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3D aortic dissection

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https://www.readbyqxmd.com/read/28336939/locating-the-human-cardiac-conduction-system-using-a-3d-model-of-its-nutritious-arteries
#1
Yu Xu, Yukun Peng, Rongmei Qu, Guorong Zheng, Feiyan Feng, Yan Feng, Linying He, Shanli He, Zeyu Li, Chang Liu, Zhaoming Xiao, Jun Ouyang, Jingxing Dai
It is difficult for anatomists to dissect the human cardiac conduction system (CCS) on specimens as well as for cardiovascular clinicians to locate the CCS during cardiac operations. Here, we demonstrate a new method for locating the CCS using a 3D model of its nutritious arteries. First, we perfused the coronary arteries with contrast material and then acquired a set of data of thin computer tomography (CT) scans. Then, we generated a 3D model of the coronary artery and distinguished the arteries that supply the CCS...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28329082/aortic-elongation-and-the-risk-for-dissection-the-t%C3%A3-bingen-aortic-pathoanatomy-taipan-project%C3%A2
#2
Tobias Krüger, Alexandre Oikonomou, David Schibilsky, Mario Lescan, Katharina Bregel, Luise Vöhringer, Wilke Schneider, Henning Lausberg, Gunnar Blumenstock, Fabian Bamberg, Christian Schlensak
OBJECTIVES: We measured aortic dimensions, particularly length parameters, using 3D imaging with the aim of refining the risk-morphology for Stanford type A aortic dissection (TAD). METHODS: Computer tomography angiography studies were analysed using the curved multiplanar reformats. At defined landmarks, the diameters and lengths of aortic segments were recorded. Three groups were compared retrospectively: patients actually suffering from a TAD (TAD-group; n  = 150), patients before suffering a TAD (preTAD-group n  = 15) and a healthy control group ( n  = 215)...
February 16, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28327193/longitudinal-evaluation-of-aortic-hemodynamics-in-marfan-syndrome-new-insights-from-a-4d-flow-cardiovascular-magnetic-resonance-multi-year-follow-up-study
#3
Julia Geiger, Daniel Hirtler, Kristina Gottfried, Ozair Rahman, Emilie Bollache, Alex J Barker, Michael Markl, Brigitte Stiller
BACKGROUND: The aim of this 4D flow cardiovascular magnetic resonance (CMR) follow-up study was to investigate longitudinal changes in aortic hemodynamics in adolescent patients with Marfan syndrome (MFS). METHODS: 4D flow CMR for the assessment of in-vivo 3D blood flow with full coverage of the thoracic aorta was performed twice (baseline scan t1/follow-up scan t2) in 19 adolescent MFS patients (age at t1: 12.7 ± 3.6 years, t2: 16.2 ± 4.3 years) with a mean follow-up duration of 3...
March 22, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28302143/altered-aortic-3d-hemodynamics-and-geometry-in-pediatric-marfan-syndrome-patients
#4
Roel L F van der Palen, Alex J Barker, Emilie Bollache, Julio Garcia, Michael J Rose, Pim van Ooij, Luciana T Young, Arno A W Roest, Michael Markl, Joshua D Robinson, Cynthia K Rigsby
BACKGROUND: Blood flow dynamics make it possible to better understand the development of aortopathy and cardiovascular events in patients with Marfan syndrome (MFS). Aortic 3D blood flow characteristics were investigated in relation to aortic geometry in children and adolescents with MFS. METHODS: Twenty-five MFS patients (age 15.6 ± 4.0 years; 11 females) and 21 healthy controls (age 16.0 ± 2.6 years; 12 females) underwent magnetic resonance angiography and 4D flow CMR for assessment of thoracic aortic size and 3D blood flow velocities...
March 17, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28134482/modelling-of-aortic-aneurysm-and-aortic-dissection-through-3d-printing
#5
Daniel Ho, Andrew Squelch, Zhonghua Sun
INTRODUCTION: The aim of this study was to assess if the complex anatomy of aortic aneurysm and aortic dissection can be accurately reproduced from a contrast-enhanced computed tomography (CT) scan into a three-dimensional (3D) printed model. METHODS: Contrast-enhanced cardiac CT scans from two patients were post-processed and produced as 3D printed thoracic aorta models of aortic aneurysm and aortic dissection. The transverse diameter was measured at five anatomical landmarks for both models, compared across three stages: the original contrast-enhanced CT images, the stereolithography (STL) format computerised model prepared for 3D printing and the contrast-enhanced CT of the 3D printed model...
March 2017: Journal of Medical Radiation Sciences
https://www.readbyqxmd.com/read/28094152/use-of-3d-printer-technology-to-facilitate-surgical-correction-of-a-complex-vascular-anomaly-with-esophageal-entrapment-in-a-dog
#6
A Dundie, G Hayes, P Scrivani, L Campoy, D Fletcher, K Ash, E Oxford, N S Moïse
A 10 week old female intact Staffordshire terrier was presented with a total of five congenital cardio-thoracic vascular anomalies consisting of a patent ductus arteriosus (PDA) with an aneurysmic dilation, pulmonic stenosis, persistent right aortic arch, aberrant left subclavian artery and persistent left cranial vena cava. These abnormalities were identified with a combination of echocardiogram and computed tomography angiography (CTA). The abnormalities were associated with esophageal entrapment, regurgitation, and volume overload of the left heart with left atrial and ventricular enlargement...
January 13, 2017: Journal of Veterinary Cardiology: the Official Journal of the European Society of Veterinary Cardiology
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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
REVIEW
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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