on chromosome 1p21 near PALMD (rs7543130; odds ratio (OR) = 1.20, P = 1.2 × 10-22 ) and on chromosome 2q22 in TEX41 (rs1830321; OR = 1.15, P = 1.8 × 10-13 )...
March 7, 2018: Nature Communications
https://www.readbyqxmd.com/read/29497612/cardiovascular-imaging-techniques-in-systemic-rheumatic-diseases
#19
REVIEW
Fabiola Atzeni, Marco Corda, Luigi Gianturco, Maurizio Porcu, Piercarlo Sarzi-Puttini, Maurizio Turiel
The risk of cardiovascular (CV) events and mortality is significantly higher in patients with systemic rheumatic diseases than in the general population. Although CV involvement in such patients is highly heterogeneous and may affect various structures of the heart, it can now be diagnosed earlier and promptly treated. Various types of assessments are employed for the evaluation of CV risk such as transthoracic or transesophageal echocardiography, magnetic resonance imaging (MRI), and computed tomography (CT) to investigate valve abnormalities, pericardial disease, and ventricular wall motion defects...
2018: Frontiers in Medicine
https://www.readbyqxmd.com/read/29478744/tricuspid-annulus-diameter-does-not-predict-the-development-of-tricuspid-regurgitation-after-mitral-valve-repair-for-mitral-regurgitation-due-to-degenerative-diseases
#20
Tirone E David, Carolyn M David, Cedric Manlhiot
BACKGROUND: Heart valve surgery guidelines suggest that tricuspid valve annuloplasty may be beneficial in patients with a tricuspid annulus (TA) ≥40 mm even in the absence of functional tricuspid regurgitation (TR) at the time of surgery for left-sided valve lesions (class 2a). Given the broad spectrum of degenerative diseases that affect the atrioventricular valves, we hypothesize that this measurement might not be predictive of TR after mitral valve (MV) repair. METHODS: The diameter of the TA was measured preoperatively in a cohort of 312 consecutive patients who had isolated MV repair for degenerative diseases...
February 1, 2018: Journal of Thoracic and Cardiovascular Surgery
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