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https://www.readbyqxmd.com/read/28820296/long-term-hemodynamic-changes-and-blood-pressure-in-atherosclerotic-major-cerebral-artery-disease
#1
Hiroshi Yamauchi, Shinya Kagawa, Masaaki Takahashi, Tatsuya Higashi
In patients with major cerebral artery disease, lower blood pressure might reduce blood flow in the collateral pathways, thereby impairing the growth of cerebral collaterals, inhibiting hemodynamic improvement. We evaluated the hemodynamic status twice using positron emission tomography and (15)O-gas, over time, in 89 medically treated patients with atherosclerotic internal carotid artery or middle cerebral artery disease that had no ischemic episodes during follow-up (mean, 28 ± 23 months). Changes in the mean hemispheric values of hemodynamic parameters in the territory of the diseased artery at follow-up were correlated with the mean blood pressure values at the baseline and follow-up examinations...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28818219/contemporary-outcomes-after-venography-guided-treatment-of-patients-with-may-thurner-syndrome
#2
Johnathon C Rollo, Steven M Farley, Adam Z Oskowitz, Karen Woo, Brian G DeRubertis
OBJECTIVE: Patients with May-Thurner syndrome (MTS) present with a spectrum of findings ranging from mild left leg edema to extensive iliofemoral deep venous thrombosis (DVT). Whereas asymptomatic left common iliac vein (LCIV) compression can be seen in a high proportion of normal individuals on axial imaging, the percentage of these persons with symptomatic compression is small, and debate exists about the optimal clinical and diagnostic criteria to treat these lesions in patients with symptomatic venous disease...
September 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28815098/osteoblastic-metastases-mimickers-on-contrast-enhanced-ct
#3
Fahad Al-Lhedan, Sam Samaan, Wanzhen Zeng
Secondary osseous involvement in lymphoma is more common compared to primary bone lymphoma. The finding of osseous lesion can be incidentally discovered during the course of the disease. However, osseous metastases are infrequently silent. Detection of osseous metastases is crucial for accurate staging and optimal treatment planning of lymphoma. The aim of imaging is to identify the presence and extent of osseous disease and to assess for possible complications such as pathological fracture of the load-bearing bones and cord compression if the lesion is spinal...
2017: Case Reports in Radiology
https://www.readbyqxmd.com/read/28801174/the-cerebral-collateral-circulation-relevance-to-pathophysiology-and-treatment-of-stroke
#4
REVIEW
Myron D Ginsberg
The brain's collateral circulation consists of arterial anastomotic channels capable of providing nutrient perfusion to brain regions whose normal sources of flow have become compromised, as occurs in acute ischemic stroke. Modern CT-based neuroimaging is capable of providing detailed information as to collateral extent and sufficiency and is complemented by magnetic resonance-based methods. In the present era of standard-of-care IV thrombolysis for acute ischemic stroke, and following the recent therapeutic successes of randomized clinical trials of acute endovascular intervention, the sufficiency of the collateral circulation has been convincingly established as a key factor influencing the likelihood of successful reperfusion and favorable clinical outcome...
August 8, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28798219/improved-detection-of-anterior-circulation-occlusions-the-delayed-vessel-sign-on-multiphase-ct-angiography
#5
D Byrne, G Sugrue, E Stanley, J P Walsh, S Murphy, E C Kavanagh, P J MacMahon
BACKGROUND AND PURPOSE: Multiphase CTA, a technique to dynamically assess the vasculature in acute ischemic stroke, was primarily developed to evaluate collateral filling. We have observed that it is also useful in identifying distal anterior circulation occlusions due to delayed anterior circulation opacification on multiphase CTA, an observation we term the "delayed vessel sign." We aimed to determine the usefulness of this sign by comparing multiphase CTA with single-phase CTA. MATERIALS AND METHODS: All 23 distal anterior circulation occlusions during a 2-year period were included...
August 10, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28797424/retrograde-chronic-total-occlusion-percutaneous-coronary-intervention-through-ipsilateral-collateral-channels-a-multicenter-registry
#6
Lorenzo Azzalini, Pierfrancesco Agostoni, Susanna Benincasa, Paul Knaapen, Stefan P Schumacher, Joseph Dens, Joren Maeremans, Adriaan O Kraaijeveld, Leo Timmers, Michael Behnes, Ibrahim Akin, Aurel Toma, Franz-Josef Neumann, Antonio Colombo, Mauro Carlino, Kambis Mashayekhi
OBJECTIVES: The aim of this study was to describe the procedural aspects and outcomes of retrograde chronic total occlusion (CTO) percutaneous coronary intervention (PCI) through ipsilateral collateral channels (ILCs). BACKGROUND: Retrograde CTO PCI via ILCs is rarely performed, usually when no other retrograde options exist, and available evidence derives mostly from case reports. METHODS: A large retrospective multinational registry was compiled, including all consecutive patients undergoing retrograde CTO PCI through ILCs at 6 centers between September 2011 and October 2016...
August 14, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28790213/-surgical-treatment-of-cervical-carotid-artery-aneurysm
#7
Ryo Hamasaki, Toshiharu Yanagisawa, Yusuke Takahashi, Hiroaki Shimizu
Cervical carotid aneurysms are rare, and surgical treatment should be planned for each patient. The authors report 9 cases of cervical carotid aneurysm in 9 patients(mean age, 53.7 years;5 men)who were treated surgically between 2005 and 2014. The aneurysm was located in the internal carotid artery in 6 patients, the common carotid artery in 2 patients, and the carotid bifurcation in 1 patient. Four aneurysms were recurrences after a previous endovascular intervention(parent artery coil embolization, covered stent placement, or stent with coil embolization)...
August 2017: No Shinkei Geka. Neurological Surgery
https://www.readbyqxmd.com/read/28783102/the-pulmonary-circulation-in-the-single-ventricle-patient
#8
REVIEW
Amanda Hauck, Nicolas Porta, Steven Lestrud, Stuart Berger
In recent decades, survival of children with complex congenital heart disease has improved considerably. Specifically, children with a variety of congenital heart defects resulting in 'single ventricle' physiology can now undergo palliative surgery that allows survival beyond the neonatal period, and in many cases into adulthood, despite having a single functional ventricular pumping chamber supplying both the pulmonary and systemic circulation. Our growing understanding of the functionally univentricular heart has resulted in freedom from Fontan failure of >50% at 25 years post-Fontan...
August 7, 2017: Children
https://www.readbyqxmd.com/read/28780251/convexity-subarachnoid-hemorrhage-due-to-cardioembolic-stroke-in-a-woman-with-thyrotoxicosis-%C3%AE-case-report
#9
Ioanna Spanou, Sophia Vassilopoulou, Eleni Koroboki, Argyro Tountopoulou, Georgios Velonakis, Dimos Dimitrios Mitsikostas
BACKGROUND: Non-traumatic convexity subarachnoid hemorrhage (cSAH) is a rarely reported condition with a wide spectrum of etiologies. Cerebral ischemia secondary to extracranial or intracranial atherosclerotic disease has been identified as a relatively uncommon cause of cSAH. CASE REPORT: We report a case of cSAH caused by cardioembolic stroke. A 69-year old female patient developed suddenly left-sided face and body weakness and numbness and visual neglect on the left...
August 2, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28776469/relationship-between-haemodynamic-impairment-and-collateral-blood-flow-in-carotid-artery-disease
#10
Nolan S Hartkamp, Esben T Petersen, Michael A Chappell, Thomas W Okell, Maarten Uyttenboogaart, Clark J Zeebregts, Reinoud Ph Bokkers
Collateral blood flow plays a pivotal role in steno-occlusive internal carotid artery (ICA) disease to prevent irreversible ischaemic damage. Our aim was to investigate the effect of carotid artery disease upon cerebral perfusion and cerebrovascular reactivity and whether haemodynamic impairment is influenced at brain tissue level by the existence of primary and/or secondary collateral. Eighty-eight patients with steno-occlusive ICA disease and 29 healthy controls underwent MR examination. The presence of collaterals was determined with time-of-flight, two-dimensional phase contrast MRA and territorial arterial spin labeling (ASL) imaging...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28776069/porcine-arteriogenesis-based-on-vasa-vasorum-in-a-novel-semi-acute-occlusion-model-using-high-resolution-imaging
#11
Jonathan M Harnoss, Florian Krackhardt, Zully Ritter, Susanne Granzow, Dieter Felsenberg, Konrad Neumann, Lilach O Lerman, Fabian Riediger, Philipp Hillmeister, Peter Bramlage, Ivo R Buschmann
Bridging collaterals (BC) develop in several chronic total artery occlusion diseases, and can prevent extensive myocardial necrosis. Yet, their origin, growth process, and histo-morphology are still unclear. Since vasa vasorum (VV) may take part in collateralization, we hypothesized that VV are the basis for BCs. To comprehensively investigate this arteriogenesis process, we used high-resolution imaging, including corrosion casts, post-mortem angiography with stereoscopy, micro-CT, and immunohistology, in combination with a novel semi-acute vessel occlusion model...
August 3, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28775139/permeability-surface-of-deep-middle-cerebral-artery-territory-on-computed-tomographic-perfusion-predicts-hemorrhagic-transformation-after-stroke
#12
Qiao Li, Xinyi Gao, Zhenwei Yao, Xiaoyuan Feng, Huijin He, Jing Xue, Peiyi Gao, Lumeng Yang, Xin Cheng, Weijian Chen, Yunjun Yang
BACKGROUND AND PURPOSE: Permeability surface (PS) on computed tomographic perfusion reflects blood-brain barrier permeability and is related to hemorrhagic transformation (HT). HT of deep middle cerebral artery (MCA) territory can occur after recanalization of proximal large-vessel occlusion. We aimed to determine the relationship between HT and PS of deep MCA territory. METHODS: We retrospectively reviewed 70 consecutive acute ischemic stroke patients presenting with occlusion of the distal internal carotid artery or M1 segment of the MCA...
August 3, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28775102/life-threatening-airway-bleeding-after-palliation-of-single-ventricle-congenital-heart-disease
#13
Konstantin Averin, Jonathan W Byrnes, Dan T Benscoter, Wendy Whiteside, Holly DeSena, Russel Hirsch, Bryan H Goldstein
OBJECTIVE: To describe acute and mid-term outcomes following presentation with, and treatment for, life-threatening airway bleeding (hemoptysis) in palliated single ventricle congenital heart disease (SV-CHD). METHODS: Case series of patients with SV-CHD who presented to a large congenital heart centre with hemoptysis between 2004 and 2015. RESULTS: Twenty-one episodes of hemoptysis occurred in 12 patients (58% female, median 10.5 (IQR 7.2, 16...
August 3, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28767569/visual-loss-due-to-optic-nerve-infarction-and-central-retinal-artery-occlusion-after-spine-surgery-in-the-prone-position-a-case-report
#14
Soo Hee Lee, Inyoung Chung, Dae Seob Choi, Il-Woo Shin, Sunmin Kim, Sebin Kang, Ji-Yoon Kim, Young-Kyun Chung, Ju-Tae Sohn
RATIONALE: Visual loss after spine surgery in the prone position is a serious complication. Several cases of central retinal artery occlusion with ophthalmoplegia after spine surgery have been reported in patients with ophthalmic arteries fed by the internal carotid artery (ICA) in a normal manner. PATIENT CONCERNS: A 74-year-old man developed visual loss after undergoing a spinal decompression and fusion operation in the prone position that lasted approximately 5 hours...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28766271/rapid-liver-hypertrophy-after-portal-vein-occlusion-correlates-with-the-degree-of-collateralization-between-lobes-a-study-in-pigs
#15
Rebecca Deal, Charles Frederiks, Lauren Williams, Pim B Olthof, Konstantin Dirscherl, Xavier Keutgen, Edie Chan, Daniel Deziel, Martin Hertl, Erik Schadde
BACKGROUND: Associating liver partition and portal vein ligation for staged hepatectomy (ALPPS) induces more rapid liver growth than portal vein ligation (PVL). Transection of parenchyma in ALPPS may prevent the formation of collaterals between lobes. The aim of this study was to determine if abrogating the formation of collaterals through parenchymal transection impacted growth rate. METHODS: Twelve Yorkshire Landrace pigs were randomized to undergo ALPPS, PVL, or "partial ALPPS" by varying degrees of parenchymal transection...
August 1, 2017: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
https://www.readbyqxmd.com/read/28761192/outcome-of-prolonged-acute-vena-cava-occlusion-after-iatrogenic-transection-and-repair-in-a-dog
#16
Marie-Chantal Halwagi, Evan Crawford, Katie Hoddinott, Michelle L Oblak
A 12-year-old castrated male Airedale terrier dog was diagnosed with a hepatocellular carcinoma in the right medial liver lobe. During tumor resection, inadvertent stapling and transection of the caudal vena cava occurred. Complete caval occlusion was required for 18 minutes and primary anastomosis was completed. The dog received 2 blood transfusions and developed mild pelvic limb edema after surgery. Computed tomography evaluation 9 months after surgery showed collateral circulation and suspected stricture of the vena cava with an absence of clinical effect...
August 2017: Canadian Veterinary Journal. la Revue Vétérinaire Canadienne
https://www.readbyqxmd.com/read/28755277/chronic-remote-ischemic-conditioning-is-cerebroprotective-and-induces-vascular-remodeling-in-a-vcid-model
#17
Mohammad Badruzzaman Khan, Sherif Hafez, Md Nasrul Hoda, Babak Baban, Jesse Wagner, Mohamed E Awad, Hasith Sangabathula, Stephen Haigh, Mohammed Elsalanty, Jennifer L Waller, David C Hess
Vascular contributions to cognitive impairment and dementia (VCID) make up 50% of the cases of dementia. The purpose of this study was to determine the effect of chronic remote ischemic conditioning (C-RIC) on improving long-term (6 months) outcomes and cerebral blood flow (CBF) and collateral formation in a mouse model of VCID. Adult C57BL/6J male mice (10 weeks) were randomly assigned to four different groups: (1) sham-bilateral carotid artery stenosis (BCAS), (2) BCAS + sham RIC, (3) BCAS+C-RIC for 1 month (1MO), and (4) BCAS+C-RIC-4 months (4MO)...
July 28, 2017: Translational Stroke Research
https://www.readbyqxmd.com/read/28746179/the-efficacy-and-safety-of-dl-3n-butylphthalide-on-progressive-cerebral-infarction-a-randomized-controlled-strobe-study
#18
RANDOMIZED CONTROLLED TRIAL
Chenhao Zhang, Shuqin Zhao, Yanjing Zang, Fang Gu, Shufang Mao, Shanshan Feng, Lei Hu, Chunliang Zhang
Progressive cerebral infarction (PCI) is associated with high rates of mortality and disability. Many studies have shown that Dl-3n-butylphthalide (NBP) is effective against acute ischemic stroke. The administration of NBP can result in an increased number of capillaries in the ischemic region, promote the establishment of collateral circulation, protect the mitochondria, and narrow the infarction area, among other effects. In the present study, we evaluated the efficacy and safety of NBP for the treatment of PCI...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28745664/-predictors-of-cerebral-complications-during-carotid-endarterectomy
#19
O V Kamenskaya, I Yu Loginova, V V Lomivorotov
AIM: To evaluate the prognostic value of parameters of cerebral oxygenation in estimation of the risk of ischemic stroke (IS) in perioperative and early postoperative phase of carotid endarterectomy (CEE). MATERIAL AND METHODS: Four hundred and sixty-six patients with hemodynamically significant atherosclerotic lesion of arteries of the brachiocephalic system, who underwent CEE with bilateral monitoring of cerebral oxygenation (rSO2), were enrolled. The end-point of the study was cerebral complications in perioperative and early postoperative phase...
2017: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/28738486/-association-between-collateral-circulation-and-myocardial-viability-evaluated-by-cardiac-magnetic-resonance-imaging-in-patients-with-coronary-artery-chronic-total-occlusion
#20
J N Li, L J Zhang, Y He, Y L Chen, R C Huang, S Z Lyu, X T Song
Objective: Late gadolinium enhancement(LGE) cardiac magnetic resonance imaging(CMR) was used to evaluate the myocardial viability of chronic total occlusion(CTO) in patients with coronary heart disease and to observe the relationship between collateral circulation and myocardium viability in these patients. Methods: This retrospective study included 40 patients with CTO diagnosed by invasive coronary angiography (CAG) from September 2015 to June 2016 in our department, all patients performed CMR examination within one week after CAG...
July 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
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