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https://www.readbyqxmd.com/read/27923487/reimplantation-of-the-aortic-valve-at-20%C3%A2-years
#1
Tirone E David, Carolyn M David, Christopher M Feindel, Cedric Manlhiot
OBJECTIVE: To provide additional information on clinical and echocardiographic outcomes after reimplantation of the aortic valve (RAV) in patients with aortic root aneurysm. METHODS: All 333 patients who underwent RAV at our hospital between 1989 and 2012 were followed prospectively with periodical clinical assessment and echocardiography. The mean duration of clinical follow-up was 10.3 ± 6.8 years, and follow-up was completed within 2 years before this report...
November 16, 2016: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/27923486/valve-sparing-aortic-root-replacement-surgeon-and-patient-factors-contribute-to-long-term-durability
#2
EDITORIAL
John S Ikonomidis
No abstract text is available yet for this article.
November 18, 2016: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/27921078/data-on-genetic-analysis-of-atherosclerosis-identifies-a-major-susceptibility-locus-in-the-major-histocompatibility-complex-of-mice
#3
Andrew T Grainger, Michael B Jones, Jing Li, Mei-Hua Chen, Ani Manichaikul, Weibin Shi
The data presented here are related to the research article, entitled Genetic analysis of atherosclerosis identifies a major susceptibility locus in the major histocompatibility complex of mice, published in Atherosclerosis 2016;254:124 (A.T. Grainger, M.B. Jones, J. Li, M.H. Chen, A. Manichaikul, W. Shi, 2016) [1]. The supporting materials include original genotypic and phenotypic data obtained from 206 female F2 mice derived from an intercross between BALB and SMJ inbred mice. The F2 mice were fed 12 weeks of Western diet, starting at 6 weeks of age...
December 2016: Data in Brief
https://www.readbyqxmd.com/read/27920128/forward-and-backward-pressure-waveform-morphology-in-hypertension
#4
Ye Li, Haotian Gu, Henry Fok, Jordi Alastruey, Philip Chowienczyk
We tested the hypothesis that increased pulse wave reflection and altered backward waveform morphology contribute to increased pulse pressure in subjects with higher pulse pressure compared with lower pulse pressure and to actions of vasoactive drugs to increase pulse pressure. We examined the relationship of backward to forward wave morphology in 158 subjects who were evaluated for hypertension (including some normotensive subjects) divided into 3 groups by central pulse pressure: group 1, 33±6.5 mm Hg; group 2, 45±4...
December 5, 2016: Hypertension
https://www.readbyqxmd.com/read/27918847/left-ventricular-compressions-improve-hemodynamics-in-a-swine-model-of-out-of-hospital-cardiac-arrest
#5
Kenton L Anderson, Maria G Castaneda, Susan M Boudreau, Danny J Sharon, Vikhyat S Bebarta
INTRODUCTION: We hypothesized that chest compressions located directly over the left ventricle (LV) would improve hemodynamics, including coronary perfusion pressure (CPP), and return of spontaneous circulation (ROSC) in a swine model of cardiac arrest. METHODS: Transthoracic echocardiography (echo) was used to mark the location of the aortic root and the center of the left ventricle on animals (n = 26) which were randomized to receive chest compressions in one of the two locations...
December 5, 2016: Prehospital Emergency Care
https://www.readbyqxmd.com/read/27916847/aortic-root-dilatation-in-mucopolysaccharidosis-i-vii
#6
Meena Bolourchi, Pierangelo Renella, Raymond Y Wang
The prevalence of aortic root dilatation (ARD) in mucopolysaccharidosis (MPS) is not well documented. We investigated aortic root measurements in 34 MPS patients at the Children's Hospital of Orange County (CHOC). The diagnosis, treatment status, age, gender, height, weight and aortic root parameters (aortic valve annulus (AVA), sinuses of Valsalva (SoV), and sinotubular junction (STJ)) were extracted by retrospective chart review and echocardiographic measurements. Descriptive statistics, ANOVA, and paired post-hoc t-tests were used to summarize the aortic dimensions...
November 29, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27915239/emergency-cardiac-double-valve-surgery-in-active-infective-endocarditis-due-to-acinetobacter-baumannii-with-aortic-root-abscess-in-a-patient-with-dialysis-dependent-end-stage-renal-failure-a-rare-case-report
#7
Moosa Kunhi, Sachin Sanagar, N Jagadeesh, Bhima Shankar, Abi Abraham
We report an end-stage renal disease (ESRD) patient on regular haemodialysis awaiting renal transplant having native aortic valve endocarditis due to Acinetobacter baumannii complicated with aortic root abscess and severe mitral valve regurgitation with NYHA class IV symptoms. He underwent emergency aortic root abscess debridement, reconstruction with autologous pericardial patch and bioprosthetic aortic valve replacement along with mitral valve repair. This emergency intervention in active infective endocarditis due to A...
December 2, 2016: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/27915184/anti-atherosclerotic-effects-of-pravastatin-in-brachiocephalic-artery-in-comparison-with-en-face-aorta-and-aortic-roots-in-apoe-ldlr-mice
#8
Renata B Kostogrys, Magdalena Franczyk-Zarow, Marlena Gasior-Glogowska, Edyta Kus, Agnieszka Jasztal, Tomasz P Wrobel, Malgorzata Baranska, Izabela Czyzynska-Cichon, Anna Drahun, Angelika Manterys, Stefan Chlopicki
BACKGROUND: Cholesterol-dependent and independent mechanisms were proposed to explain anti-atherosclerotic action of statins in humans. However, their effects in murine models of atherosclerosis have not been consistently demonstrated. Here, we studied the effects of pravastatin on atherosclerosis in ApoE/LDLR(-/-) mice fed a control and atherogenic diet. METHODS: ApoE/LDLR(-/-) mice were fed a control (CHOW) or an atherogenic (Low Carbohydrate High Protein, LCHP) diet...
September 17, 2016: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/27911025/effect-of-balloon-expandable-transcatheter-aortic-valve-replacement-positioning-a-patient-specific-numerical-model
#9
Matteo Bianchi, Gil Marom, Ram P Ghosh, Harold A Fernandez, James R Taylor, Marvin J Slepian, Danny Bluestein
Transcatheter aortic valve replacement (TAVR) has emerged as a life-saving and effective alternative to surgical valve replacement in high-risk, elderly patients with severe calcific aortic stenosis. Despite its early promise, certain limitations and adverse events, such as suboptimal placement and valve migration, have been reported. In the present study, it was aimed to evaluate the effect of various TAVR deployment locations on the procedural outcome by assessing the risk for valve migration. The deployment of a balloon-expandable Edwards SAPIEN valve was simulated via finite element analysis in a patient-specific calcified aortic root, which was reconstructed from CT scans of a retrospective case of valve migration...
December 2016: Artificial Organs
https://www.readbyqxmd.com/read/27909275/-pseudoaneurysm-formation-after-aortic-root-replacement-using-freestyle-porcine-bioprosthesis
#10
Tetsuro Uchida, Azumi Hamasaki, Atsushi Yamashita, Ken Nakamura, Jun Hayashi, Satoko Funata, Seigo Gomi, Mitsuaki Sadahiro
We report a case of pseudoaneurysm formation after implantation of Medtronic Freestyle stentless bioprosthesis with a full root technique. A 65-year-old man previously underwent aortic root replacement with a Freestyle bioprosthesis. Ten years after the initial operation, pseudoaneurysm of the aortic root with a diameter of 6 cm was observed by computed tomography. At the reoperation, there was no sign of infective endocarditis, and the pseudoaneurysm was found to originate from the ruptured left and noncoronary sinuses...
December 2016: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/27908893/tracking-monocyte-recruitment-and-macrophage-accumulation-in-atherosclerotic-plaque-progression-using-a-novel-hcd68gfp-apoe-reporter-mouse
#11
Eileen McNeill, Asif J Iqbal, Daniel Jones, Jyoti Patel, Patricia Coutinho, Lewis Taylor, David R Greaves, Keith M Channon
OBJECTIVE: To create a model of atherosclerosis using green fluorescent protein (GFP)-targeted monocytes/macrophages, allowing analysis of both endogenous GFP(+) and adoptively transferred GFP(+) myeloid cells in arterial inflammation. APPROACH AND RESULTS: hCD68GFP reporter mice were crossed with ApoE(-/-) mice. Expression of GFP was localized to macrophages in atherosclerotic plaques and in angiotensin II-induced aortic aneurysms and correlated with galectin 3 and mCD68 expression. Flow cytometry confirmed GFP(+) expression in CD11b(+)/CD64(+), CD11c(+)/MHC-II(HI), and CD11b(+)/F4/80(+) myeloid cells...
December 1, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/27899177/a-personalized-model-based-central-aortic-pressure-estimation-method
#12
Sheng Jiang, Zhi-Qiang Zhang, Fang Wang, Jian-Kang Wu
Central Aortic Pressure (CAP) can be used to predict cardiovascular structural damage and cardiovascular events, and the development of simple, well-validated and non-invasive methods for CAP waveforms estimation is critical to facilitate the routine clinical applications of CAP. Existing widely applied methods, such as generalized transfer function (GTF-CAP) method and N-Point Moving Average (NPMA-CAP) method, are based on clinical practices, and lack a mathematical foundation. Those methods also have inherent drawback that there is no personalisation, and missing individual aortic characteristics...
November 22, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/27894713/abdominal-aortic-aneurysm-in-marfan-syndrome
#13
Tracy Hagerty, Patrick Geraghty, Alan C Braverman
OBJECTIVE: Marfan syndrome (MFS) leads to aortic root aneurysm, while descending thoracic aortic aneurysm (TAA) occurs less commonly. Abdominal aortic aneurysm (AAA) is rarely reported in MFS. Risk factors for AAA are poorly understood and there are no guidelines for AAA screening in MFS. We sought to characterize AAA among Marfan patients in our center. METHODS: The records of 12 adults with MFS and AAA disease were reviewed. Clinical features, imaging, operative reports, and outcomes were analyzed...
November 25, 2016: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27889555/correlation-between-microvascular-dysfunction-and-b-type-natriuretic-peptide-levels-in-non-ischemic-heart-failure-patients-with-cardiac-fibrosis
#14
Kyoko Hirakawa, Megumi Yamamuro, Tomoaki Uemura, Seiji Takashio, Koichi Kaikita, Daisuke Utsunomiya, Mina Nakayama, Eiichiro Yamamoto, Yasuyuki Yamashita, Seiji Hokimoto, Kenichi Tsujita
BACKGROUNDS: The relationship between microvascular dysfunction and plasma B-type natriuretic peptide (BNP) levels remains unclear in heart failure (HF) patients with cardiac fibrosis. METHODS: This study evaluated 55 consecutive non-ischemic HF patients in an effort to determine the relationship between endothelial independent coronary microvascular dysfunction and plasma BNP levels, as well as whether each measure is correlated with myocardial fibrosis. We evaluated plasma BNP levels in patients with stable HF...
November 8, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27884484/ross-hybrid-arch-and-frozen-elephant-trunk-reconstruction-for-late-complications-of-bicuspid-aortic-valve-and-aortopathy
#15
Matthew Valdis, Gaetano DeRose, Linrui Guo, Michael W A Chu
Young patients with bicuspid aortic valve disease and aortopathy remain a clinical challenge, with many requiring multiple corrective operations throughout their lifetimes. Innovative surgical approaches are often required to address complex aortic pathologic conditions but leave patients at risk for reintervention, lifelong anticoagulation, and suboptimal hemodynamics. We describe an active 44-year-old female triathlete with recurrent bicuspid aortic stenosis, a small aortic root, a hypoplastic aortic arch and complex distal arch, and a descending aortic aneurysm, who underwent a single-stage reconstruction with a combined Ross procedure, hybrid arch, and frozen elephant trunk reconstruction...
December 2016: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/27883333/design-of-a-simple-coronary-impedance-simulator-for-the-in-vitro-study-of-the-complex-coronary-hemodynamics
#16
Marco Piola, Riccardo Vismara, Giordano Tasca, Federico Lucherini, Paola Redaelli, Monica Soncini, Claudia Romagnoni, Andrea Mangini, Carlo Antona, Gianfranco Beniamino Fiore
Several novel approaches were recently developed to treat aortic root pathologies. The alteration induced by some of these approaches to the biomechanics of the aortic root could possibly affect the coronary perfusion, compromising the procedural outcome. In this scenario, the need to replicate in vitro the coronary flow pattern in physiological and pathological conditions is becoming crucial for the functional assessment of novel devices and techniques. This article describes the design of an easy-to-use, left-and-right coronary impedance simulator, coupled with native aortic roots for in vitro pulsatile tests...
November 24, 2016: Physiological Measurement
https://www.readbyqxmd.com/read/27882488/quantification-of-motion-of-the-thoracic-aorta-after-ascending-aortic-repair-of-type-a-dissection
#17
Ga-Young Suh, Dominik Fleischmann, Ramin E Beygui, Christopher P Cheng
PURPOSE: To quantify cardiac and respiratory deformations of the thoracic aorta after ascending aortic graft repair. METHODS: Eight patients were scanned with cardiac-resolved computed tomography angiography during inspiratory/expiratory breath-holds. Aortic centerlines and lumen were extracted to compute the arclength, curvature, angulation, and cross-section shape. RESULTS: From systole to diastole, the angle of graft [Formula: see text] arch increased by 2...
November 23, 2016: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/27879313/international-registry-of-patients-carrying-tgfbr1-or-tgfbr2-mutations-results-of-the-montalcino-aortic-consortium
#18
Guillaume Jondeau, Jacques Ropers, Ellen Regalado, Alan Braverman, Arturo Evangelista, Guisela Teixido, Julie De Backer, Laura Muiño-Mosquera, Sophie Naudion, Cecile Zordan, Takayuki Morisaki, Hiroto Morisaki, Yskert Von Kodolitsch, Sophie Dupuis-Girod, Shaine A Morris, Richmond Jeremy, Sylvie Odent, Lesley C Adès, Madhura Bakshi, Katherine Holman, Scott LeMaire, Olivier Milleron, Maud Langeois, Myrtille Spentchian, Melodie Aubart, Catherine Boileau, Reed Pyeritz, Dianna M Milewicz
BACKGROUND: -The natural history of aortic diseases in patients with TGFBR1 or TGFBR2 mutations reported by different investigators has varied greatly. In particular, the current recommendations for the timing of surgical repair of the aortic root aneurysms may be overly aggressive. METHODS AND RESULTS: -The Montalcino Aortic Consortium, which includes 15 centers worldwide that specialize in heritable thoracic aortic diseases, was used to gather data on 441 patients from 228 families, with 176 cases harboring a mutation in TGBR1 and 265 in TGFBR2 Patients harboring a TGFBR1 mutation have similar survival rates (80% survival at 60 years), aortic risk (23% aortic dissection, 18% preventive aortic surgery), and prevalence of extra-aortic features (29% hypertelorism, 53% cervical arterial tortuosity, 27% wide scars) when compared to patients harboring a TGFBR2 mutation...
November 21, 2016: Circulation. Cardiovascular Genetics
https://www.readbyqxmd.com/read/27873227/the-relationship-between-aortic-root-size-and-hypertension-an-unsolved-conundrum
#19
Giuseppe Mulè, Emilio Nardi, Massimiliano Morreale, Antonella Castiglia, Giulio Geraci, Dario Altieri, Valentina Cacciatore, Margherita Schillaci, Francesco Vaccaro, Santina Cottone
Thoracic aortic aneurysms rupture and dissection are among the most devastating vascular diseases, being characterized by elevated mortality, despite improvements in diagnostic imaging and surgical techniques.An increased aortic root diameter (ARD) represents the main risk factor for thoracic aortic dissection and rupture and for aortic valve regurgitation.Even though arterial hypertension is commonly regarded as a predisposing condition for the development of thoracic aorta aneurysms, the role of blood pressure (BP) as determinant of aortic root enlargement is still controversial...
November 22, 2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27873180/pledget-armed-sutures-affect-the-haemodynamic-performance-of-biologic-aortic-valve-substitutes-a-preliminary-experimental-and-computational-study
#20
Claudio Capelli, Chiara Corsini, Dario Biscarini, Francesco Ruffini, Francesco Migliavacca, Alfred Kocher, Guenther Laufer, Andrew M Taylor, Silvia Schievano, Martin Andreas, Gaetano Burriesci, Claus Rath
Surgical aortic valve replacement is the most common procedure of choice for the treatment of severe aortic stenosis. Bioprosthetic valves are traditionally sewed-in the aortic root by means of pledget-armed sutures during open-heart surgery. Recently, novel bioprostheses which include a stent-based anchoring system have been introduced to allow rapid implantation, therefore reducing the duration and invasiveness of the intervention. Different effects on the hemodynamics were clinically reported associated with the two technologies...
November 21, 2016: Cardiovascular Engineering and Technology
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