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https://www.readbyqxmd.com/read/28446225/the-crosstalk-between-vascular-mscs-and-inflammatory-mediators-determines-the-pro-calcific-remodelling-of-human-atherosclerotic-aneurysm
#1
Carmen Ciavarella, Enrico Gallitto, Francesca Ricci, Marina Buzzi, Andrea Stella, Gianandrea Pasquinelli
BACKGROUND: Human mesenchymal stem cells (MSCs) possess well-known reparative abilities, but any defect of the immunomodulatory activity and/or the differentiation process may determine the development of human diseases, including those affecting the vascular wall. MSCs residing within the human aortic wall represent a potential cell mediator of atherosclerotic aneurysm development. METHODS: MSCs isolated from healthy and aneurysm aortas were characterized by flow cytometer and tested for differentiation properties...
April 26, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28444201/mitral-periprosthetic-leakage-contemporary-results-of-surgical-correction-at-a-single-centre%C3%A2
#2
Luca Botta, Benedetta De Chiara, Salvina Quattrocchi, Francesca Casadei, Francesco Borgia, Cristina Giannattasio, Antonella Moreo, Claudio Francesco Russo
OBJECTIVES: Mitral periprosthetic leakage (PPL) is a serious complication following valve replacement. Conflicting outcomes of surgical treatment have been reported in the presence of multiple previous cardiac operations and associated co-pathological conditions. METHODS: Sixty-five symptomatic patients (37 women, mean age 64.8 years) underwent conventional operations at our hospital from 2006 to 2015. Mitral PPL was the leading surgical indication, although associated procedures were included...
April 21, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28439427/double-aorta-artifact-in-sonography-a-diagnostic-challenge
#3
REVIEW
Robert Hadzik, Przemysław Bombiński, Michał Brzewski
The double aorta artifact was described and studied thoroughly twenty-five years ago. Despite this, it is still not commonly known today and can cause diagnostic difficulty. Total aortic duplication can be considered an anatomic defect whilst partial duplication mimics aortic dissection. In the literature, this artifact has been compared with a very rare anomaly, i.e. the occurrence of two aortas in one patient. Currently, however, the differentiation of this artifact from abdominal aortic dissection seems to be of greater significance...
March 2017: Journal of Ultrasonography
https://www.readbyqxmd.com/read/28433350/open-repair-of-chronic-thoracic-and-thoracoabdominal-aortic-dissection-using-deep-hypothermia-and-circulatory-arrest
#4
Joel Corvera, Hannah Copeland, David Blitzer, Adam Hicks, Joshua Manghelli, Philip Hess, John Fehrenbacher
BACKGROUND: Chronic dissection of the thoracic and thoracoabdominal aorta as sequela of a prior type A or B dissection is a challenging problem that requires close radiographic surveillance and prompt operative intervention in the presence of symptoms or aneurysm formation. Open repair of chronic thoracic and thoracoabdominal aortic dissection using deep hypothermia has been our preferred method to treat this complex pathology. The advantages of this technique include organ and spinal cord protection, the flexibility to extend the repair proximally into the arch, and the ability to limit ischemia to all vascular beds...
March 18, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28426781/tauroursodeoxycholic-acid-tudca-attenuates-pressure-overload-induced-cardiac-remodeling-by-reducing-endoplasmic-reticulum-stress
#5
Shilpa Rani, Pradeep Kumar Sreenivasaiah, Jin Ock Kim, Mi Young Lee, Wan Seok Kang, Yong Sook Kim, Youngkeun Ahn, Woo Jin Park, Chunghee Cho, Do Han Kim
Pressure overload in the heart induces pathological hypertrophy and is associated with cardiac dysfunction. Apoptosis and fibrosis signaling initiated by the endoplasmic reticulum stress (ERS) is known to contribute to these maladaptive effects. The aim of this study was to investigate whether reduction of ERS by a known chemical chaperone, tauroursodeoxycholic acid (TUDCA) can attenuate pressure overload-induced cardiac remodeling in a mouse model of transverse aortic constriction (TAC). Oral administration of TUDCA at a dose of 300 mg/kg body weight (BW) in the TUDCA-TAC group reduced ERS markers (GRP78, p-PERK, and p-eIf2α), compared to the Vehicle (Veh)-TAC group...
2017: PloS One
https://www.readbyqxmd.com/read/28425970/aneurysm-specific-mir-221-and-mir-146a-participates-in-human-thoracic-and-abdominal-aortic-aneurysms
#6
Premakumari Venkatesh, Julie Phillippi, Sasanka Chukkapalli, Mercedes Rivera-Kweh, Irina Velsko, Thomas Gleason, Paul VanRyzin, Seyed Hossein Aalaei-Andabili, Ravi Kiran Ghanta, Thomas Beaver, Edward Kar Leung Chan, Lakshmyya Kesavalu
Altered microRNA expression is implicated in cardiovascular diseases. Our objective was to determine microRNA signatures in thoracic aortic aneurysms (TAAs) and abdominal aortic aneurysms (AAAs) compared with control non-aneurysmal aortic specimens. We evaluated the expression of fifteen selected microRNA in human TAA and AAA operative specimens compared to controls. We observed significant upregulation of miR-221 and downregulation of miR-1 and -133 in TAA specimens. In contrast, upregulation of miR-146a and downregulation of miR-145 and -331-3p were found only for AAA specimens...
April 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28425492/fluorescence-and-bioluminescence-imaging-of-angiogenesis-in-flk1-nano-lantern-transgenic-mice
#7
Jun Matsushita, Shigenori Inagaki, Tomomi Nishie, Tomoki Sakasai, Junko Tanaka, Chisato Watanabe, Ken-Ichi Mizutani, Yoshihiro Miwa, Ken Matsumoto, Kazuhiro Takara, Hisamichi Naito, Hiroyasu Kidoya, Nobuyuki Takakura, Takeharu Nagai, Satoru Takahashi, Masatsugu Ema
Angiogenesis is important for normal development as well as for tumour growth. However, the molecular and cellular mechanisms underlying angiogenesis are not fully understood, partly because of the lack of a good animal model for imaging. Here, we report the generation of a novel transgenic (Tg) mouse that expresses a bioluminescent reporter protein, Nano-lantern, under the control of Fetal liver kinase 1 (Flk1). Flk1-Nano-lantern BAC Tg mice recapitulated endogenous Flk1 expression in endothelial cells and lymphatic endothelial cells during development and tumour growth...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28424443/case-report-of-a-rarely-seen-long-segment-middle-aortic-syndrome
#8
Kahraman Yakut, İlkay Erdoğan
Middle aortic syndrome (MAS) follows a course with distal thoracic and abdominal aorta stenosis. It is a rare disease that is usually diagnosed after the first decade of life. Clinical reflection of MAS is often in the form of hypertension and claudication in the lower extremities. Its etiology is unclear, but is known to be associated with congenital or acquired diseases. This pathology, which is accompanied by malignant hypertension, often does not respond to medical treatment. In patients with MAS, surgical treatment is first line recommendation to prevent complications such as hypertension, heart failure, intracranial bleeding, or aortic rupture...
March 2017: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/28422344/use-of-blood-pool-agents-with-steady-state-mri-to-assess-the-vascular-system
#9
Avnesh S Thakor, John Chung, Premal Patel, Anthony Chan, Amdad Ahmed, Graeme McNeil, David M Liu, Bruce Forster, Darren Klass
Over the past two decades there have been significant advances in the use of magnetic resonance imaging (MRI) to assess the vascular system. New imaging sequences and improvements in magnet design have enabled the creation of higher spatial resolution images. MRI is now a viable alternative imaging modality when compared to both invasive angiography and computed tomographic angiography. The use of blood pool agents has further facilitated the use of MR angiography (MRA); their high molecular weight allows for lower doses of contrast medium administration while their prolonged presence in the blood stream allows for repeated high-quality volumetric imaging of both the arterial and venous circulation...
April 19, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28420460/-bone-marrow-mesenchymal-stem-cells-modulated-the-inflammatory-response-by-regulating-the-expression-of-il-4-and-rage-products-in-the-rats-with-mods
#10
Xia Zhou, Guanghui Xiu, Yichao Zhu, Xiaolei Chen, Wei Xiong, Xinghua Pan, Jie Sun, Bin Ling
OBJECTIVE: To investigate the underlying mechanism of bone marrow mesenchymal stem cells (BMSC) modulating the inflammatory response during the multiple organ dysfunction syndrome (MODS), especially the expression of inflammatory cytokines, which will provide new theoretical and experimental basis of MODS in clinic. METHODS: BMSC of Sprague-Dawley (SD) rat (female, 4 weeks) was extracted and cultivated, and the 4th passage were used in experimental study. According to the random number table, 60 female SD rats were divided into three groups (n = 20 per group): sham group, MODS group, BMSC group...
April 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28416358/non-gated-high-pitch-computed-tomography-aortic-angiography-myocardial-perfusion-defects-in-patients-with-suspected-aortic-dissection
#11
Li-Ting Huang, Shih-Hung Chan, Chia-Chang Chuang, Yi-Shan Tsai
OBJECTIVES: To investigate the diagnostic value of first-pass myocardial perfusion defects visualised in non-gated high-pitch computed tomography angiography (CTA) in patients admitted to the emergency department (ED) for suspected aortic dissection. METHODS: We recruited 174 ED patients who underwent high-pitch CTA of the aorta because of suspected aortic dissection. We divided these patients into two groups (diseased and control groups) based on whether their clinical data fulfilled the third universal definition of acute myocardial infarction (AMI), specifically an increase in cardiac troponin (cTn) with at least one of the following: (a) symptoms of ischemia; (b) new ST-segment-T wave (ST-T) changes or new left bundle branch block (LBBB); (c) development of pathological Q wave; (d) new loss of viable myocardium or new regional wall motion abnormality; or (e) identification of an intracoronary thrombus by angiography or autopsy...
April 12, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28415122/p1138cardiac-shear-wave-velocity-in-healthy-individuals
#12
M Strachinaru, M L Geleijnse, J G Bosch, N De Jong, Afw Van Der Steen, B M Van Dalen, H J Vos
Background: The closure of the valves generates shear waves in the heart walls. The propagation velocity of shear waves relates to stiffness. This could potentially be used to estimate the stiffness of the myocardium, with huge potential implications in pathologies characterized by a deterioration of the diastolic properties of the left ventricle. In an earlier phantom study we already validated shear wave tracking with a clinical ultrasound system in cardiac mode. Purpose: In this study we aimed to measure the shear waves velocity in normal individuals...
December 1, 2016: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28414676/pheochromocytoma-of-the-organ-zuckerkandl
#13
C Lee, E Chang, J Gimenez, R McCarron
INTRODUCTION: Pheochromocytomas (PCCs);, or intra-adrenal paragangliomas (PGLs);, are neuroendocrine tumors arising within the adrenal medulla. Extra-adrenal paragangliomas may arise in the sympathetic or parasympathetic paraganglia and more rarely in other organs. One of the most common extra-adrenal sites is in the organ of Zuckerkandl, a collection of chromaffin cells near the origin of the inferior mesenteric artery or near the aortic bifurcation. The following is a case of a patient with resistant hypertension secondary to an extra-adrenal paraganglioma in the organ of Zuckerkandl...
March 2017: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
https://www.readbyqxmd.com/read/28411526/endovascular-repair-of-a-ruptured-thoracic-aortic-dissection-with-a-right-sided-aortic-arch-a-case-report
#14
Jeremy L Irvan, James R Elmore, Sarah L Flora, Evan J Ryer
BACKGROUND: Emergency treatment of complex aortic pathology is challenging in the setting of a right-sided aortic arch. We report the successful treatment of a ruptured thoracic aortic aneurysm (TAA) in the setting of a Stanford type B aortic dissection (TBAD) and right-sided aortic arch. PRESENTATION OF CASE: The patient is a 66-year-old male with chronic kidney disease (CKD) admitted with right sided chest pain and hypotension. Computed tomography angiography (CTA) revealed a 5cm ruptured TAA in the setting of a TBAD and right-sided aortic arch...
2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28407120/biological-versus-mechanical-bentall-procedure-for-aortic-root-replacement-a-propensity-score-analysis-of-a-consecutive-series-of-1112-patients%C3%A2
#15
Antonio Pantaleo, Giacomo Murana, Luca Di Marco, Giuliano Jafrancesco, Giuseppe Barberio, Paolo Berretta, Alessandro Leone, Roberto Di Bartolomeo, Davide Pacini
OBJECTIVES: In this study, a propensity-matching analysis was used to compare biological versus mechanical composite valve graft implantation for early mortality and morbidities and for late complications including the need for aortic reintervention. METHODS: Between 1978 and 2011, 1112 consecutive patients underwent a complete aortic root replacement using either a biological Bentall (BB, n  = 356) or a mechanical Bentall (MB, n  = 756) valve conduit. Preoperative data were stratified according to the type of valve graft, and treatment bias was addressed by propensity score analysis...
April 11, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28406184/monocytes-and-macrophages-in-abdominal-aortic-aneurysm
#16
REVIEW
Juliette Raffort, Fabien Lareyre, Marc Clément, Réda Hassen-Khodja, Giulia Chinetti, Ziad Mallat
Abdominal aortic aneurysm (AAA) is a life-threatening disease associated with high morbidity, and high mortality in the event of aortic rupture. Major advances in open surgical and endovascular repair of AAA have been achieved during the past 2 decades. However, drug-based therapies are still lacking, highlighting a real need for better understanding of the molecular and cellular mechanisms involved in AAA formation and progression. The main pathological features of AAA include extracellular matrix remodelling associated with degeneration and loss of vascular smooth muscle cells and accumulation and activation of inflammatory cells...
April 13, 2017: Nature Reviews. Cardiology
https://www.readbyqxmd.com/read/28398529/long-term-results-of-modified-sandwich-repair-of-aortic-root-in-151-patients-with-acute-type-a-aortic-dissection
#17
Yangfeng Tang, Zilin Liao, Lin Han, Hao Tang, Zhigang Song, Zhiyun Xu
OBJECTIVES: Acute type A aortic dissection frequently induces aortic root disease; however, the optimal surgical strategy for aortic root dissection remains a challenge. The objective of this study was to introduce a novel technique for reconstruction of type A dissection to improve patient prognosis. METHODS: We performed a retrospective review of 791 consecutive patients with acute type A aortic dissection between January 2003 and July 2015. Among these patients, 151 were selected (72% men, age 51...
April 6, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28398494/impact-of-lymph-node-dissection-on-clinical-outcomes-during-nephroureterectomy-in-patients-with-clinically-node-negative-upper-urinary-tract-urothelial-cancer-subanalysis-of-a-multi-institutional-nationwide-case-series-of-the-japanese-urological-association
#18
Junichi Inokuchi, Masatoshi Eto, Tomohiko Hara, Hiroyuki Fujimoto, Hiroyuki Nishiyama, Jun Miyazaki, Eiji Kikuchi, Shiro Hinotsu, Takuya Koie, Chikara Ohyama
Objective: To evaluate the impact of lymph node dissection (LND) on the clinical outcomes during radical nephroureterectomy (RNU) in patients with clinically node-negative upper urinary tract urothelial cancer (UTUC). Methods: Within the nationwide case series of the Japanese Urological Association, which comprises 1509 patients with UTUC diagnosed in 2005, we identified 823 patients with clinically node-negative UTUC who underwent RNU. The extent of limited LND was defined as the renal hilar region only for renal pelvic cancer and as either the pelvic region or para-aortic/paracaval region only for ureteral cancer, while the extent of wider LND was defined as at least one perilesional LND region in addition to limited LND...
April 7, 2017: Japanese Journal of Clinical Oncology
https://www.readbyqxmd.com/read/28395872/outcomes-of-antegrade-stent-graft-deployment-during-hybrid-aortic-arch-repair
#19
Seyed Hossein Aalaei-Andabili, Salvatore Scali, Charles Klodell, Teng Lee, Philip Hess, Tomas Martin, Adam Beck, Robert Feezor, Mahmoud Alhussaini, George Arnaoutakis, Thomas Beaver
BACKGROUND: Complex aortic arch disease can be a formidable challenge and is often treated with a two-stage elephant trunk technique. We examined our experience with hybrid arch repair with combined zone 0 stent graft deployment. METHODS: A retrospective review was conducted of all patients who underwent type 2 hybrid arch replacement and zone 0 antegrade endovascular stent graft deployments at a single university center from June 2010 to August 2015. RESULTS: The review included 48 patients, 25 (52%) elective and 23 (48%) nonelective, with a mean ± SD age of 64 ± 11 years...
April 7, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28394759/combined-mitro-aortic-pathology-impact-of-previous-aortic-valve-replacement-upon-outcomes-of-mitra-clip-therapy
#20
Giuseppe D'Ancona, Stephan Kische, Jochen Senges, Taoufik Ouarrak, Miriam Puls, Raffi Bekeredjian, Horst Sievert, Erdal Safak, Jasmin Ortak, Alper Öner, Wolfgang Schillinger, Hüseyin Ince
AIMS: To identify the impact of previous aortic valve replacement (AVR) in Mitra-Clip (MC) patients. METHODS AND RESULTS: Data from the German Transcatheter Mitral Valve Interventions (TRAMI) registry were analyzed in light of previous AVR by means of either standard AVR (SAVR) or transcatheter AVR (TAVR). Out of 791 MC, 68 (8.6%) had been submitted to AVR (68.4% SAVR and 31.6% TAVR). AVR group was significantly older (77.2±8.0 years vs. 75.1±8.6 years; p<0...
April 11, 2017: EuroIntervention
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