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mitral annulus

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https://www.readbyqxmd.com/read/28329364/the-effect-of-different-mitral-annuloplasty-rings-on-valve-geometry-and-annular-stress-distribution%C3%A2
#1
Søren Nielsen Skov, Diana Mathilde Røpcke, Marcell Juan Tjørnild, Christine Ilkjær, Jonas Rasmussen, Hans Nygaard, Morten Olgaard Jensen, Sten Lyager Nielsen
OBJECTIVES: To characterize the remodelling effects and deformational forces of normosized rigid, semirigid and flexible mitral annuloplasty rings after implantation in healthy pigs. METHODS: Measurements were performed in vivo with 80-kg porcine animals. Twenty-eight animals were randomized into a no ring group, a flexible ring group (Duran AnCore Ring, Medtronic, Minneapolis, MN, USA), a rigid ring group (Carpentier-Edwards Classic annuloplasty ring, Edwards Lifesciences, Irvine, CA, USA) and a semirigid ring group (Carpentier-Edwards Physio I annuloplasty ring, Edwards Lifesciences)...
February 16, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28329271/short-and-long-term-results-after-prosthetic-mitral-valve-implantation-in-patients-with-severe-mitral-annulus-calcification%C3%A2
#2
Ronny Ben-Avi, Boris Orlov, Leonid Sternik, Alexander Kogan, Rafael Kuperstien, Amjad Shalabi, Eilon Ram, Alexander Lipey, Ehud Raanani
OBJECTIVES: To investigate short- and long-term outcomes of a conservative decalcification approach in mitral valve replacement (MVR) surgery in the presence of mitral annulus calcification (MAC). METHODS: Of the 1038 patients who underwent MVR, 133 (13%) had significant MAC with at least 30% of the annular circumference heavily calcified. In most patients, the surgical approach to MAC included conservative decalcification, supra-annular prosthesis implantation and insertion of a pericardial patch between the MV annulus and the prosthesis...
March 1, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28318955/calcified-amorphous-tumor-causing-shower-embolism-to-the-brain-a-case-report-with-serial-echocardiographic-and-neuroradiologic-images-and-a-review-of-the-literature
#3
Takaomi Singu, Yuichiro Inatomi, Toshiro Yonehara, Yukio Ando
An 89-year-old woman with chronic atrial fibrillation, hypertension, chronic heart failure, and dementia was admitted to our hospital due to multiple small cerebral and cerebellar infarctions. Transthoracic echocardiogram revealed a floating calcified mass lesion arising from the endocardium of the posterior portion of the mitral annulus with mitral annular calcification. Furthermore, the mass had a heterogeneity of the echogenicity. The mass was diagnosed as a calcified amorphous tumor based on specific echocardiographic features...
March 15, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28293311/aortic-annulus-enlargement-early-and-long-terms-results
#4
Selman Dumani, Ermal Likaj, Laureta Dibra, Vera Beca, Saimir Kuci, Ali Refatllari
AIM: Patient-prosthesis mismatch (PPM) is a common occurrence in aortic valve surgery. Even the discussions about the impact of this phenomenon on the results of aortic valve surgery, the management of this problem remain one of the main topics in this kind of surgery. One of the ways of a solution is aortic annulus enlargement. The main topic of this study is to evaluate the early and longterm results of this technique in our country. METHODS: During the period January 2010 -January 2015, 641 patients performed aortic valve surgery...
March 15, 2017: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28290789/-the-evaluation-of-left-ventricular-diastolic-function-by-echocardiography-in-patients-with-preserved-ejection-fraction
#5
M N Alekhin, A M Grishin, O A Petrova
OBJECTIVE: to compare non-invasive evaluation of left ventricular (LV) diastolic function (DF) by echocardiography using algorithms of the 2009 and 2016 American Society of Echocardiography (ASE)/European Association of Echocardiography (EAE, now European Association of Cardiovascular Imaging [EACVI]) Recommendations. MATERIAL AND METHODS: The study included 100 patients with sinus rhythm and preserved left ventricular (LV) ejection fraction (EF). In all patients LV DF was assessed using both algorithms...
February 2017: Kardiologiia
https://www.readbyqxmd.com/read/28290167/simple-interrupted-suturing-for-redo-mitral-valve-replacement
#6
Hiroshi Furukawa, Taishi Tamura, Takeshi Honda, Hiroki Takiuchi, Masahiko Kuinose, Kazuo Tanemoto
BACKGROUND: An evaluation was made of the early clinical outcomes and efficacies of simple interrupted suturing (SIS) for redo mitral valve replacement (MVR). METHODS: Among 336 mitral valve surgery patients at the authors' institution between April 2000 and May 2014, a total of 21 redo MVR using SIS (12 women, nine men; mean age 67±11 years; range 32-80 years) participated in the study. Surgical indications for redo MVR were paravalvular leakage (PVL) in 10 patients, prosthetic valve endocarditis in five, mechanical valve thrombosis in three, and structural valve deterioration (SVD) of the bioprosthesis in three...
November 2016: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28289022/atrial-functional-mitral-regurgitation-from-mitral-annulus-dilatation-to-insufficient-leaflet-remodeling
#7
EDITORIAL
Victoria Delgado, Jeroen J Bax
No abstract text is available yet for this article.
March 2017: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28289019/insufficient-leaflet-remodeling-in-patients-with-atrial-fibrillation-association-with-the-severity-of-mitral-regurgitation
#8
Nobuyuki Kagiyama, Akihiro Hayashida, Misako Toki, Shota Fukuda, Minako Ohara, Atsushi Hirohata, Keizo Yamamoto, Mitsuaki Isobe, Kiyoshi Yoshida
BACKGROUND: The relationship between annular dilatation caused by atrial fibrillation (AF) and mitral regurgitation (MR) remains controversial. We hypothesized that the small ratio of total leaflet area/annulus area (TLA/AA), reflecting insufficient leaflet remodeling to annular dilatation, is a main component of MR in patients with AF. METHODS AND RESULTS: Three-dimensional transesophageal echocardiographic data of the mitral valve were analyzed in 28 AF patients with moderate or severe MR (MR group), age- and sex-matched 56 AF patients with mild or less MR (non-MR group), and 16 control subjects...
March 2017: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28279678/mitral-valve-morphology-assessed-by-three-dimensional-transthoracic-echocardiography-in-healthy-dogs-and-dogs-with-myxomatous-mitral-valve-disease
#9
G Menciotti, M Borgarelli, M Aherne, S Wesselowski, J Häggström, I Ljungvall, S M Lahmers, J A Abbott
OBJECTIVE: To assess differences in morphology of the mitral valve (MV) between healthy dogs and dogs affected by myxomatous mitral valve disease (MMVD) using real-time transthoracic three-dimensional echocardiography (RT3DE). ANIMALS: Thirty-four were normal dogs and 79 dogs were affected by MMVD. METHODS: Real-time transthoracic three-dimensional echocardiography mitral datasets were digitally recorded and analyzed using dedicated software...
March 6, 2017: Journal of Veterinary Cardiology: the Official Journal of the European Society of Veterinary Cardiology
https://www.readbyqxmd.com/read/28274519/regional-heterogeneity-in-the-mitral-valve%C3%A2-apparatus-in-patients-with-ischemic%C3%A2-mitral-regurgitation
#10
Feroze Mahmood, Ziyad O Knio, Lu Yeh, Rabia Amir, Robina Matyal, Azad Mashari, Robert C Gorman, Joseph H Gorman, Kamal R Khabbaz
BACKGROUND: Apical displacement of the coaptation point of the mitral valve (MV) in response to ischemic mitral regurgitation (IMR) represents remodeling of the MV apparatus. Whereas it implies chronicity, it lacks specificity in discriminating normal from a significantly remodeled MV apparatus. Regional aspects of MV remodeling have shown superior value over global remodeling in predicting recurrence after MV repair for IMR. Quite possibly, presence of specific regional changes in MV geometry that are unique to chronic IMR patients could also be used to diagnose the presence and track progression of remodeling...
March 5, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28271292/prevalence-of-right-atrial-non-pulmonary-vein-triggers-in-atrial-fibrillation-patients-treated-with-thyroid-hormone-replacement-therapy
#11
Ki-Hun Kim, Sanghamitra Mohanty, Prasant Mohanty, Chintan Trivedi, Eli Hamilton Morris, Pasquale Santangeli, Rong Bai, Amin Al-Ahmad, John David Burkhardt, Joseph G Gallinghouse, Rodney Horton, Javier E Sanchez, Shane Bailey, Patrick M Hranitzky, Jason Zagrodzky, Soo G Kim, Luigi Di Biase, Andrea Natale
BACKGROUND: Thyroid hormone (TH) is known to enhance arrhythmogenicity, and high-normal thyroid function is related with an increased recurrence of atrial fibrillation (AF) after catheter ablation. However, the impact of thyroid hormone replacement (THR) on AF ablation is not well known. METHODS: This study evaluated 1163 consecutive paroxysmal AF patients [160 (14%) on THR and 1003 (86%) without THR] undergoing their first catheter ablation. A total of 146 patients on THR and 146 controls were generated by propensity matching, based on calculated risk factor scores, using a logistic model (age, sex, body mass index, and left atrium size)...
March 7, 2017: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/28268514/mitral-valve-annulus-localization-in-3d-echocardiography
#12
Abhishek Tiwari, Kedar A Patwardhan
The Mitral Valve is a structure on the left side of the human heart that regulates the flow of oxygenated blood into the Left Ventricle and also helps maintain the pressure within the Left Ventricle when the blood gets pumped to the rest of the body from the Left Ventricle. Pathology of the Mitral Valve often manifests through structural changes in the anatomy. Assessment of Mitral Valve pathology as well as determination of specific interventions require quantification of various structures of the Mitral Valve and one of these structures of interest is the Mitral Valve annulus...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28252429/the-heart-left-ventricle-diastolic-function-during-exercises-of-different-power-in-athletes
#13
О Nekhanevych, V Zhylyuk, V Logvinenko, Y Kramareva
The aim of the research was to investigate diastolic left ventricle function in athletes performing exercises requiring varying power using echocardiography. We surveyed 68 athletes aged from 12 to 27 years who were involved in swimming and volleyball. Echocardiography was used to assess cardiohaemodynamic changes in athletes using a bicycle ergometer to exercise at varying intensities. Exercising at submaximal and average power produces a proportional increase in indices of diastolic function of the heart: maximum speed of early diastolic mitral inflow streams (E) to 81,9±20,0 сm/s and maximum speed of early diastolic and mitral annulus velocity (е') to 16,6±5,7 сm/s...
January 2017: Georgian Medical News
https://www.readbyqxmd.com/read/28247219/concomitant-septal-myectomy-during-minimally-invasive-aortic-valve-replacement-through-a-right-mini-thoracotomy-for-the-treatment-of-aortic-stenosis-with-systolic-anterior-motion-of-the-mitral-valve
#14
Toshinori Totsugawa, Kota Suzuki, Arudo Hiraoka, Kentaro Tamura, Hidenori Yoshitaka, Taichi Sakaguchi
This paper reports concomitant septal myectomy during minimally invasive aortic valve replacement through a right mini-thoracotomy. A 76-year-old woman was diagnosed as having aortic stenosis with systolic anterior motion of the mitral valve. The bulging septum was exposed by pulling up a traction suture placed at the annulus of the right coronary cusp; the anomalous chordae and muscle bundles attached to the septum were also resected. By setting an adequate intercostal thoracotomy and placing a traction suture, concomitant myectomy was safely performed even through a right mini-thoracotomy...
March 1, 2017: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28229822/myocardial-performance-index-in-active-and-inactive-paediatric-systemic-lupus-erythematosus
#15
Anant Khositseth, Wasana Prangwatanagul, Kanchana Tangnararatchakit, Soamarat Vilaiyuk, Nantawan Su-Angka
OBJECTIVES: To evaluate cardiac structure and function in paediatric SLE patients without clinical evidence of cardiovascular disease in active and inactive diseases. METHODS: Patients aged ≤20 years who fulfilled the diagnostic criteria of active SLE underwent transthoracic echocardiography to evaluate cardiac structure and function, and were then followed up echocardiographically every 3-4 months until SLE disease was inactive. Patients with heart failure, myocarditis, pericarditis, endocarditis, coronary artery disease, or abnormal structural heart disease were excluded...
February 3, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28226688/mitral-valve-annulus-localization-in-3d-echocardiography
#16
Abhishek Tiwari, Kedar A Patwardhan, Abhishek Tiwari, Kedar A Patwardhan, Kedar A Patwardhan, Abhishek Tiwari
The Mitral Valve is a structure on the left side of the human heart that regulates the flow of oxygenated blood into the Left Ventricle and also helps maintain the pressure within the Left Ventricle when the blood gets pumped to the rest of the body from the Left Ventricle. Pathology of the Mitral Valve often manifests through structural changes in the anatomy. Assessment of Mitral Valve pathology as well as determination of specific interventions require quantification of various structures of the Mitral Valve and one of these structures of interest is the Mitral Valve annulus...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28215921/role-of-myocardial-collagen-in-severe-aortic-stenosis-with-preserved-ejection-fraction-and-symptoms-of-heart-failure
#17
Kattalin Echegaray, Ion Andreu, Ane Lazkano, Iñaki Villanueva, Alberto Sáenz, María Reyes Elizalde, Tomás Echeverría, Begoña López, Asier Garro, Arantxa González, Elena Zubillaga, Itziar Solla, Iñaki Sanz, Jesús González, Alberto Elósegui-Artola, Pere Roca-Cusachs, Javier Díez, Susana Ravassa, Ramón Querejeta
INTRODUCTION AND OBJECTIVES: We investigated the anatomical localization, biomechanical properties, and molecular phenotype of myocardial collagen tissue in 40 patients with severe aortic stenosis with preserved ejection fraction and symptoms of heart failure. METHODS: Two transmural biopsies were taken from the left ventricular free wall. Mysial and nonmysial regions of the collagen network were analyzed. Myocardial collagen volume fraction (CVF) was measured by picrosirius red staining...
February 16, 2017: Revista Española de Cardiología
https://www.readbyqxmd.com/read/28212053/transthoracic-echocardiography-pitfalls-and-limitations-as-delineated-at-cardiac-ct-and-mr-imaging
#18
Sachin B Malik, Natalie Chen, Rex A Parker, Joe Y Hsu
Transthoracic echocardiography ( TTE transthoracic echocardiography ) is a critical tool in the field of clinical cardiology. It often serves as one of the first-line imaging modalities in the evaluation of cardiac disease owing to its low cost, portability, widespread availability, lack of ionizing radiation, and ability to evaluate both anatomy and function of the heart. Consequently, a large majority of patients undergoing a cardiac computed tomography (CT) or magnetic resonance (MR) imaging examination will have a TTE transthoracic echocardiography available for review...
March 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28207320/cardiac-findings-in-quarter-horses-with-heritable-equine-regional-dermal-asthenia
#19
Erin L Brinkman, Benjamin C Weed, Sourav S Patnaik, Bryn L Brazile, Ryan M Centini, Robert W Wills, Bari Olivier, Dodd G Sledge, Jim Cooley, Jun Liao, Ann M Rashmir-Raven
OBJECTIVE To compare biomechanical and histologic features of heart valves and echocardiographic findings between Quarter Horses with and without heritable equine regional dermal asthenia (HERDA). DESIGN Prospective case-control study. ANIMALS 41 Quarter Horses. PROCEDURES Ultimate tensile strength (UTS) of aortic and mitral valve leaflets was assessed by biomechanical testing in 5 horses with HERDA and 5 horses without HERDA (controls). Histologic evaluation of aortic and mitral valves was performed for 6 HERDA-affected and 3 control horses...
March 1, 2017: Journal of the American Veterinary Medical Association
https://www.readbyqxmd.com/read/28203542/robotic-trans-atrial-and-trans-mitral-ventricular-septal-resection
#20
REVIEW
W Randolph Chitwood
Localized ventricular septal hypertrophy, also known as idiopathic hypertrophic subaortic stenosis or idiopathic hypertrophic subaortic septal obstruction (IHSS), can create severe ventricular outflow obstruction. This often results in a high sub-aortic pressure gradient with potentially lethal symptoms. In 1960, Braunwald described the hemodynamic characteristics of IHSS, and thereafter, Morrow developed a trans-aortic approach to resect a large part of the ventricular septum, enlarging the outflow tract. The Morrow operation has remained the gold standard for surgically treating this pathology...
January 2017: Annals of Cardiothoracic Surgery
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