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https://www.readbyqxmd.com/read/28918516/valve-sparing-aortic-root-surgery-con-remodeling
#1
Takashi Kunihara
The two major valve-sparing root replacement procedures, aortic valve reimplantation (reimplantation) and aortic root remodeling (remodeling), have advantages and disadvantages, which are reviewed herein. The main advantage of reimplantation is the resulting annular support, and the disadvantages are the unfavorable hemodynamics and relatively long procedure time. The main advantages of remodeling are the physiological hemodynamics and decreased procedure time, and the disadvantage is the lack of annular support...
September 16, 2017: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28917492/aortic-root-fibroelastoma-causing-cardiac-ischemia
#2
Swati Kumar, Roman Zeltser, Amgad N Makaryus
No abstract text is available yet for this article.
September 11, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28916397/computational-assessment-of-model-based-wave-separation-using-a-database-of-virtual-subjects
#3
Bernhard Hametner, Magdalena Schneider, Stephanie Parragh, Siegfried Wassertheurer
The quantification of arterial wave reflection is an important area of interest in arterial pulse wave analysis. It can be achieved by wave separation analysis (WSA) if both the aortic pressure waveform and the aortic flow waveform are known. For better applicability, several mathematical models have been established to estimate aortic flow solely based on pressure waveforms. The aim of this study is to investigate and verify the model-based wave separation of the ARCSolver method on virtual pulse wave measurements...
September 12, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28905233/gated-thoracic-magnetic-resonance-angiography-at-3t-noncontrast-versus-blood-pool-contrast
#4
Chengcheng Zhu, Henrik Haraldsson, Kimberly Kallianos, Liang Ge, Elaine Tseng, Travis Henry, David Saloner, Michael D Hope
Both noncontrast and contrast-enhanced approaches to gated thoracic magnetic resonance angiography (MRA) for aortic root evaluation have been reported at 3T. We compare qualitative and quantitative image quality measures for the two approaches, and assess the reproducibility of standard aortic measurements. Respiratory and cardiac gated MRA of the chest was performed at 3T in 45 patients: 23 after administration of iron-based blood pool contrast, and 22 without contrast. Image quality was assessed with a 5-point Likert scale, vessel lumen-to-muscle contrast ratios, and vessel wall sharpness...
September 13, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28903936/aortic-valve-stenosis-alters-expression-of-regional-aortic-wall-shear-stress-new-insights-from-a-4-dimensional-flow-magnetic-resonance-imaging-study-of-571-subjects
#5
Pim van Ooij, Michael Markl, Jeremy D Collins, James C Carr, Cynthia Rigsby, Robert O Bonow, S Chris Malaisrie, Patrick M McCarthy, Paul W M Fedak, Alex J Barker
BACKGROUND: Wall shear stress (WSS) is a stimulus for vessel wall remodeling. Differences in ascending aorta (AAo) hemodynamics have been reported between bicuspid aortic valve (BAV) and tricuspid aortic valve patients with aortic dilatation, but the confounding impact of aortic valve stenosis (AS) is unknown. METHODS AND RESULTS: Five hundred seventy-one subjects underwent 4-dimensional flow magnetic resonance imaging in the thoracic aorta (210 right-left BAV cusp fusions, 60 right-noncoronary BAV cusp fusions, 245 tricuspid aortic valve patients with aortic dilatation, and 56 healthy controls)...
September 13, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28903402/impact-of-chronic-methamphetamine-treatment-on-the-atherosclerosis-formation-in-apoe-mice-fed-a-high-cholesterol-diet
#6
Pengfei Zhu, Lun Li, Bo Gao, Mingjing Zhang, Yuting Wang, Ye Gu, Liqun Hu
BACKGROUND: We previously reported that methamphetamine could promote atherosclerosis (AS) in ApoE-/- mice fed normal chow. We herein observed the impact of methamphetamine on AS in ApoE-/- mice fed a high cholesterol diet and explored the potential mechanisms. RESULTS AND MATERIALS AND METHODS: Male ApoE-/- mice fed a high cholesterol diet were treated with saline (NS, n = 5) or methamphetamine [8 mg/kg/day (M8, n = 6) through intraperitoneal injection] for 24 weeks...
August 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28902643/prevalence-and-characteristics-of-coronary-artery-anomalies-in-children-with-congenital-heart-disease-diagnosed-with-coronary-angiography
#7
Münevver Tuğba Temel, Mehmet Enes Coşkun, Osman Başpınar, Abdullah Tuncay Demiryürek
OBJECTIVE: Aim of the present study was to determine the prevalence of coronary artery anomalies in children with congenital heart disease. METHODS: Data of 1138 consecutive patients who were referred for cardiac catheterization and angiography for assessment of coronary anomaly between January 2005 and December 2009 were retrospectively analyzed. Total of 515 patients whose coronary arteries could be examined through left ventricle and aortic root injection were included in the study...
September 2017: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/28886071/dynamics-of-the-aortic-annulus-in-4d-ct-angiography-for-transcatheter-aortic-valve-implantation-patients
#8
Mustafa A Elattar, Leon W Vink, Martijn S van Mourik, Jan Baan, Ed T vanBavel, R Nils Planken, Henk A Marquering
BACKGROUND: Transcatheter aortic valve implantation (TAVI) is a well-established treatment for patients with severe aortic valve stenosis. This procedure requires pre-operative planning by assessment of aortic dimensions on CT Angiography (CTA). It is well-known that the aortic root dimensions vary over the heart cycle. However, sizing is commonly performed at either mid-systole or end-diastole only, which has resulted in an inadequate understanding of its full dynamic behavior. STUDY GOAL: We studied the variation in annulus measurements during the cardiac cycle and determined if this variation is dependent on the amount of calcification at the annulus...
2017: PloS One
https://www.readbyqxmd.com/read/28883308/successful-management-of-iatrogenic-retrograde-dissection-into-the-aortic-root
#9
Kadir Uğur Mert, Gurbet Özge Mert, Rafet Dizman
No abstract text is available yet for this article.
September 2017: Anatolian Journal of Cardiology
https://www.readbyqxmd.com/read/28878951/high-pitch-versus-conventional-cardiovascular-ct-in-patients-being-assessed-for-transcatheter-aortic-valve-implantation-a-real-world-appraisal
#10
Tevfik F Ismail, Emma Cheasty, Laurence King, Sahar Naaseri, Olga Lazoura, Natalie Gartland, Simon Padley, Michael B Rubens, Isabel Castellano, Edward D Nicol
OBJECTIVE: High-pitch protocols are increasingly used in cardiovascular CT assessment for transcatheter aortic valve implantation (TAVI), but the impact on diagnostic image quality is not known. METHODS: We reviewed 95 consecutive TAVI studies: 44 (46%) high-pitch and 51 (54%) standard-pitch. Single high-pitch scans were performed regardless of heart rate. For standard-pitch acquisitions, a separate CT-aortogram and CT-coronary angiogram were performed with prospective gating, unless heart rate was ≥70 beats/min, when retrospective gating was used...
2017: Open Heart
https://www.readbyqxmd.com/read/28878878/successful-treatment-of-aortic-root-dissection-complicated-with-extensive-myocardial-infarction-using-the-total-artificial-heart
#11
Tamer Attia, Michael Robich, A Michael Lincoff, Mehdi H Shishehbor, Lars Svensson, Nicholas G Smedira
Acute Type A aortic dissection is a surgical emergency. Urgent repair is indicated to avoid complications such as acute aortic insufficiency, coronary ischemia and aortic rupture with cardiac tamponade. This report details the management of a patient with acute Type A aortic dissection complicated by an extensive anterolateral myocardial infarction and cardiogenic shock who was successfully bridged to transplantation with a total artificial heart.
August 2017: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/28878101/percutaneous-closure-of-two-acquired-aorto-right-ventricular-fistulae-following-right-ventricular-outflow-tract-surgery
#12
Sofia A Horvath, Saqib Ali Gowani, Christian Koelbl, John F Rhodes, Esteban Escolar, Orlando Santana
The present case illustrates the successful transcatheter closure of an unusual double aortic root-to-right ventricular outflow tract fistula utilizing two Amplatzer duct occluders II.
September 2017: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/28875285/current-status-of-cardiovascular-surgery-in-japan-2013-and-2014-a-report-based-on-the-japan-cardiovascular-surgery-database-5-thoracic-aortic-surgery
#13
REVIEW
Hideyuki Shimizu, Norimichi Hirahara, Noboru Motomura, Hiroaki Miyata, Shinichi Takamoto
BACKGROUND: Although open aortic repair (OAR) is still considered to be a standard treatment for thoracic aortic diseases, the indications for thoracic endovascular treatment (TEVAR)/hybrid aortic repair (HAR) have expanded in recent years. The purpose of this study was to review the current status of treatment of thoracic aortic diseases in Japan. METHODS: Data for 2013 and 2014 concerning surgery for diseases of the thoracic/thoracoabdominal aorta were extracted from the Japan Cardiovascular Surgery Database (JCVSD)...
September 5, 2017: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28874282/smad4-gene-mutation-increases-the-risk-of-aortic-dilation-in-patients-with-hereditary-haemorrhagic-telangiectasia
#14
V M M Vorselaars, A Diederik, V Prabhudesai, S Velthuis, J-A Vos, R J Snijder, C J J Westermann, B J Mulder, J K Ploos van Amstel, J J Mager, M E Faughnan, M C Post
BACKGROUND: Mutations in the genes ENG, ACVRL1 and SMAD4 that are part of the transforming growth factor-beta signalling pathway cause hereditary haemorrhagic telangiectasia (HHT). Mutations in non-HHT genes within this same pathway have been found to associate with aortic dilation. Therefore, we investigated the presence of aortic dilation in a large cohort of HHT patients as compared to non-HHT controls. METHODS: Chest computed tomography of consecutive HHT patients (ENG, ACVRL1 and SMAD4 mutation carriers) and non-HHT controls were reviewed...
October 15, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28868309/aortic-root-reconstruction-with-a-new-dacron-graft-featuring-prefabricated-coronary-side-branches-lessons-learned-from-the-cabrol-procedure
#15
Domenico Calcaterra, Mohammad-Ali Jazayeri, Joseph W Turek, Kalpaj R Parekh, Mohammad Bashir, Karam Karam, Robert S Farivar
BACKGROUND: Coronary button reimplantation can represent a technical challenge of aortic root reconstruction that can be associated with significant morbidity and mortality. With the goal of simplifying coronary reimplantation and reducing the incidence of related complications, we designed a new Dacron graft with prefabricated coronary branches to minimize coronary artery mobilization and prevent the potential mechanical complications of reattachment to the body of the graft. METHODS: Between June 2010 and May 2012, we implanted the graft in eight patients (six males, two females) ranging in age from 42-68 years (mean, 54 years)...
February 2017: Aorta (Stamford, Conn.)
https://www.readbyqxmd.com/read/28866363/effects-of-apolipoprotein-m-in-uremic-atherosclerosis
#16
Markus Høybye Bosteen, Eva Martha Madsen Svarrer, Line Stattau Bisgaard, Torben Martinussen, Marie Madsen, Lars Bo Nielsen, Christina Christoffersen, Tanja Xenia Pedersen
BACKGROUND AND AIMS: Chronic kidney disease is characterized by uremia and causes premature death, partly due to accelerated atherosclerosis. Apolipoprotein (apo) M is a plasma carrier protein for the lipid sphingosine-1-phosphate (S1P). The Apom-S1P complex associates with HDL, and may contribute to its anti-atherosclerotic effects. The role of Apom/S1P in atherosclerosis is presently controversial and has not been explored in a uremic setting. We aimed to explore whether plasma concentrations of Apom/S1P are altered by uremia and whether Apom overexpression or deficiency affects classical and uremic atherosclerosis...
August 18, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28864719/anatomical-and-clinical-predictors-of-valve-dysfunction-and-aortic-dilation-in-bicuspid-aortic-valve-disease
#17
Arturo Evangelista, Pastora Gallego, Francisco Calvo-Iglesias, Javier Bermejo, Juan Robledo-Carmona, Violeta Sánchez, Daniel Saura, Roman Arnold, Amelia Carro, Giuliana Maldonado, Augusto Sao-Avilés, Gisela Teixidó, Laura Galian, José Rodríguez-Palomares, David García-Dorado
OBJECTIVE: Bicuspid aortic valve (BAV) is associated with early valvular dysfunction and proximal aorta dilation with high heterogeneity. This study aimed to assess the determinants of these complications. METHODS: Eight hundred and fifty-two consecutive adults diagnosed of BAV referred from cardiac outpatient clinics to eight echocardiographic laboratories of tertiary hospitals were prospectively recruited. Exclusion criteria were aortic coarctation, other congenital disorders or intervention...
September 1, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28857274/aortic-root-replacement-with-left-main-trunk-reconstruction-using-autologous-pericardial-cuff-technique-for-ostial-stenosis-in-takayasu-s-arteritis
#18
Yutaka Iba, Akira Yamada, Naritomo Nishioka, Kosuke Ujihira, Katsuhiko Nakanishi
No abstract text is available yet for this article.
August 30, 2017: Journal of Cardiac Surgery
https://www.readbyqxmd.com/read/28852969/recovery-from-very-long-aortic-cross-clamping-in-redo-complex-aortic-surgery
#19
Shoichi Suehiro, Koji Shimizu, Megumi Ito, Hayato Nakata, Kazuhiro Akeho, Teiji Oda
A 68-year-old man had undergone ascending aortic replacement for acute type A aortic dissection. Three months later, he had a new aortic dissection with an ulcer-like projection located in the aortic arch with suspected graft infection. An emergent redo total aortic arch and root replacement was performed because of the coexistence of a fragile aortic root wall. The extensive redo procedure necessitated a very long aortic cross-clamping time (516 min). After 25 min of assisted circulation, he was easily weaned from the cardiopulmonary bypass...
August 29, 2017: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28845021/diagnostic-accuracy-of-electrocardiographic-p-wave-related-parameters-in-the-assessment-of-left-atrial-size-in-dogs-with-degenerative-mitral-valve-disease
#20
Ángel Soto-Bustos, Alicia Caro-Vadillo, Elena Martínez-DE-Merlo, Elisa González Alonso-Alegre
The purpose of this research was to compare the accuracy of newly described P wave-related parameters (P wave area, Macrux index and mean electrical axis) with classical P wave-related parameters (voltage and duration of P wave) for the assessment of left atrial (LA) size in dogs with degenerative mitral valve disease. One hundred forty-six dogs (37 healthy control dogs and 109 dogs with degenerative mitral valve disease) were prospectively studied. Two-dimensional echocardiography examinations and a 6-lead ECG were performed prospectively in all dogs...
August 28, 2017: Journal of Veterinary Medical Science
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