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Aortic isthmus

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https://www.readbyqxmd.com/read/29486850/remodeling-of-the-cardiovascular-circulation-in-fetuses-of-mothers-with-diabetes-a-fetal-computational-model-analysis
#1
Aparna Kulkarni, Patricia Garcia-Cañadilla, Abdullah Khan, Jose Miguel Lorenzo, Karen Beckerman, Brenda Valenzuela-Alcaraz, Monica Cruz-Lemini, Olga Gomez, Eduard Gratacos, Fatima Crispi, Bart Bijnens
AIMS: Myocardial structural and functional abnormalities are known to occur in fetuses of mothers with diabetes mellitus (FMDM). The main aim of this investigation was to explore the cardiovascular circulatory patterns in FMDM using a validated lumped computational model of the cardiovascular system. METHODS: This was a multi-institutional study involving FMDM compared to fetuses of maternal controls (FC). Fetal echocardiographic Doppler data from left and right ventricular outflow tracts, aortic isthmus, middle cerebral and umbilical arteries were fitted into a validated fetal circulation computational model to estimate patient-specific placental and vascular properties...
March 2018: Placenta
https://www.readbyqxmd.com/read/29486816/spontaneous-regression-of-severe-aortic-coarctation-in-trisomy-18
#2
Shun Matsumura, Satoshi Masutani, Hideaki Senzaki
Spontaneous regression of severe aortic coarctation with ductus dependency has not been reported. We experienced a case of trisomy 18 with spontaneous regression of severe aortic coarctation complicated by ventricular septal defect and patent ductus arteriosus. The aortic isthmus diameter was 1.2 mm at birth. After 5 months, it increased to 4.5 mm, and the shape of the isthmus was fully normalised.
February 28, 2018: Cardiology in the Young
https://www.readbyqxmd.com/read/29325526/aortoesophageal-fistula-and-arch-pseudoaneurysm-after-removing-of-a-swallowed-chicken-bone-a-case-report-of-one-stage-hybrid-treatment
#3
Jia-Yu Shen, Hong-Wei Zhang, Kang-Jun Fan, Hu Liao, Er-Yong Zhang, Jia Hu
BACKGROUND: Aortoesophageal fistula (AEF) and arch pseudoaneurysm are rare complications induced by a foreign body, and considerable controversy remains regarding the appropriate management strategies. We herein report a successful one-stage hybrid treatment in a patient with AEF and arch pseudoaneurysm. CASE PRESENTATION: The patient, a 40-year-old man, presented to the emergency room because of intense retrosternal discomfort for 3 days and hematemesis for 3 h...
January 11, 2018: BMC Surgery
https://www.readbyqxmd.com/read/29276439/endovascular-treatment-of-distal-aortic-arch-aneurysm-associated-with-coarctation-of-aorta-in-a-jehovah-s-witness
#4
Luigi Di Tommaso, Vito A Mannacio, Ettorino Di Tommaso, Giovanni B Pinna, Immacolata Fontana, Gabriele Iannelli
Late aneurysm formation in the proximal aorta or distal aortic arch is a recognized sequela of untreated stenosis of the aortic isthmus and is associated with substantial risk of aortic rupture. We describe the case of a 44-year-old man with untreated coarctation of the aorta who presented with a prestenotic dissecting thoracic aortic aneurysm. He declined surgery because he was a Jehovah's Witness. Instead, we performed emergency endovascular aortic repair in which 2 stent-grafts were placed in the descending aorta...
December 2017: Texas Heart Institute Journal
https://www.readbyqxmd.com/read/29226900/diffuse-hypoplasia-of-the-aortic-arch-and-isthmus-in-a-patient-with-williams-syndrome
#5
İsmihan Selen Onan, Erkut Öztürk, Aylin Demirel Başgöze, Ayse Çicek, Burak Onan
Williams syndrome is a rare neurodevelopmental disorder characterized by mental retardation, growth deficiency, hypercalcemia, cardiac defects, and a distinctive facial appearance. Cardiovascular abnormalities are present in approximately 80% of Williams syndrome patients. Surgical treatment is generally performed for supravalvular aortic stenosis, aortic coarctation, pulmonary artery stenosis, or ventricular septal defect. In rare cases, diffuse hypoplasia of the aortic arch with a normal left ventricular outflow tract and ascending aorta may be diagnosed in early childhood...
December 2017: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/29187218/open-stent-graft-repair-with-upper-half-sternotomy-for-blunt-thoracic-aortic-injury-a-case-report
#6
Toshinori Komatsu, Tamaki Takano, Hiromu Kehara, Megumi Fuke, Takamitsu Terasaki, Masayuki Sakaguchi
BACKGROUND: Thoracic endovascular aortic repair is now widely applied to the treatment of blunt aortic injury. However, its long-term outcomes remain unclear. Endoleakage and migration might occur in the long term, especially when younger patients undergo endovascular aortic repair. In open stent grafting, the proximal end of the open stent graft is directly sutured to the native aorta, which may reduce the risk of endoleakage and migration. We applied open stent grafting to the treatment of blunt aortic injury in the subacute phase and herein report the patient's clinical course...
November 29, 2017: Journal of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/29170884/is-retrograde-blood-flow-of-aortic-isthmus-useful-for-the-prenatal-screening-of-coarctation-of-the-aorta-by-fetal-color-doppler-echocardiography-a-preliminary-study
#7
Hiroshi Kawamura, Noboru Inamura, Yuka Inoue, Yukiko Kawazu, Futoshi Kayatani, Nobuaki Mitsuda
PURPOSE: To validate the relationship between retrograde blood flow in the aortic isthmus (AoI-R) by color Doppler in fetal echocardiography and postnatal coarctation of the aorta (CoA) diagnosed as isthmus narrowing. METHODS: This was a retrospective study of 22 cases of prenatally suspected simple CoA or CoA with small ventricular septum defect based on fetal echocardiography performed by pediatric cardiologists in our hospital. Gestational age at the first detection of AoI-R and the optimal cut-off value for the prediction of postnatal CoA were mainly evaluated according to the postnatal diagnosis of CoA...
November 23, 2017: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/29094424/fetal-sheep-central-haemodynamics-and-cardiac-function-during-occlusion-of-the-ascending-aorta
#8
Heikki Huhta, Juulia Junno, Mervi Haapsamo, Tiina Erkinaro, Pasi Ohtonen, Lowell E Davis, A Roger Hohimer, Ganesh Acharya, Juha Rasanen
What is the central question of this study? The fetal aortic isthmus has an important physiological role, allowing communication between the left and right ventricular outputs, which are arranged in parallel. Can the aortic isthmus provide unrestrictive communication between the left and right ventricular circulations during occlusion of the ascending aorta? What is the main finding and its importance? During occlusion of the ascending aorta, fetal carotid artery perfusion pressure fell significantly, showing that the aortic isthmus failed to redirect blood flow and pressure from the ductus arteriosus to the aortic arch...
January 1, 2018: Experimental Physiology
https://www.readbyqxmd.com/read/29075526/supravalvar-mitral-ring-with-a-parachute-mitral-valve-and-subcoarctation-of-the-aorta-in-a-child-with-hemodynamically-significant-vsd-a-study-of-the-morphology-echocardiographic-diagnostics-and-surgical-therapy
#9
Wojciech Mądry, Maciej A Karolczak, Krzysztof Grabowski
The authors present a case of echocardiographic diagnosis of supravalvar mitral ring (a fibromembranous structure that arose from the atrial surface of the mitral leaflets) in a child with a parachute mitral valve, a ventricular septal defect, and mild narrowing of the aortic isthmus. The supravalvar mitral stenosis is a typical but very infrequently detected element of the complex of anatomical abnormalities located within the left heart and the proximal aorta, called the Shone's complex (syndrome). Diagnosing an additional, hemodynamically significant anatomic defect during echocardiography was possible thanks to the detection of marked mobility limitation of the ring-adjacent part of the mitral valve mural leaflet as well as of an atypical image of turbulence occurring during the inflow from the left atrium to the left ventricle...
September 2017: Journal of Ultrasonography
https://www.readbyqxmd.com/read/29034019/hybrid-repair-of-an-abdominal-aortic-aneurysm-debranching-with-endovascular-aneurysm-repair-in-a-patient-with-horseshoe-kidney
#10
Keiwa Kin, Hiroshi Takano, Takaya Nakagawa, Yukitoshi Shirakawa
Abdominal aortic aneurysm (AAA) with associated horseshoe kidney (HSK) poses a technical challenge when performing conventional open surgical repair because of possible complications including renal infarction, neuralgia, and collecting system disruption. Endovascular aortic repair (EVAR) is considered the first-line treatment for this pathology, allowing for aneurysm repair without isthmus bisection. However, whether to sacrifice commonly presenting aberrant renal arteries during EVAR is a point of controversy...
March 24, 2017: Annals of Vascular Diseases
https://www.readbyqxmd.com/read/29030063/immediate-and-midterm-results-of-balloon-angioplasty-for-recurrent-aortic-coarctation-in-children-aged-1-year
#11
Bruno Lefort, Matthias Lachaud, Jean Marc El Arid, Paul Neville, Nathalie Soulé, Patrice Guérin, Alain Chantepie
BACKGROUND: Several publications have considered results of percutaneous angioplasty for aortic recoarctation, but none focused on procedures performed in children aged<1 year. AIMS: To describe the immediate and midterm results of balloon angioplasty for recoarctation before the age of 1 year, and to define the factors that might influence outcome. METHODS: We retrospectively reviewed data from 20 consecutive children undergoing percutaneous dilatation for aortic recoarctation before the age of 1 year in the University Hospitals of Tours and Nantes...
October 10, 2017: Archives of Cardiovascular Diseases
https://www.readbyqxmd.com/read/28985746/porcine-model-of-progressive-cardiac-hypertrophy-and-fibrosis-with-secondary-postcapillary-pulmonary-hypertension
#12
Mariann Gyöngyösi, Noemi Pavo, Dominika Lukovic, Katrin Zlabinger, Andreas Spannbauer, Denise Traxler, Georg Goliasch, Ljubica Mandic, Jutta Bergler-Klein, Alfred Gugerell, Andras Jakab, Zsuzsanna Szankai, Levente Toth, Rita Garamvölgyi, Gerald Maurer, Frederic Jaisser, Faiez Zannad, Thomas Thum, Sándor Bátkai, Johannes Winkler
BACKGROUND: Meaningful translational large animal models for cardiac diseases are indispensable for studying disease mechanisms, development of novel therapeutic strategies, and evaluation of potential drugs. METHODS: For induction of heart failure, cardiac hypertrophy and fibrosis, a bare metal stent was implanted in the descending aorta of growing pigs (n = 7), inducing pressure stress on the left ventricle (group HYPI). The constant stent size in growing pigs resulted in antegrade partial obstruction of the aortic flow with a gradual increase in afterload...
October 6, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28955395/the-mid-term-results-of-thoracoscopic-closure-of-atrial-septal-defects
#13
Heemoon Lee, Ji-Hyuk Yang, Tae-Gook Jun, I-Seok Kang, June Huh, Seung Woo Park, Jinyoung Song, Chung Su Kim
BACKGROUND AND OBJECTIVES: Recently, minimally invasive surgical (MIS) techniques including robot-assisted operations have been widely applied in cardiac surgery. The thoracoscopic technique is a favorable MIS option for patients with atrial septal defects (ASDs). Accordingly, we report the mid-term results of thoracoscopic ASD closure without robotic assistance. SUBJECTS AND METHODS: We included 66 patients who underwent thoracoscopic ASD closure between June 2006 and July 2014...
September 2017: Korean Circulation Journal
https://www.readbyqxmd.com/read/28918426/aortic-isthmus-flow-recording-predicts-the-outcome-of-the-recipient-twin-after-laser-coagulation-in-twin-twin-transfusion-syndrome
#14
France Leduc, Amélie Delabaere, Roxanne Gendron, Florent Fuchs, Sandrine Wavrant, Marie-Josée Raboisson, Jean-Claude Fouron, François Audibert
INTRODUCTION: The objective was to assess the prognostic value of the systolic flow through the aortic isthmus in monochorionic pregnancies complicated by twin-twin transfusion syndrome (TTTS) treated by placental laser ablation. MATERIAL AND METHODS: Fetal echocardiography and outcome data of 105 cases of TTTS treated by laser photocoagulation of placental anastomoses were reviewed. Hemodynamic parameters were collected before and after treatment. The isthmic systolic index (ISI) was calculated as the peak systolic velocity/systolic nadir ratio...
September 16, 2017: Fetal Diagnosis and Therapy
https://www.readbyqxmd.com/read/28893706/hypertension-acute-stent-thrombosis-and-paraplegia-6-months-after-thoracic-endovascular-aortic-repair-for-blunt-thoracic-aortic-injury-in-a-22-year-old-patient
#15
Ombretta Martinelli, Federico Faccenna, Alban Malaj, Jihad Jabbour, Salvatore Venosi, Roberto Gattuso, Bruno Gossetti, Luigi Irace
Thoracic endovascular aortic repair (TEVAR) is a less invasive option for managing traumatic injuries of the descending aorta in polytraumatized patients. Concerns arise when treating young patients with TEVAR. A 22-year-old male was admitted to the emergency department following a high-impact road traffic collision. Whole-body computed tomography (CT) scan documented multiple injuries, including rupture of descending thoracic aorta just below the isthmus. There was no evidence of paraplegia or stroke. We decided to treat him in an endovascular fashion with a Zenith Cook (Cook Incorporated, Bloomington, IN) endograft...
February 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28833523/modeling-of-coarctation-of-aorta-in-human-fetuses-using-3d-4d-fetal-echocardiography-and-computational-fluid-dynamics
#16
Zhuo Chen, Yue Zhou, Jingying Wang, Xiaowei Liu, Shuping Ge, Yihua He
OBJECTIVES: We sought to develop a hemodynamic model of aortic and ductal arches using computational fluid dynamics (CFD) and 3D/4D spatio-temporal image correlation (STIC) fetal echocardiography and to investigate the hemodynamics of coarctation of aorta (CoA) in human fetuses using this approach. METHODS: We obtained 3D/4D STIC fetal echocardiographic images of the aortic and ductal arches (DA) in five normal fetuses. Based on these images, we simulated the hemodynamics in the two arches using CFD...
December 2017: Echocardiography
https://www.readbyqxmd.com/read/28695721/aortic-isthmus-shunt-dynamics-in-normal-and-complicated-monochorionic-pregnancies
#17
Viola Seravalli, Dana Block-Abraham, Cyrethia McShane, Sarah Millard, Ahmet Baschat, Jena Miller
OBJECTIVE: To study fetal aortic isthmus (AoI) shunt dynamics in monochorionic (MC) twins. METHODS: Normal and complicated MC pregnancies were prospectively enrolled. The relationship of isthmus flow index (IFI) with Doppler parameters of umbilical artery (UA), descending aorta, middle cerebral artery, and ductus venosus and with left and right ventricular cardiac output and stroke volume was studied. RESULTS: The IFI was obtained in 180 examinations from 48 pregnancies (24 twin-twin transfusion syndrome, TTTS; 4 selective intrauterine growth restriction, sIUGR; 12 TTTS + sIUGR; and 8 uncomplicated)...
September 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28668226/sustained-chronic-maternal-hyperoxygenation-increases-myocardial-deformation-in-fetuses-with-a-small-aortic-isthmus-at-risk-for-coarctation
#18
Shi Zeng, Jiawei Zhou, Qinghai Peng, Wen Deng, Ming Zang, Tao Wang, Qichang Zhou
BACKGROUND: We aimed to assess differences in myocardial deformation in fetuses at risk for coarctation (CoA) and the effects of maternal hyperoxygenation on deformation. METHODS: Fetal echocardiography and velocity vector imaging were performed prospectively and serially in 48 fetuses with a small aortic isthmus and 48 gestation age-matched normal fetuses. Fetuses with a small aortic isthmus were randomly divided into two groups: one group with and the other group without maternal supplemental oxygen administration...
October 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28666489/atresia-of-the-descending-aorta-in-a-young-woman-requiring-bypass-graft
#19
Adcasdc Sadfasdf Dsc, Ammarah Mashhood, Taimur Asif Ali, Saulat Hasnain Fatimi
Congenital aortic atresia is a malformation accounting for 4 - 6% of all congenital heart diseases in children. Left ventricular outflow obstruction due to atresia is common at the aortic valve but rarely has atresia been identified in the descending aorta. We report the case of a 25-year woman who was evaluated for headache and uncontrolled hypertension. CTscan chest showed a short atretic segment in the descending aorta at the isthmus, distal to the takeoff of the subclavian artery. She underwent surgery; a 22 mm Dacron graft was taken and jump graft was placed between the arch of the aorta and the descending aorta, using partial occlusion clamps...
November 2016: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28660196/endovascular-repair-of-traumatic-isthmic-ruptures-special-concerns
#20
REVIEW
Nikolaos Patelis, Athanasios Katsargyris, Chris Klonaris
Injury of the aortic isthmus is the second most frequent cause of death in cases of blunt traumatic injury. Conventional open repair is related to significant morbidity and mortality. Thoracic endovascular aortic repair (TEVAR) has increasing role in traumatic isthmic rupture, as it avoids the thoracotomy-related morbidity, aortic cross clamping, and cardiopulmonary bypass. Additionally to the technical difficulties of open repair, multi-trauma patients may not tolerate the manipulations necessary to undergo open surgery, due to concomitant injuries...
2017: Frontiers in Surgery
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