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Aortic isthmus

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https://www.readbyqxmd.com/read/28695721/aortic-isthmus-shunt-dynamics-in-normal-and-complicated-monochorionic-pregnancies
#1
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 (DAo), middle cerebral artery (MCA), and ductus venosus (DV), 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; 8 uncomplicated)...
July 11, 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
#2
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...
June 28, 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
#3
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
#4
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
https://www.readbyqxmd.com/read/28659571/chest-pain-and-sudden-onset-paraplegia-at-the-emergency-department-an-uncommon-presentation
#5
Feng Han Chiu, Shih Hung Tsai, Cheng Hsuan Ho
BACKGROUND Coarctation of the aorta is characterized by narrowing of the descending aorta. The narrowing typically is at the isthmus, the segment just distal to the left subclavian artery. Adults with undiagnosed aortic coarctation are asymptomatic or may present with nonspecific hypertension. We present a case that highlights the uncommon complication of aortic coarctation with spinal compression syndrome. CASE REPORT A 45-year-old male presented to the emergency department (ED) with acute-onset chest pain; he experienced urinary incontinence and bilateral lower limb weakness during his ED visit...
June 29, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28627028/common-findings-in-late-gestation-fetal-echocardiography
#6
Lauren Tague, Mary T Donofrio, Amanda Fulgium, Robert McCarter, Catherine Limperopoulos, David N Schidlow
OBJECTIVES: Fetal echocardiography provides detailed information about cardiac structure and function in utero. Limited information is available regarding normal findings late in pregnancy. We therefore sought to identify and describe common cardiac findings in late gestation. METHODS: Fetuses with structurally normal hearts were identified in mid gestation within a subset of pregnant women in a prospective study. The atrioventricular valves, right and left atria, aortic isthmus and ductus arteriosus dimensions and flow abnormalities, aneurysm of the septum primum, and presence and grade of tricuspid regurgitation were assessed throughout pregnancy...
June 19, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28623881/cardiac-tamponade-associated-with-delayed-ascending-aortic-perforation-after-blunt-chest-trauma-a-case-report
#7
Dae Woong Ryu, Mi Kyung Lee
BACKGROUND: Cardiac tamponade due to aortic injury after blunt trauma is a rare and potentially fatal injury. Most aortic injuries caused by blunt trauma present as aortic dissection or rupture of the aortic isthmus. Several cases of delayed aortic injury have been reported. However, all of these injuries were observed in the descending aorta because they had been caused by a posterior rib fracture. CASE PRESENTATION: We report the first case of cardiac tamponade associated with delayed ascending aortic perforation 2 weeks after blunt trauma...
June 17, 2017: BMC Surgery
https://www.readbyqxmd.com/read/28587739/aortic-valve-pathology-as-a-predictive-factor-for-acute-aortic-dissection
#8
Denis Berdajs, Selim Mosbahi, Enrico Ferrari, Dominique Charbonnier, Ludwig K von Segesser
BACKGROUND: In this study, the effect of aortic valve (AV) pathology on local hemodynamic conditions was evaluated as a potential trigger for the onset of acute type A and B aortic dissection. METHODS: A time- and pressure-related four-dimensional (4-D) computed fluid dynamic model of the aorta was established. In an experimental setup, AV stenosis and AV insufficiency were created. 4-D pressure-related geometry of the aortic root (AR) with valve insufficiency and valve stenosis were determined by high-fidelity (200 Hz) microsonometric crystals...
June 3, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28294669/-visceral-complications-of-the-aortic-dissections-indications-and-technique-of-the-thoracoabdominal-refenestration
#9
Csaba Dzsinich, Jenő Szolnoky, Gábor Vallus, Gábor Darabos, Gabriella Nyiri, Dániel Teknős
Aortic dissection is a life threatening cardiovascular catastrophy. Its incidence estimated to 5-6 cases per 100,000 patients/year. The intimal tear happens at the ascending aorta in Type A, meanwhile at the aortic isthmus in Type B, but entry point may develop anywhere alongside the entire aorta. All types may affect a short aortic segment resulting in a localized false aneurysm, others separate the intimal layer at longer extension down to the visceral segment and far beyond to the femoral arteries. Dissection of orifices of side branches may lead to cerebral, upper extremity, spinal, visceral, renal and lower extremity malperfusion...
March 2017: Magyar Sebészet
https://www.readbyqxmd.com/read/28238239/ablation-of-macro-re-entrant-atrial-arrhythmia-late-after-surgical-aortic-valve-replacement
#10
Michał Orczykowski, Paweł Derejko, Piotr Urbanek, Robert Bodalski, Katarzyna Kodziszewska, Radosław Sierpiński, Rafał Baranowski, Maria Bilińska, Łukasz Szumowski
BACKGROUND: Re-entrant atrial arrhythmias are common in patients after cardiac surgery. To date, however, no studies have reported the safety and efficacy of radiofrequency (RF) ablation of macro-re-entrant atrial arrhythmias in a unique, homogeneous group of patients after surgical replacement of the aortic valve and single right atriotomy. METHODS: Among over 4,000 RF catheter ablations performed at the authors' center between 2008 and 2014, eight patients (seven males, one female; mean age 55...
September 2016: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28174405/-thoracic-endovascular-aortic-repair-for-a-descending-thoracic-aneurysm-associated-with-pseudocoarctation-of-the-aorta-report-of-a-case
#11
Hiroaki Aida, Satoru Kagaya, Kazuo Abe
A 77-year-old man with a descending thoracic aneurysm associated with pseudocoarctation of the aorta underwent thoracic endovascular aortic repair (TEVAR). Computed tomography demonstrated kinking of the descending thoracic aorta. The aneurysm was located distal to a kinking and constricting aortic isthmus. TEVAR was performed because of the patient's comorbidity such as valvular heart diseases and postradiation status for the thoracic Hodgkin disease. TEVAR was successful but small aortic dissection was occurred distal to the stentgraft...
February 2017: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/28139441/normative-values-of-aortic-arch-structures-in-premature-infants
#12
Elles J Dijkema, Mirella C Molenschot, Johannes M P J Breur, Willem B de Vries, Martijn G Slieker
BACKGROUND: Aortic arch abnormalities represent 5% to 8% of all congenital heart disease. Measurements of the aortic arch dimensions on two-dimensional echocardiographic images remain of critical importance in the diagnosis of aortic arch pathology. To define aortic hypoplasia or coarctation, measured dimensions must be compared with normal values. Normal values have been described for children of all ages in earlier studies. However, normative data for premature infants are not yet available...
March 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28095343/patient-tailored-management-of-an-asymptomatic-massive-substernal-goiter-presenting-as-brachiocephalic-vein-occlusion-report-of-a-case-and-review-of-sternotomy-indications
#13
Georgios Sahsamanis, Eleftherios Chouliaras, Konstantinos Katis, Stavros Samaras, Stavros Daliakopoulos, Georgios Dimitrakopoulos
INTRODUCTION: Substernal goiters are characterized by the protrusion of at least 50% of the thyroid mass below the level of the thoracic inlet. Still their definition is controversial. CASE PRESENTATION: The case refers to a 44year old male who presented to our department due to swelling and a feeling of 'heaviness' of his left upper extremity for the past 6 months. CT scan revealed a massive substernal goiter extending to the great vessels. Intraoperatively, a median sternotomy was performed due to the size of the gland and the close adhesion of the isthmus and lower left thyroid lobe to the brachiocephalic vein...
2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28088428/aortic-floating-thrombus-detected-by-computed-tomography-angiography-incidentally-five-cases-and-a-literature-review
#14
Shuyi Yang, Jie Yu, Wenjuan Zeng, Liang Yang, Lin Teng, Yue Cui, Heshui Shi
OBJECTIVE: To analyze the findings of aortic floating thrombus (AFT) on computed tomography angiography (CTA) for a definitive, timely diagnosis and to select a reasonable management course to improve prognosis. METHOD: We retrospectively analyzed imaging findings of 5 patients with AFT detected by CTA, including location, morphology, size, involved aortic segment, concomitant embolism, stent, and dynamic changes during the follow-up. RESULTS: Seven lesions were detected in the initial CTA studies of the 5 patients: 5 aortic intraluminal floating thrombi (3 patients) and 2 aortic in-stents floating thrombi (ASFTs; 2 patients)...
December 22, 2016: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28045418/primary-coarctation-related-isthmus-aneurysm-in-an-adult
#15
Jose María González-Santos, María Elena Arnáiz-García, María José Dalmau-Sorlí, Javier Rodríguez-Collado, Javier López Rodríguez
A 56-year-old female patient was transferred due to the presence of a left supraclavicular pulsatile mass. Further work-up was performed to confirm diagnosis. Angiography and computed tomography were also performed. The anatomy of the thoracic aorta suggested an unknown and untreated aortic coarctation. A second aortic narrowing was identified at the aortic arch, a result of elongation of the aorta. Endovascular approach was not possible, due to complexity of the aortic anatomy, and tortuosity. Open surgical repair was successfully performed...
December 2016: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/28043994/long-term-results-following-emergency-stent-graft-repair-for-traumatic-rupture-of-the-aortic-isthmus
#16
Cecile Martin, Frederic Thony, Mathieu Rodiere, Pierre Bouzat, Pierre Lavagne, Michel Durand, Olivier Chavanon
Objectives: Endovascular repair of traumatic injury of the aortic isthmus is a safe technique that has shown good short-term results. However, the future of these stent grafts remains unexamined, especially in relation to young patients. Methods: Between January 2000 and December 2014, 60 patients were treated with endovascular aortic stent graft for injury of the aortic isthmus. Follow-up was done by computed tomography scans with intravenous contrast or magnetic resonance imaging associated with a chest X-ray in order to control the stent graft...
April 1, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28034902/risk-factors-for-coarctation-of-the-aorta-on-prenatal-ultrasound-a-systematic-review-and-meta-analysis
#17
REVIEW
Alessandra Familiari, Maddalena Morlando, Asma Khalil, Sven-Erik Sonesson, Carolina Scala, Giuseppe Rizzo, Gelsomina Del Sordo, Chiara Vassallo, Maria Elena Flacco, Lamberto Manzoli, Antonio Lanzone, Giovanni Scambia, Ganesh Acharya, Francesco D'Antonio
BACKGROUND: Prenatal diagnosis of coarctation of the aorta (CoA) is still challenging and affected by high rates of false-positive diagnoses. The aim of this study was to ascertain the strength of association and to quantify the diagnostic accuracy of different ultrasound signs in predicting CoA prenatally. METHODS: Medline, Embase, CINAHL, and Cochrane databases were searched. Random-effects and hierarchical summary receiver operating characteristic model meta-analyses were used to analyze the data...
February 21, 2017: Circulation
https://www.readbyqxmd.com/read/27982102/sustained-maternal-hyperoxygenation-improves-aortic-arch-dimensions-in-fetuses-with-coarctation
#18
Shi Zeng, Jiawei Zhou, Qinghai Peng, Wen Deng, Ming Zhang, Yili Zhao, Tao Wang, Qichang Zhou
The aim was to investigate the impact of maternal hyperoxygenation (HO) on cardiac dimensions in fetuses with isolated Coarctation (CoA). Fetal echocardiography was performed serially in 48 fetuses with CoA and gestation age matched normal fetues. The Z-scores for the mitral valve (MV), tricuspid valve (TV), aortic valve (AV), ascending aorta (AAo), isthmus, pulmonary valve (PV), main pulmonary artery (MPA), and descending aorta (DAo) were measured and compared among normal fetuses, CoA fetuses with oxygen and CoA fetuses with air...
December 16, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27943499/prenatal-diagnosis-and-prognosis-of-accelerate-idioventricular-rhythm
#19
Jean-Claude Fouron, Ariane McNeal-Davidson, Sylvia Abadir, Anne Fournier, Jean-Luc Bigras, Christine Boutin, Myriam Brassard, Marie-Josée Raboisson, Nicolaas van Doesburg, Annie Berger, Sophie Brisebois, Roxanne Gendron
OBJECTIVES: Since postnatal identification of accelerated idioventricular rhythm (AIVR) is essentially based on specific electrocardiographic patterns, its prenatal diagnosis is challenging and its genuine incidence undetermined. Therefore the objectives of this study are: 1) To evaluate the performance of specific ultrasonographic approaches in intrauterine identification of cardiocirculatory events linked to electrocardiographic signs of AIVR, including its left or right ventricular origin, and 2) To assess the prenatal prognosis of the arrhythmia...
December 10, 2016: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/27895881/morphologic-evaluation-of-ductus-diverticulum-using-multi-detector-computed-tomography-comparison-with-traumatic-pseudoaneurysm-of-the-aortic-isthmus
#20
Jun Hyung Ann, Eun Young Kim, Yu Mi Jeong, Jeong Ho Kim, Hyung Sik Kim, Hye-Young Choi
OBJECTIVES: To evaluate morphologic variations at the aortic isthmus with particular attention to ductus diverticulum, a mimicker of traumatic pseudoaneurysm, and to describe differences using Computed Tomography (CT) images. PATIENTS AND METHODS: From December 2013 to December 2014, patients who underwent a chest CT examination after blunt trauma at our emergency department were included. Aortic isthmus morphologies were evaluated using multiplanar reconstruction (MPR) and maximum intensity projection (MIP) images as follows...
October 2016: Iranian Journal of Radiology: a Quarterly Journal Published By the Iranian Radiological Society
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