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https://www.readbyqxmd.com/read/28743113/pulmonary-hypertension-in-a-large-cohort-with-hereditary-hemorrhagic-telangiectasia
#1
Veronique Vorselaars, Sebastiaan Velthuis, Marco van Gent, Cornelis Westermann, Repke Snijder, Johannes Mager, Martijn Post
BACKGROUND: Hereditary hemorrhagic telangiectasia (HHT) is a vascular disorder characterized by arteriovenous malformations in the brain, liver, and lungs. Pulmonary hypertension (PH) is increasingly recognized as a severe complication of HHT. However, there are no studies describing the prevalence of PH in HHT compared to HHT-negative controls. OBJECTIVE: To assess the estimated prevalence of PH in patients with HHT compared to HHT-negative controls. METHODS: All consecutive subjects screened for HHT with available genetic testing and echocardiography-based peak tricuspid regurgitation velocity (TRV) measurement were included...
July 26, 2017: Respiration; International Review of Thoracic Diseases
https://www.readbyqxmd.com/read/28741709/prenatal-diagnosis-of-dural-sinus-malformation-in-a-fetus-presenting-with-general-oedema
#2
Michal Lipa, Przemyslaw Kosinski, Ritsuko K Pooh, Miroslaw Wielgos
Dural sinus malformation (DSM) is an extremely rare, congenital dilatation of the dural sinus pouch. DSM cases associated with arteriovenous shunt (AV shunt) usually have a poor pregnancy outcome due to an excessive hemodynamic load and progressive cardiac failure.
July 25, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28741438/bilateral-arteriovenous-shunts-as-a-method-for-evaluating-tissue-engineered-vascular-grafts-in-large-animal-models
#3
Chin Siang Ong, Takuma Fukunishi, Rui Han Liu, Kevin Nelson, Huaitao Zhang, Elizabeth Wieczorek, McKenna Palmieri, Yukie Ueyama, Erin Ferris, Gail E Geist, Bradley L Youngblood, Jed Johnson, Narutoshi Hibino
There remains a need for large animal models to evaluate tissue engineered vascular grafts (TEVGs) under arterial pressure to provide preclinical data for future potential human clinical trials. We present a comprehensive method for the interrogation of TEVGs, using an ovine bilateral arteriovenous shunt implantation model. Our results demonstrate that this method can be performed safely without complications, specifically acute heart failure, steal syndrome, and hypoxic brain injury and is a viable experimental paradigm...
July 25, 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28740770/versatility-of-the-latissimus-dorsi-free-flap-during-the-treatment-of-complex-postcraniotomy-surgical-site-infections
#4
Nobutaka Yoshioka
BACKGROUND: Some intractable cases of postcraniotomy infection, which can involve compromised skin, an open frontal air sinus, and residual epidural dead space, have been reported. In such cases, reconstructing the scalp and skull is challenging. METHODS: Between 2009 and 2016, the author treated 12 patients with recalcitrant postcraniotomy surgical site infections with latissimus dorsi (LD) free flaps. The patients' ages ranged from 37 to 79 years (mean, 63.5 years), and their underlying diseases included subarachnoid hemorrhaging (n = 5), brain tumors (n = 4), and cerebral arteriovenous malformations (n = 3)...
June 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28740448/evaluation-of-brain-edema-formation-defined-by-mri-after-linac-based-stereotactic-radiosurgery
#5
Maciej Harat, Andrzej Lebioda, Judyta Lasota, Roman Makarewicz
BACKGROUND: Peri-lesional edema is a serious and well-known complication of stereotactic radiosurgery (SRS). Here we evaluated edema risk after SRS and assessed its formation and resolution dynamics. PATIENTS AND METHODS: 107 patients underwent SRS for heterogeneous diagnoses: 34 (29%) with arteriovenous malformations, 38 (35%) with meningiomas, 16 (15%) with metastatic tumors, 16 (15%) with acoustic neuromas, 3 with (3%) cavernomas, and 2 (2%) each with anaplastic astrocytomas and anaplastic oligoastrocytomas...
June 2017: Radiology and Oncology
https://www.readbyqxmd.com/read/28739575/fda-regulatory-perspectives-for-studies-on-hemodialysis-vascular-access
#6
Frank P Hurst, Robert E Lee, Aliza M Thompson, Brian D Pullin, Douglas M Silverstein
In an effort to foster innovation and new product development, the American Society of Nephrology and the US Food and Drug Administration partnered to form the Kidney Health Initiative in 2012. Part of the Kidney Health Initiative's mission is to foster development of therapies by creating a collaborative environment where the US Food and Drug Administration and the greater nephrology community can interact to optimize product evaluation. This particular Kidney Health Initiative project focused on products related to hemodialysis vascular access, with the goal of clarifying appropriate trial end points that could subsequently inform clinical, regulatory, and coverage decisions...
July 24, 2017: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/28739568/posterior-meningeal-artery-dmso-injection-resulting-in-reproducible-asystole-prior-to-onyx-therapy-of-a-dural-arteriovenous-fistula-a-previously-undescribed-variant-of-the-trigeminocardiac-reflex-or-a-new-phenomenon
#7
Matthew Thomas Crockett, Anthony Ernest Robinson, Harmeet Aneja, Timothy John Phillips
We describe a case of reproducible asystole during endovascular treatment of a posterior fossa dural arteriovenous fistula. Catheterisation of the posterior meningeal artery, a branch of the vertebral artery in this patient, followed by dimethyl sulfoxide injection prior to Onyx administration resulted in two episodes of asystole.To the best of our knowledge, this is the first reported case of asystole occurring during endovascular intervention in the posterior meningeal artery. This may represent a previously undescribed variant of the trigemino-cardiac reflex (TGCR) caused by chemical stimulation of small areas of trigeminally innervated posterior fossa dura...
July 24, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28739465/endovascular-treatment-of-a-reno-caval-arteriovenous-fistula-induced-inferior-vena-cava-aneurysm
#8
Timme M A J van Vuuren, Ralph L M Kurstjens, Carina Van Zandvoort, Rick De Graaf, Cees H A Wittens, Jorinde H H Van Laanen
No abstract text is available yet for this article.
July 21, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28739360/type-iii-spinal-cord-arteriovenous-malformation-with-good-postsurgical-outcome
#9
Kabelo Thusang, Keisuke Ueda, Rajkumar Agarwal
No abstract text is available yet for this article.
May 31, 2017: Pediatric Neurology
https://www.readbyqxmd.com/read/28738446/single-stage-versus-two-stage-arteriovenous-loop-microsurgical-reconstruction-a-meta-analysis-of-the-literature
#10
REVIEW
Rebecca Knackstedt, Rachel Aliotta, James Gatherwright, Risal Djohan, Brian Gastman, Graham Schwarz, Mark Hendrickson, Raffi Gurunluoglu
BACKGROUND: Arteriovenous (AV) loops can be utilized in a single- or two-stage approach in free flap reconstruction when proper vessels are not available. However, there exists no consensus on which method leads to superior microsurgical and patient outcomes. The purpose of this article was to review single- versus two-stage AV loops utilized in free flap reconstruction with a focus on complications and overall outcomes. METHODS: A systematic review of AV loops for autologous free tissue transfer was conducted...
July 24, 2017: Microsurgery
https://www.readbyqxmd.com/read/28737563/reverse-distal-transverse-palmar-arch-in-distal-digital-replantation
#11
Ching-Yueh Wei, Oscar Orozco, Gustavo Vinagre, Mark Shafarenko
BACKGROUND: Refinements in microsurgery have made distal finger replantation an established technique with high success rates and good functional and aesthetic outcomes. However, it still represents a technically demanding procedure due to the small vessel caliber and frequent lack of vessel length, requiring the use of interpositional venous grafts in some instances. We describe a new technique for anastomosis in fingertip replantation, whereby the need for venous grafts is eliminated...
July 22, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28736615/pulmonary-arteriovenous-malformations-complicated-by-splenic-infarction-and-abscess
#12
Jun Naito, Hajime Kasai, Masaki Suga, Toshihiko Sugiura, Nobuhiro Tanabe, Koichiro Tatsumi
Pulmonary arteriovenous malformation (PAVM) is an abnormal blood vessel connecting a pulmonary artery and a vein, and is accompanied by paradoxical embolism to other organs due to a right-to-left shunt. We report the case of a 66-year-old woman with PAVM complicated by splenic infarction and abscess. Although the PAVM had been detected on a chest image 2 years previously, and she had been advised to have further investigations, she decided not to follow this further at the time. She then visited our hospital complaining of worsening dyspnoea on exertion...
September 2017: Respirology Case Reports
https://www.readbyqxmd.com/read/28735438/adenosine-assisted-neurovascular-surgery-initial-case-series-and-review-of-literature
#13
REVIEW
Alaa Al-Mousa, Gahan Bose, Katharine Hunt, Ahmed K Toma
Cerebral aneurysms in complex anatomical locations and intraoperative rupture of aneurysms are challenging for neurosurgeons and anaesthetists alike. Mechanical and non-mechanical methods to reduce blood flow into aneurysms are well-recognised techniques to facilitate aneurysm exclusion from the circulation. Mechanical methods like temporary clipping of parent arteries, carotid artery ligation and endovascular balloon occlusion are commonly used in clinical practice. However, non-mechanical techniques such as rapid ventricular pacing and adenosine-induced cardiac standstill with hypotension are still emerging strategies...
July 22, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28735125/management-of-arteriovenous-malformations-associated-with-developmental-venous-anomalies-a-literature-review-and-report-of-two-cases
#14
Michael Zhang, Ian D Connolly, Mario K Teo, George Yang, Robert Dodd, Michael Marks, Mario Zuccarello, Gary K Steinberg
OBJECTIVE: Cerebrovascular malformation classification has revealed intermediary lesions that warrant further review due to their unusual presentation and management. We present two cases of arteriovenous malformations (AVMs) associated with a developmental venous anomaly (DVA), and discuss the efficacy of previously published management strategies. METHODS: Two cases of AVMs associated with DVA were identified and a literature search for published cases between 1980 and 2016 was conducted...
July 19, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28734812/quantitative-retinal-vascular-changes-in-obstructive-sleep-apnea
#15
Jessica Y Tong, Mojtaba Golzan, Dana Georgevsky, Jonathan P Williamson, Stuart L Graham, Claude S Farah, Clare L Fraser
PURPOSE: To examine the relationship between both static and dynamic retinal vascular caliber and the severity of obstructive sleep apnea (OSA). DESIGN: Prospective cross-sectional study. METHODS: Adult patients undergoing diagnostic polysomnography studies at a private Australian university teaching hospital were recruited. OSA severity was defined by the apnea-hypopnea index (AHI): severe >30, moderate >15-30, mild 5-15, and controls <5...
July 19, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28734621/use-of-n-butyl-cyanoacrylate-to-reduce-left-to-right-shunting-of-an-abdominal-arteriovenous-malformation-in-a-dog
#16
B D Eason, D F Hogan, C Lim, M J Hogan
A 9-month old castrated male Labradoodle presented to the cardiology service at Purdue University for evaluation of a low-grade murmur. Physical examination, thoracic radiography, and echocardiography were strongly supportive of an extracardiac left-to-right shunt. Subsequent evaluation with nuclear scintigraphy and computed tomography angiography revealed a large, complex arteriovenous malformation within the cranial abdomen. Staged interventional attenuation of the shunt was performed using n-butyl cyanoacrylate that resulted in a reduction in echocardiographic and nuclear scintigraphy derived shunt estimation...
July 19, 2017: Journal of Veterinary Cardiology: the Official Journal of the European Society of Veterinary Cardiology
https://www.readbyqxmd.com/read/28734444/systemic-artery-to-pulmonary-vein-fistula-after-right-upper-lobectomy-demonstrated-by-4-dimensional-flow-magnetic-resonance-imaging
#17
Antoine Legras, Arshid Azarine, Bastien Poitier, Emmanuel Messas, Françoise Le Pimpec-Barthes
Postoperative systemic artery to pulmonary vein fistula is very rare. In this report, we describe an exceptional condition of both intrapulmonary arteriovenous fistula and systemic artery to pulmonary vein fistula, involving all right hemithoracic systemic arteries, inducing left-to-left shunt. This condition was responsible for heart failure, 24 years after a right upper lobectomy for inflammatory tumor. Investigations included computed tomographic angiography, arteriography, and four-dimensional flow magnetic resonance imaging...
August 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28733739/variation-and-treatment-of-vessels-in-laparoscopic-right-hemicolectomy
#18
Kai Ye, Jianan Lin, Yafeng Sun, Yiyang Wu, Jianhua Xu, Songbing He
BACKGROUND: With the introduction of complete mesocolic excision (CME) and the application of laparoscopic technique, surgery for colon cancer has become more standardized and the curative effect has improved [1]. The key points in laparoscopic right hemicolectomy are high ligation of main vessels and root dissection of lymph nodes. The wide range of variations in vascular architecture and intraoperative bleeding are common causes of prolonged surgical time, wound hemorrhage, and even transfer to the opening operation...
July 21, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28733096/brachial-vein-transposition-is-a-promising-ultimate-upper-limb-autologous-arteriovenous-angioaccess-despite-its-many-pitfalls
#19
Lamisse Karam, Marek Rawa, Richard Shoenfeld, Pierre Bourquelot
OBJECTIVE: The objective of this study was to retrospectively evaluate the possibility of using the brachial veins despite their deep location, small caliber, and thin wall. METHODS: There were 64 patients without superficial veins who were eligible for two-stage brachial vein transposition (BrVT); 54 patients were on hemodialysis, 9 patients had sickle cell disease, and 1 patient had long-term parenteral nutrition. Preoperative imaging was performed with color duplex ultrasound as well as venography for suspected central vein stenosis...
July 18, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28732833/the-multiple-dimensions-of-platypnea-orthodeoxia-syndrome-a-review
#20
REVIEW
Abhinav Agrawal, Atul Palkar, Arunabh Talwar
Platypnea-Orthodeoxia syndrome (POS) is a rare clinical entity characterized by dyspnea and arterial desaturation while in the upright position. The various pathophysiologic mechanisms leading to POS has puzzled clinicians for years. The hypoxia in POS has been attributed to the mixing of the deoxygenated venous blood with the oxygenated arterial blood via a shunt. The primary mechanisms of POS in these patients can be broadly classified based on intracardiac abnormalities, extracardiac abnormalities and miscellaneous etiologies...
August 2017: Respiratory Medicine
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