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3D aortic dissection

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https://www.readbyqxmd.com/read/27858229/usefulness-of-three-dimensional-transesophageal-echocardiography-for-diagnosis-of-hemolytic-anemia-due-to-inverted-internal-felt-strip-after-surgery-for-aortic-dissection
#1
Takeshi Oda, Hiroshi Yasunaga, Yasuyuki Zaima, Akiko Arimura, Shinichi Imai, Ryo Kanamoto, Hayato Fukuda, Eiji Nakamura, Hideki Tashiro, Shigeaki Aoyagi
Felt strips are widely used for reinforcement of the aortic stump in surgery for aortic dissection (AD). Postoperative hemolytic anemia (HA) due to an inverted internal felt strip at the aortic stump fixation for AD is extremely rare. A 70-year-old woman underwent ascending aorta replacement for acute type A AD, where both proximal and distal anastomotic sites were reinforced with Teflon felt strips. A week later, macroscopic hematuria and HA emerged. Three-dimensional transesophageal echocardiography (3D-TEE) demonstrated that the proximal inner felt strip turned up and protruded into the aortic inner lumen...
November 17, 2016: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/27754006/js-ish-esh-2-update-on-the-detection-and-follow-up-of-early-hypertensive-heart-disease
#2
Enrico Agabiti Rosei
Current Hypertension Guidelines emphasize the importance of assessing the presence of preclinical organ damage. In fact, an extensive evaluation of organ damage may increase the number of patients classified at high CV risk and therefore strongly influence the clinical management of patients. Hypertensive heart disease remains to date the form of organ damage for which there is the greatest amount of evidence of a strong independent prognostic significance. In the presence of a chronic pressure overload, a parallel addition of sarcomers takes place with an increase in myocyte width, which in turn increases left ventricular wall thickness; myocyte hypertrophy is also associated with apoptosis, collagen deposition and ventricular fibrosis with an impairment of coronary hemodynamics as well, thus profoundly influencing functional properties of the left (and right) ventricle...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27650342/the-role-of-transesophageal-echocardiography-in-aortic-surgery
#3
REVIEW
Martina Nowak-Machen
Aortic disease, when left untreated, is still associated with major morbidity and mortality. Aortic dissection and aortic aneurysm are the main reasons for performing aortic surgery procedures in the adult. Imaging techniques such as computed tomography and magnetic resonance imaging play a key role in the preoperative evaluation. Transesophageal echocardiography (TEE) has become a safe and invaluable perioperative imaging tool for aortic disease over the past decade with high sensitivity and specificity. TEE can increase patient safety and improve overall patient outcome in aortic surgery...
September 2016: Best Practice & Research. Clinical Anaesthesiology
https://www.readbyqxmd.com/read/27642917/js-ish-esh-2-update-on-the-detection-and-follow-up-of-early-hypertensive-heart-disease
#4
Enrico Agabiti Rosei
Current Hypertension Guidelines emphasize the importance of assessing the presence of preclinical organ damage. In fact, an extensive evaluation of organ damage may increase the number of patients classified at high CV risk and therefore strongly influence the clinical management of patients. Hypertensive heart disease remains to date the form of organ damage for which there is the greatest amount of evidence of a strong independent prognostic significance. In the presence of a chronic pressure overload, a parallel addition of sarcomers takes place with an increase in myocyte width, which in turn increases left ventricular wall thickness; myocyte hypertrophy is also associated with apoptosis, collagen deposition and ventricular fibrosis with an impairment of coronary hemodynamics as well, thus profoundly influencing functional properties of the left (and right) ventricle...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27251467/the-interactive-use-of-multi-dimensional-modeling-and-3d-printing-in-preplanning-of-type-a-aortic-dissection
#5
Abdullrazak Hossien, Sandro Gesomino, Jos Maessen, Rüdiger Autschbach
We report a technique of multidimensional modeling and 3D printing in preplanning of Type A acute aortic dissection (TAAD) repair. doi: 10.1111/jocs.12772 (J Card Surg 2016;31:441-445).
July 2016: Journal of Cardiac Surgery
https://www.readbyqxmd.com/read/27187867/nontraumatic-subclavian-artery-abnormalities-spectrum-of-mdct-findings
#6
Christopher Scott Jones, Franco Verde, Pamela T Johnson, Elliot K Fishman
OBJECTIVE: The subclavian arteries (SCAs) may exhibit a wide spectrum of nontraumatic pathologic conditions ranging from common diseases, such as atherosclerosis, to vascular emergencies that are associated with a high morbidity and high mortality, such as type A aortic dissection and acute arterial thrombosis. MDCT angiography is an excellent modality to diagnose pathologic conditions of the SCAs. CONCLUSION: Optimization of CT acquisition protocols and interactive interpretation with 2D multiplanar reformatting and 3D rendering techniques are critical for diagnostic accuracy...
August 2016: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/26970889/mechanical-strength-of-aneurysmatic-and-dissected-human-thoracic-aortas-at-different-shear-loading-modes
#7
Gerhard Sommer, Selda Sherifova, Peter J Oberwalder, Otto E Dapunt, Patricia A Ursomanno, Abe DeAnda, Boyce E Griffith, Gerhard A Holzapfel
Rupture of aneurysms and acute dissection of the thoracic aorta are life-threatening events which affect tens of thousands of people per year. The underlying mechanisms remain unclear and the aortic wall is known to lose its structural integrity, which in turn affects its mechanical response to the loading conditions. Hence, research on such aortic diseases is an important area in biomechanics. The present study investigates the mechanical properties of aneurysmatic and dissected human thoracic aortas via triaxial shear and uniaxial tensile testing with a focus on the former...
August 16, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/26897833/novel-method-of-assessing-ascending-aorta-with-a-stenotic-bicuspid-aortic-valve
#8
Kaoru Hattori, Ikuo Fukuda, Kazuyuki Daitoku, Wakako Fukuda, Masahito Minakawa, Yasuyuki Suzuki
BACKGROUND AND AIM OF THE STUDY: Patients with bicuspid aortic valve (BAV) have an increased risk of serious aortic complications such as aortic dissection, rupture and dilatation of the ascending aorta. Previous findings have suggested that ascending aortic dilatation with a BAV has a typical asymmetric configuration at the right-anterior aspect of the aorta. The study aim was to quantify asymmetric configurations of the aorta using a three-dimensional (3D) reconstruction tool. METHODS: A retrospective review was conducted of 52 patients (27 males, 25 females; mean age 69 ? 9 years) with aortic stenosis who presented with ascending aortic dilatation defined as an aortic diameter >35 mm...
September 2015: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/26549722/-a-case-of-percutaneous-transluminal-angioplasty-and-stenting-for-dacron-bypass-graft-stenosis-with-cerebral-infarction
#9
Hiroyuki Matsumoto, Hideki Takemoto, Hirokazu Nishiyama, Yoshiaki Tetsuo, Shinichi Higashiue, Naoyuki Nakao
A 62-year-old man presented to the emergency room with mild dysarthria and right motor weakness. The patient was diagnosed with aortic dissection (DeBakey type III) in the cardiovascular department of our institution two years ago and was then treated with left carotid-bilateral subclavian bypass with collagen-seated Dacron graft followed by thoracic endovascular aortic repair (TEVER) with stent-graft placement. Magnetic resonance imaging on admission showed cerebral infarction with left proximal middle cerebral artery occlusion in the left cerebral hemisphere...
November 2015: No Shinkei Geka. Neurological Surgery
https://www.readbyqxmd.com/read/26497737/intracardiac-echocardiography-for-guidance-of-transcatheter-aortic-valve-implantation-under-monitored-sedation-a-solution-to-a-dilemma
#10
REVIEW
Thomas Bartel, Ahmad Edris, Corinna Velik-Salchner, Silvana Müller
Transcatheter aortic valve implantation (TAVI) has been established as a valuable alternative to surgical aortic valve replacement in patients deemed to have high or prohibitive perioperative risk. However, there are several technical constraints and procedural risks inherent to TAVI. These risks include annulus rupture, ventricular perforation, aortic dissection, coronary occlusion, and dislodgement or migration of the valve prosthesis to the aorta or the left ventricle (LV). Other complications may be related to inappropriate valve deployment and subsequent paravalvular leak...
January 2016: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/26443843/n-2-aminoethyl-ethanolamine-induced-morphological-biochemical-and-biophysical-alterations-in-vascular-matrix-associated-with-dissecting-aortic-aneurysm
#11
Zhenping Chen, Ya Xu, Paul Bujalowski, Andres F Oberhauser, Paul J Boor
Dissecting aortic aneurysm (DAA) is an extended tear in the wall of the aorta along the plane of the vascular media. Our previous studies indicated in a developmental animal model, that DAA was related to pathological alteration in collagen, especially collagen type III. Accordingly, in the present studies, neonatal aortic vascular smooth muscle cells (VSMC) and timed pregnant Sprague-Dawley rat dams were treated with N-(2-aminoethyl) ethanolamine (AEEA), which, as shown previously, causes DAA in offspring...
December 2015: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/26329715/-tension-hemothorax-associated-with-spontaneous-rupture-of-the-thoracic-aorta-report-of-a-case
#12
Chihiro Yoshida, Yutarou Yamamoto, Souichirou Sasa, Hisashi Matsuoka, Norihiro Hokimoto, Hiromichi Yamai, Kazuhisa Ohnishi, Nobuyuki Tanida, Noriaki Fujishima, Nobumasa Hamaguchi, Youichi Ichikawa, Kazutoshi Tano
A 94-year-old woman was admitted to our hospital with sudden onset of chest pain without any episode of trauma. Computed tomography(CT) revealed left massive pleural effusion and extravasation of contrast medium from the side chest wall to the back. Neither aortic aneurysm nor dissection was evident. During the investigation, the patient went into hypovolemic shock. Hemothorax due to bleeding from an intercostal artery was diagnosed, and emergency surgery was performed. A 1-mm hole was detected in the descending aorta, and closed by a single suture...
August 2015: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/26320518/impact-of-synchrotron-radiation-based-x-ray-phase-contrast-tomography-on-understanding-various-cardiovascular-surgical-pathologies
#13
Takuro Tsukube, Naoto Yagi, Masato Hoshino, Yutaka Nakashima, Kazunori Nakagawa, Yutaka Okita
At SPring-8, synchrotron radiation-based X-ray phase-contrast tomography (PCXI) has been developed to measure the inner structures of biological soft tissue without destroying them. To resolve the three-dimensional (3D) morphology, we have applied PCXI to various cardiovascular tissue samples, including the thoracic aorta, ductus arteriosus, and cardiac conduction system. In the aortic walls, PCXI demonstrated differences in 3D structures of tunica media of aortic dissection. These findings correlated well with the irregularity of the structure of the media...
October 2015: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/26319128/increasing-the-feasibility-of-minimally-invasive-procedures-in-type-a-aortic-dissections-a-framework-for-segmentation-and-quantification
#14
COMPARATIVE STUDY
Cosmin Adrian Morariu, Tobias Terheiden, Daniel Sebastian Dohle, Konstantinos Tsagakis, Josef Pauli
PURPOSE: Our goal is to provide precise measurements of the aortic dimensions in case of dissection pathologies. Quantification of surface lengths and aortic radii/diameters together with the visualization of the dissection membrane represents crucial prerequisites for enabling minimally invasive treatment of type A dissections, which always also imply the ascending aorta. METHODS: We seek a measure invariant to luminance and contrast for aortic outer wall segmentation...
February 2016: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/26306837/dissecting-abdominal-aortic-aneurysm-in-angiotensin-ii-infused-mice-the-importance-of-imaging
#15
REVIEW
Bram Trachet, Rodrigo A Fraga-Silva, Alessandra Piersigilli, Patrick Segers, Nikolaos Stergiopulos
INTRODUCTION: Since the initial publication in 2000, Angiotensin II-infused mice have become one of the most popular models to study abdominal aortic aneurysm in a pre-clinical setting. We recently used phase contrast X-ray based computed tomography to demonstrate that these animals develop an apparent luminal dilatation and an intramural hematoma, both related to mural ruptures in the tunica media in the vicinity of suprarenal side branches. AIMS: The aim of this narrative review was to provide an extensive overview of small animal applicable techniques that have provided relevant insight into the pathogenesis and morphology of dissecting AAA in mice, and to relate findings from these techniques to each other and to our recent PCXTM-based results...
2015: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/26234839/individualizing-management-of-complex-esophageal-pathology-using-three-dimensional-printed-models
#16
Karen J Dickinson, Jane Matsumoto, Stephen D Cassivi, J Matthew Reinersman, Joel G Fletcher, Jonathan Morris, Louis M Wong Kee Song, Shanda H Blackmon
PURPOSE: In complex esophageal cases, conventional two-dimensional imaging is limited in demonstrating anatomic relationships. We describe the utility of three-dimensional (3D) printed models for complex patients to individualize care. DESCRIPTION: Oral effervescent agents, with positive enteric contrast, distended the esophagus during computed tomography (CT) scanning to facilitate segmentation during post-processing. The CT data were segmented, converted into a stereolithography file, and printed using photopolymer materials...
August 2015: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/26092611/role-of-computed-tomography-in-assessment-of-the-thoracic-aorta
#17
Nandini M Meyersohn, Khristine Ghemigian, Michael D Shapiro, Shimoli V Shah, Brian B Ghoshhajra, Maros Ferencik
Thoracic aortic disease is increasing in prevalence and can result in serious morbidity and mortality. Computed tomography (CT) angiography is an important imaging modality for assessment of thoracic aortic pathology due to wide availability, rapid acquisition, reproducibility, superior spatial and temporal resolution, and capability for 3D image post-processing. CT is the preferred imaging modality in the acute setting to rapidly identify patients with acute aortic syndromes including dissection, intramural hematoma, and penetrating aortic ulcer...
August 2015: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/26021528/renal-outcomes-following-fenestrated-and-branched-endografting
#18
T Martin-Gonzalez, C Pinçon, B Maurel, A Hertault, J Sobocinski, R Spear, M Le Roux, R Azzaoui, T M Mastracci, S Haulon
OBJECTIVE: The purpose of this study was to analyze immediate and long-term renal outcomes (renal function and renal events) after fenestrated (FEVAR) and branched endovascular aortic aneurysm repair (BEVAR). METHODS: All FEVAR and BEVAR performed between October 2004 and October 2012 were included in this study. Post-operative acute renal failure (ARF) was defined according to the RIFLE criteria. Renal volume (calculated with a 3D workstation) and estimated glomerular filtration rate (GFR) (estimated with the Modification of Diet in Renal Disease [MDRD] formula) were evaluated before the procedure, before discharge, 12 months after, and yearly thereafter...
October 2015: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/26014364/computational-analysis-of-the-mechanical-behaviors-of-hemiarch-and-total-arch-replacements
#19
Kuo-Sheng Liu, Cheng-Hung Lee, Feng-Chun Tsai, Guan-Heng Jhong, Kuo-Chun Hung, Shih-Jung Liu
Surgery for aortic dissections or aneurysms can be extended into the aortic arch by hemiarch replacement (HAR) or total arch replacement (TAR). Although cardiovascular surgeons have been performing HAR and TAR for decades, the mechanical properties of HAR and TAR are not well understood. This study investigates the mechanical behaviors and stress distributions in HAR and TAR using a hybrid fluid-structure interaction analysis that combines computational fluid dynamics and structural static analysis. Geometrical information on the aortas of 11 subjects was extracted from contrast-enhanced computed tomography (CT) scan data...
December 2015: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/26005802/increased-aortic-tortuosity-indicates-a-more-severe-aortic-phenotype-in-adults-with-marfan-syndrome
#20
RANDOMIZED CONTROLLED TRIAL
Romy Franken, Abdelali El Morabit, Vivian de Waard, Janneke Timmermans, Arthur J Scholte, Maarten P van den Berg, Henk Marquering, Nils R N Planken, Aeilko H Zwinderman, Barbara J M Mulder, Maarten Groenink
BACKGROUND: Patients with Marfan syndrome (MFS) have a highly variable occurrence of aortic complications. Aortic tortuosity is often present in MFS and may help to identify patients at risk for aortic complications. METHODS: 3D-visualization of the total aorta by MR imaging was performed in 211 adult MFS patients (28% with prior aortic root replacement) and 20 controls. A method to assess aortic tortuosity (aortic tortuosity index: ATI) was developed and reproducibility was tested...
September 1, 2015: International Journal of Cardiology
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