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Cardiac valve anatomy

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https://www.readbyqxmd.com/read/29102273/hemodynamic-assessment-of-extra-cardiac-tricuspid-valves-using-particle-image-velocimetry
#1
Munirah Ismail, Foad Kabinejadian, Yen Ngoc Nguyen, Edgar Tay Lik Wui, Sangho Kim, Hwa Liang Leo
There has not been much progress in the development of transcatheter tricuspid valves to treat tricuspid regurgitation because of the difficulty in anchoring a stented valve onto the complex tricuspid annulus. Hence, the concept of heterotopic implantation of the transcatheter tricuspid valve onto the cavo-atrial junction was proposed. However, to date there has been no detailed in vitro investigation of the hemodynamic performance of this new device. The study utilises both 2-D and 3-D particle image velocimetry (PIV) to interrogate the flow patterns in the vicinity of the extra-cardiac tricuspid valves in an in vitro physiological flow loop, specifically at four measurement locations in the cavo-atrial anatomy...
December 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/29092127/iatrogenic-lutembacher-syndrome-after-percutaneous-mitral-commissurotomy
#2
Theodoros D Karamitsos, Chrysovalantou Nikolaidou, Athanasios Koutsakis, Kyriakos Anastasiadis, Charalambos Karvounis, Stavros Hadjimiltiades
Atrial septal defects (ASDs) are common immediately after percutaneous mitral commissurotomy (PMC). They are usually small, hemodynamically insignificant, and tend to decrease or disappear within 6 to 12 months. Herein, a case is described of persistent ASD in a patient with mitral valve stenosis who had undergone successful PMC three years previously. The patient had signs and symptoms of right heart failure and severe tricuspid regurgitation (TR) with borderline right ventricular systolic function on echocardiography, in addition to the ASD...
May 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/29027267/percutaneous-repair-of-severe-mitral-valve-regurgitation-secondary-to-chordae-rupture-in-octogenarians-using-mitraclip
#3
Nicolas Geis, Philip Raake, Derliz Mereles, Emmanuel Chorianopoulos, Gabor Szabo, Hugo A Katus, Raffi Bekeredjian, Sven T Pleger
OBJECTIVES: The aim of this study was to assess feasibility and clinical effectiveness of the MitraClip device in octogenarians suffering from severe mitral valve regurgitation due to chordae rupture. BACKGROUND: The MitraClip procedure is a suitable technique in high-risk surgical patients to achieve safe and effective percutaneous repair of mitral valve regurgitation. Octogenarians show cumulative risk and social aspects hindering mitral valve surgery. No data exists regarding the use of the MitraClip device in high-risk octogenarians suffering from mitral valve chordae rupture...
October 12, 2017: Journal of Interventional Cardiology
https://www.readbyqxmd.com/read/28963047/first-case-of-2-synchronous-gluteal-arteries-aneurysms-treated-by-endovascular-plug-embolization-case-report-and-literature-review
#4
Andrea Esposito, Danilo Menna, Matteo Salcuni, Ferdinando Di Leo, Pietro Benedetto, Antonio Trani, Antonino Pierluigi Cappiello
INTRODUCTION: Gluteal artery aneurysms (GAAs) are rare, accounting for less than 1% of all arterial aneurysms. Most of them are post-traumatic in nature and involve the superior gluteal artery (SGA), while injuries of the inferior gluteal artery (IGA) have been reported less frequently. We report an unusual case of a patient with double saccular GAA of unknown etiology, involving both the SGA and IGA, successfully treated by endovascular embolization. CASE REPORT: A 80-year-old man referred to our hospital complaining of the progressive onset of left buttock pain and swelling exacerbated by sitting position in the last 4 months...
September 28, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28945128/comparison-of-left-and-right-ventricular-stroke-volume-of-dogs-calculated-on-the-basis-of-morphology-and-blood-flow-determined-by-use-of-cardiac-magnetic-resonance-imaging
#5
Matthias Dennler, Henning Richter, José Novo Matos, Marco Baron Toaldo, Ivo U Campagna, Tony M Glaus, Patrick R Kircher
OBJECTIVE To compare stroke volume (SV) calculated on the basis of cardiac morphology determined by MRI and results of phase-contrast angiography (PCA) of ventricular inflow and outflow in dogs. ANIMALS 10 healthy Beagles. PROCEDURES Cardiac MRI was performed twice on each Beagle. Cine gradient echo sequences of both ventricles in short-axis planes were used for morphological quantification of SVs by assessment of myocardial contours. From the long-axis plane, SVs in 4-chamber and left ventricular 2-chamber views were acquired at end diastole and end systole...
October 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28942390/imaging-for-structural-heart-procedures-focus-on-computed-tomography
#6
John Mooney, Stephanie L Sellers, Mickaël Ohana, João L Cavalcante, Chesnal D Arepalli, Rominder Grover, Ung Kim, Kapilan Selvakumar, Philipp Blanke, Jonathon A Leipsic
The success and continued rapid clinical integration of transcatheter valve technologies relies on imaging modalities to guide safe and effective device deployment. In particular, cardiac imaging, using both echocardiography and CT, is an integral resource for the multidisciplinary team. These modalities can provide valuable insight for the proceduralist at each stage of transcatheter-based valve insertion, as they can be used reliably to define the anatomy of interest and its relationship to surrounding structures, determine accurate device sizing, assess patients for valve-in-valve procedures, and screen for adverse features or procedural contraindications...
September 24, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28935463/image-guidance-for-transcatheter-aortic-valve-implantation-tavi-and-cerebral-embolic-protection
#7
I Vernikouskaya, W Rottbauer, B Gonska, C Rodewald, J Seeger, V Rasche, J Wöhrle
The study was aimed at evaluation of the feasibility and potential benefit of image fusion (IF) of pre-procedural CT angiography (CTA) and x-ray (XR) fluoroscopy for image-guided navigation in transfemoral transcatheter aortic valve implantation (TAVI) with the strong focus on guiding the double-filter cerebral embolic protection device and valve prosthesis placement. METHODS: In 31 patients undergoing TAVI, image registration of CTA-derived 3D anatomical models of the relevant cardiac anatomy and vasculature, and live XR was performed applying a commercially available navigation tool...
December 15, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28895301/early-leaflet-thrombosis-complicating-transcatheter-implantation-of-a-sapien-3-valve-in-a-native-right-ventricular-outflow-tract
#8
Mounir Riahi, Philipp Blanke, John Webb, Ronald G Carere
A 59-year-old female with Tetralogy of Fallot had a previous complete repair with RVOT patch enlargement. She developed subsequent severe symptomatic (NYHA III) pulmonary regurgitation with severe RV dilatation. She had a concomitant interstitial lung disease secondary to hypersensitivity pneumonitis that precluded her from cardiac surgery. After preprocedural assessment using computed tomography, echocardiography and invasive angiography we decided to implant a 29 mm Edwards Sapien 3 valve without pre-stenting...
September 12, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28881023/double-outlet-left-ventricle-with-a-bicuspid-pulmonary-valve-and-aortic-coarctation
#9
Feifei Sun, Miao Fan, Liping Huang, Weidong Ren, Dongyu Li
A double-outlet left ventricle (DOLV) is a rare congenital cardiac malformation. Here, we describe a case of DOLV with bicuspid pulmonary valve, aortic coarctation, and a subpulmonary ventricular septal defect in which both ventricles were well developed. The anatomic features were observed with echocardiography, and the diagnosis was confirmed at surgery. Many variations of DOLV have been described. The features of our case expand the spectrum of this entity and may provide new insight into its complex anatomy...
September 7, 2017: Journal of Clinical Ultrasound: JCU
https://www.readbyqxmd.com/read/28860895/a-review-of-the-use-of-cardiac-computed-tomography-for-evaluating-the-mitral-valve-before-and-after-mitral-valve-repair
#10
Jong Hun Kim, Eun Young Kim, Gong Yong Jin, Jong Bum Choi
The role of cardiac computed tomography (CT) for evaluating the mitral valve (MV) has been limited since echocardiography is the main method of evaluation. However, recent advances in cardiac CT have enable detailed evaluation of the anatomy and geometry of the MV. We describe assessments of the anatomy and coaptation geometric parameters of normal MVs, and also review repair of diseased/damaged MV. We also discuss pre- and post-surgical imaging of MV pathology using cardiac CT and various CT images. We found that cardiac CT could be used as an alternative imaging modality to echocardiography for pre-operative MV evaluation and to predict clinical outcomes following repair...
September 2017: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/28800987/dynamic-three-dimensional-geometry-of-the-aortic-valve-apparatus-a-feasibility-study
#11
Arash Khamooshian, Yannis Amador, Ting Hai, Jelliffe Jeganathan, Maria Saraf, Eitezaz Mahmood, Robina Matyal, Kamal R Khabbaz, Massimo Mariani, Feroze Mahmood
OBJECTIVE: To provide (1) an overview of the aortic valve (AV) apparatus anatomy and nomenclature, and (2) data regarding the normal AV apparatus geometry and dynamism during the cardiac cycle obtained from three-dimensional transesophageal echocardiography (3D TEE). DESIGN: Retrospective feasibility study. SETTING: A single-center university teaching hospital. PARTICIPANTS: The study was performed on data of 10 patients with a nonregurgitant, nonstenotic aortic valve undergoing cardiac surgery...
August 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28782496/morphological-three-dimensional-analysis-of-papillary-muscles-in-borderline-left-ventricles
#12
Mari N Velasco Forte, Mohamed Nassar, Nick Byrne, Miguel Silva Vieira, Israel V Pérez, Bram Ruijsink, John Simpson, Tarique Hussain
OBJECTIVE: Mitral valve anatomy has a significant impact on potential surgical options for patients with hypoplastic or borderline left ventricle. Papillary muscle morphology is a major component regarding this aspect. The purpose of this study was to use cardiac magnetic resonance to describe the differences in papillary muscle anatomy between normal, borderline, and hypoplastic left ventricles. METHODS: We carried out a retrospective, observational cardiac magnetic resonance study of children (median age 5...
September 2017: Cardiology in the Young
https://www.readbyqxmd.com/read/28760682/the-bulbus-arteriosus-of-the-holocephalan-heart-gross-anatomy-histomorphology-pigmentation-and-evolutionary-significance
#13
Cristina Rodríguez, Miguel Lorenzale, Miguel A López-Unzu, Borja Fernández, Francisca Salmerón, Valentín Sans-Coma, Ana C Durán
This study was designed to determine whether the outflow tract of the holocephalan heart is composed of a myocardial conus arteriosus and a non-myocardial bulbus arteriosus, as is the case in elasmobranchs. This is a key issue to verify the hypothesis that these two anatomical components existed from the onset of the jawed vertebrate radiation. The Holocephali are the sister group of the elasmobranchs, sharing with them a common, still unknown Palaeozoic ancestor. The sample examined herein consisted of hearts from individuals of four species, two of them belonging to the Chimaeridae and the other two to the Rhinochimaeridae...
August 2017: Zoology: Analysis of Complex Systems, ZACS
https://www.readbyqxmd.com/read/28728865/mass-spring-models-for-the-simulation-of-mitral-valve-function-looking-for-a-trade-off-between-reliability-and-time-efficiency
#14
O A Pappalardo, F Sturla, F Onorati, G Puppini, M Selmi, G B Luciani, G Faggian, A Redaelli, E Votta
Patient-specific finite element (FE) models can assess the impact of mitral valve (MV) repair on the complex MV anatomy and function. However, FE excessive time requirements hamper their use for surgical planning; mass-spring models (MSMs) represent a more approximate approach but can provide almost real-time simulations. On this basis, we implemented MSMs of three healthy MVs from cardiac magnetic resonance (cMR) imaging to simulate the systolic MV closure, including the in vivo papillary muscles and annular kinematics, and the anisotropic and non-linear mechanical response of MV tissues...
July 17, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28706872/surgical-management-of-tricuspid-stenosis
#15
REVIEW
Marisa Cevasco, Prem S Shekar
Tricuspid valve stenosis (TS) is rare, affecting less than 1% of patients in developed nations and approximately 3% of patients worldwide. Detection requires careful evaluation, as it is almost always associated with left-sided valve lesions that may obscure its significance. Primary TS is most frequently caused by rheumatic valvulitis. Other causes include carcinoid, radiation therapy, infective endocarditis, trauma from endomyocardial biopsy or pacemaker placement, or congenital abnormalities. Surgical management of TS is not commonly addressed in standard cardiac texts but is an important topic for the practicing surgeon...
May 2017: Annals of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/28706865/echocardiography-of-the-tricuspid-valve-acknowledgements
#16
Jamahal Luxford, Levi Bassin, Michael D'Ambra
The tricuspid valve (TV), although occasionally considered "neglected" is the subject of renewed and increasing interest. Factors include an awareness that tricuspid value dysfunction is influential in patient outcomes, an improving understanding of valve anatomy and function and evolving techniques available to address tricuspid regurgitation. Tricuspid regurgitation (TR) can be classified as being due to primary diseases of the valve or functional in nature, with the majority being functional. Whilst it was previously believed that such functional TR, resulting from left sided disease, would resolve after correction of the underlying pathology this is now known not to be true...
May 2017: Annals of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/28702479/image-quality-and-contrast-agent-exposure-in-cardiac-computed-tomography-angiography-prior-to-transcatheter-aortic-valve-implantation-procedures-using-different-acquisition-protocols
#17
Nina P Hofmann, Moritz Schuetz, Raffi Bekeredjian, Sven Pleger, Emanuel Chorianopoulos, Sorin Giusca, Florian André, Gitsios Gitsioudis, Christopher Schlett, Hans-Ulrich Kauczor, Hugo A Katus, Grigorios Korosoglou
BACKGROUND: ECG-gated cardiac computed tomography angiography (CCTA) has found widespread use for prosthesis sizing before transcatheter aortic valve implantation (TAVI). However, still little data exists on the optimal scan-strategy in such patients. We hypothesized that prospectively triggered CCTA can enable the visualization of aortic valve structures and peripheral arteries with lower radiation and contrast agent exposure in patients considered for TAVI compared to retrospectively gated protocols...
2017: European Journal of Radiology Open
https://www.readbyqxmd.com/read/28678047/imaging-of-the-pulmonary-valve-in-the-adults
#18
Ricardo H Pignatelli, Cory Noel, S Chandra B Reddy
PURPOSE OF REVIEW: Pulmonary valve is the least imaged of the cardiac valves in adults. This review will address the strengths and the limitations of various imaging modalities that are commonly used for evaluation of pulmonary valve diseases in the adults. RECENT FINDINGS: Valvular pulmonary stenosis is mostly congenital and pulmonary regurgitation is usually an acquired pulmonary valve disease. Combined pulmonary stenosis and pulmonary regurgitation as sequel to previous surgeries for congenital heart diseases is the most common form of pulmonary valve disease in the adults...
July 3, 2017: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/28656518/anatomy-of-the-aortic-root-implications-for-aortic-root-reconstruction
#19
REVIEW
Takashi Kunihara
Since the introduction of valve-preserving root replacement and aortic annuloplasty, precise understanding of the aortic root anatomy has emerged as a key to successful aortic valve-preservation surgery. Fundamentally, surgeons need to know the precise anatomical definition and structure of the aortic root, including its normal dimensions, know the anatomy of the coronary arteries, and understand the cardiac conduction system. Surgeons must be able to clearly distinguish normal and abnormal structures, and recognize the effects of aortic valve regurgitation or root expansion on dimensions and geometric relationships within the aortic root...
June 27, 2017: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28652531/long-term-outcome-of-aortic-root-remodeling-for-patients-with-and-without-acute-aortic-dissection
#20
Takashi Kunihara, Niklas Neumann, Steffen Daniel Kriechbaum, Ryota Nomura, Hans-Joachim Schäfers
BACKGROUND: Valve-preserving aortic surgery is increasingly used in acute aortic dissection type A (AADA). The object of this study was to compare the long-term results of aortic root remodeling (remodeling) for patients with and without AADA.Methods and Results:Between October 1995 and December 2013, 776 patients underwent valve-preserving root replacement, of whom 59 patients with AADA (<2 weeks from onset, 56±16 years, 48 male) underwent remodeling (the remodeling-group); 7 patients had bicuspid anatomy (12%), 3 had Marfan syndrome (5%), and 1 had undergone previous cardiac surgery (2%)...
June 23, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
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