• Angiography demonstrated obliteration of the peripheral artery aneurysms, together with the disappearance or decrease in caliber of the parent collateral arteries, after surgery. (nih.gov)
  • Identification of the intracranial collaterals assists in identifying patients with severe occlusive disease of the internal carotid arteries who are at lower risk of transient ischemic attacks (TIAs) and stroke. (ajnr.org)
  • Knowledge of the collateral ability of the circle of Willis is important for neurosurgeons, vascular surgeons, and interventional radiologists when a procedure in the intracranial or extracranial cerebral arteries is to be attempted. (ajnr.org)
  • Prevalence is derived from studies by using an external diameter of 1 mm as a threshold for hypoplasia of collateral arteries. (ajnr.org)
  • However, it is not clear whether opacification of intracranial collaterals on conventional angiograms or MR angiograms proves that they can act as functional collaterals when carotid arteries become stenotic or occluded. (ajnr.org)
  • Female patient aged 18 months and weighing 9kg with a diagnosis of pulmonary atresia plus ventricular septal defect, plus systemic pulmonary collateral arteries (MAPCAS) with absence of pulmonary branches. (modelosmedicos.com)
  • Case report 2: 6-month-old male patient diagnosed with pulmonary atresia with ventricular septal defect and aorto-pulmonary collateral arteries (MAPCAS). (modelosmedicos.com)
  • Measurement of the diameters of the collateral arteries and their location in space. (modelosmedicos.com)
  • In the arterial phase, the hepatic and splenic arteries were well defined, but the collateral pathways of the celiac and superior mesenteric arteries were unclear (Fig. 1 d). (biomedcentral.com)
  • Blockages caused by plaque build-up or atherosclerosis in any of these arteries can reduce leg blood circulation, causing leg pain that may interfere with daily life. (wikipedia.org)
  • Paracentral acute middle maculopathy (PAMM) can result from decreased perfusion to retinal and choroidal circulations meeting in the inner nuclear layer (INL) and outer plexiform layer (OPL). (bvsalud.org)
  • An aneurysm is considered optimal for endovascular management if the front and back door vessels of the aneurysm can be accessed and occluded by a catheter-based system and if end organ perfusion can be preserved by collateral flow or stent graft therapy (Chadha and Ahuja 2009 ). (springeropen.com)
  • To investigate the prevalence of venous collaterals after branch and central retinal vein occlusion, assess the association of venous collaterals with other clinical features (including visual acuity), and determine if treatment with intravitreal corticosteroids influences the development of new venous collaterals. (emmes.com)
  • In contrast to some previous reports, development of venous collaterals did not demonstrate an independent association with visual acuity in eyes with branch retinal vein occlusion or central retinal vein occlusion in the SCORE Study. (emmes.com)
  • The second terminal artery, called the "isolated artery", penetrates the liver parenchyma unaccompanied by the bile duct, creating extrahepatic and intersegmental collaterals after repeated TACE procedures, which can feed a residual tumour. (springer.com)
  • However, HCCs supplied by extrahepatic collateral vessels are frequently encountered in clinical practice with a reported rate of up to 27% in patients undergoing TACE [ 3 ]. (biomedcentral.com)
  • The inferior phrenic artery is one of the most frequently involved extrahepatic collateral vessels. (biomedcentral.com)
  • Cerebral angiography revealed that intracranial bleeding resulted from the rupture of peripheral artery aneurysms arising from dilated collateral vessels such as the lenticulostriate artery. (nih.gov)
  • The results strongly suggest that surgical revascularization potentially improves cerebral circulation and decreases hemodynamic stress on collateral vessels, obliterating peripheral artery aneurysms. (nih.gov)
  • Other parameters, such as collateral circulation and cerebral circulation time (CCT), might influence the stroke risk in CS. (bmj.com)
  • At nine months, a CT angiography was performed to assess the systemic-pulmonary collaterals and evaluate therapeutic possibilities: stent implantation or unifocalisation surgery. (modelosmedicos.com)
  • Score Study Report 12: Development of venous collaterals in the Score Study. (emmes.com)
  • Statistically significant associations of venous collaterals and visual acuity at baseline or at follow-up were not found. (emmes.com)
  • Treatment with intravitreal triamcinolone acetonide did not appear to influence the development of venous collaterals. (emmes.com)
  • Intravitreal steroid effects do not appear to influence the development of venous collaterals. (emmes.com)
  • The incidence of partial venous obstruction in patients with pacing and defibrillation devices is usually between 31% and 64%, although most patients remain asymptomatic because of collateral circulation developing. (hvt-journal.com)
  • The aim of this study was to evaluate whether cfDNA methylation patterns are associated with the grade of coronary collateral circulation (CCC). (biomedcentral.com)
  • The development and presence of coronary collateral circulation (CCC) has great clinical importance in patients with ischemic heart disease. (biomedcentral.com)
  • CONCLUSIONS There is evidence of persisting abnormal vascular wall morphology and vascular dysfunction at the site of regressed coronary aneurysms in patients with previous Kawasaki disease. (bmj.com)
  • Results were compared with those of transcranial color duplex sonography (TCCD), and results of carotid compression tests were the standard of reference for the identification of functional intracranial collaterals. (ajnr.org)
  • Visible collaterals of the circle of Willis on MR angiograms are able to supply collateral flow in the presence of carotid artery obstruction. (ajnr.org)
  • The circle of Willis, located at the base of the brain, provides the main route for collateral blood flow in severe occlusive disease of the internal carotid artery (ICA). (ajnr.org)
  • Furthermore, patients undergoing carotid endarterectomy who have collaterals supplying the operative side are less likely to have a perioperative stroke ( 1 ). (ajnr.org)
  • The prognostic value of functioning intracranial collaterals in patients with occlusive disease of the carotid artery is the subject of ongoing studies ( 2 ). (ajnr.org)
  • Our results support the clinical utility of noninvasively obtained epigenetic signatures for predicting collateral circulation in patients with vascular diseases. (biomedcentral.com)
  • Conclusion: This study provides evidence for the utility of a radiomic nomogram integrating clinical and radiomic signatures for differentiating IVL and LM with improved diagnostic accuracy. (bvsalud.org)
  • Conclusions DSA derived CCT is more reflective of the hemodynamic differences between symptomatic and asymptomatic CS than degree of stenosis. (bmj.com)
  • Acute limb ischemia is defined as a sudden inadequate blood circulation of the limbs or a sudden worsening of pre-existing ischemic disease of the limbs, manifested by pain, disturbance of perception and movement of different intensity and range, depending on etiology and localization of artery occlusion. (biomedres.us)
  • Localization of a vessel occlusion and collateral status may play a role in the development of MBE. (bmj.com)
  • The mechanisms of vascular reperfusion could be summarized as complete degradation, peripheral migration, partial dislodgement, angiophagy, and collateral circulation. (nih.gov)
  • Pathological processes involving any of the BLOOD VESSELS in the cardiac or peripheral circulation. (lookformedical.com)
  • Orthodontic forces may impede pulp circulation, causing vascular congestion and pulp edema, leading to pulp damage 14,27 and even necrosis in teeth submitted to traction [29]. (bvsalud.org)
  • In patients with good collaterals, the development of an rFLAIR-positive lesion is less dependent on time from symptom onset compared with patients with poor collaterals. (lu.se)
  • CT angiography can be used to identify patients with large-artery occlusions potentially amenable to intra-arterial therapy, 1 ⇓ - 3 and CT angiography source images have been proposed as a means of evaluating collateral circulation. (ajnr.org)
  • Patients with an anterior communicating artery (AcoA) and a posterior communicating artery (PcoA) that supply the hemisphere distal to a severe ICA stenosis have a risk of transient ischemic attack (TIA) and stroke that is lower than that of patients without such collaterals ( 1 ). (ajnr.org)
  • Identification of intracranial collaterals assists in identifying patients with severe ICA occlusive disease at lower risk of TIA and stroke ( 1 ). (ajnr.org)
  • The presence of a tortuous vessel consistent with spleno-systemic collateral circulation was observed by ultrasonography or CT examinations in all patients with a "spaghetti sign" on abdominal radiographs. (avmi.net)
  • In conclusion, findings supported the hypothesis that a radiographic "spaghetti sign" is a predictor of spleno-systemic collateral circulation in feline patients and should be distinguished from other signs such as focal loss of serosal detail or a space occupying lesion. (avmi.net)
  • The reproducibility of psychosocial subscale was lower than physical and cognitive subscales.Conclusion:According to our findings, the Persian version of the MFIS has a good reliability and reproducibility for assessment of fatigue in patients with MS. (ac.ir)
  • Reports investigating the relationship between in-procedure blood pressure (BP) and outcomes in patients undergoing endovascular thrombectomy (EVT) due to anterior circulation stroke are sparse and contradictory. (j-stroke.org)
  • Methods We included 130 consecutive patients after MT caused by anterior circulation large vessel occlusion stroke, treated with MT. MBE was defined as a midline shift of ≥5 mm on the follow-up imaging within 72 hours after MT. Characteristics of patients at admission and details of treatment were collected. (bmj.com)
  • Recent landmark randomized controlled trials 1-3 have validated the efficacy and safety of mechanical thrombectomy (MT) over medical treatment in patients with anterior circulation large vessel occlusion stroke (LVOS). (bmj.com)
  • in conclusion, although aware of the limits of the statistical analysis due to the small number of patients, our results demonstrated that endoscopic and US parameters (isolated or combined) can identify patients with a high risk of variceal bleeding, allowing physicians to optimize prophylactic therapy. (unifesp.br)
  • Chez les patients hypertendus, le taux de mortalité était plus élevé uniquement chez les patients admis pour un infarctus du myocarde avec sus-décalage du segment ST. Après ajustement des résultats en fonction des variables de référence, l'hypertension s'est révélé être un facteur prédictif indépendant de l'insuffisance cardiaque (OR = 1,31) et de l'accident vasculaire cérébral (OR = 2,47). (who.int)
  • circulation established through indirect or subordinate branches when the supply through the main vessel is obstructed. (freedictionary.org)
  • Unfortunately, hypoplasia of vessel segments frequently hampers the collateral function of the circle of Willis ( Fig 1 ). (ajnr.org)
  • Conclusion The choice of surgical vs percutaneous methods for treating a thrombosed graft remains controversial. (ochsnerjournal.org)
  • As spectators and players of the stablecoin landscape, we see the above-described projects "repeating" each other with a varying degree of modifications, but we are also surprised to see that new projects appear every week and none of them is choosing Bitcoin as collateral. (moneyonchain.com)
  • At its core, Dai is a collateral-backed stablecoin. (techbuzzireland.com)
  • These CDPs ensure that each unit of Dai is backed by an appropriate amount of collateral, providing stability to the stablecoin. (techbuzzireland.com)
  • Our findings show that the relationship between time from symptom onset and rFLAIR lesion intensity depends on collateral status. (lu.se)
  • CONCLUSIONS: The presence of contrast staining on DECT after EVT is associated with a higher risk of hemorrhage transformation and poor functional outcome. (bvsalud.org)
  • It will be used for governance, collateral rewards, and clearing remuneration. (sp0m.org)
  • Association Between Time From Stroke Onset and Fluid-Attenuated Inversion Recovery Lesion Intensity Is Modified by Status of Collateral Circulation. (lu.se)
  • We hypothesized that collateral status as assessed by the hypoperfusion intensity ratio could modify the association between time from stroke onset and FLAIR lesion intensity. (lu.se)
  • We investigated the usefulness of MR angiography in identifying functional collaterals of the circle of Willis. (ajnr.org)
  • However, the low negative predictive value of MR angiography indicates that, if collaterals are not visible, supplementary TCCD investigation is required. (ajnr.org)
  • MR angiography, when compared with conventional angiography (Table 1) , has had a moderate to high level of sensitivity and specificity in the identification of intracranial collaterals ( 4 , 5 ). (ajnr.org)
  • The thrombotic type of closure is formed on the basis of a preexisting atherosclerotic throat, with ischaemia manifestations less severe than with a sudden embolic closure, due to the possible presence of collateral circulation. (biomedres.us)
  • While there is a significant risk associated with visceral malperfusion, ischemia due to occlusion of the celiac artery alone is rare due to the presence of extensive collateral pathways in the mesenteric circulation. (biomedcentral.com)
  • Visibility was used as the criterion to define the intracranial collaterals as being functional. (ajnr.org)
  • Conclusions MBE after MT is not uncommon and was related to poor functional outcomes. (bmj.com)
  • We studied the interaction between collateral status on the association between time from symptom onset and FLAIR intensity. (lu.se)
  • Because of wide variability in collateral circulation, time elapsed since onset is a crude indicator of the potential benefit of treatment in each patient. (ajnr.org)
  • As long as the ulnar collateral circulation is sufficient, the transradial procedure can be safely performed without considering any other anthropometric parameters. (gazi.edu.tr)
  • This overcollateralization acts as a buffer against market fluctuations, ensuring that the collateral value remains sufficient to cover the Dai in circulation. (techbuzzireland.com)
  • The difference between all these lies in the mechanism they use to achieve the stability of the peg, which in turn depends on the type of collateral they use (or no collateral at all in the case of some algorithm-backed ones). (moneyonchain.com)
  • In conclusion, the teeth that had been submitted to orthodontic traction were more likely to lack sensitivity than those that had not been submitted to the same procedure. (bvsalud.org)
  • The guidewire could not be successfully passed beyond the cephalic arch into central circulation because of an obstruction at the previously placed upper arm cephalic vein stent. (ochsnerjournal.org)
  • Popliteal bypass surgery may be performed on people with the following symptoms and conditions: Disruption in daily life or the ability to walk from intermittent claudication Persistent wounds in the leg Infection or gangrene Ischemic rest pain (due to lack of blood circulation resulting in leg pain at rest) Generally, a vein bypass lasts at least 5 years in 60-70 percent of people. (wikipedia.org)
  • A hypoperfusion intensity ratio threshold of ≤0.4 was used to dichotomize good versus poor collaterals. (lu.se)
  • If the value of the collateral falls below a certain threshold, triggering liquidation, the system automatically auctions off the collateral to ensure the stability of Dai. (techbuzzireland.com)
  • CONCLUSION: It was feasible and secure to use Stanford A aortic dissection complete endovascular reconstruction system to implement a transcatheter endovascular repair in a porcine model. (bvsalud.org)
  • Preservation of this access site was only possible because of an unusual finding of collateral circulation, with the median cubital vein acting as a conduit to the basilic vein. (ochsnerjournal.org)
  • Fistulogram shows the blocked cephalic vein and collateral flow through the median cubital vein (arrow) into the basilic vein. (ochsnerjournal.org)
  • This study was conducted to (1) investigate whether CCT is more associated with symptomatic CS than degree of stenosis and (2) elucidate the associations among the degree of stenosis, collateral status, and CCT. (bmj.com)
  • The degree of stenosis, collateral status, and CCT of the two groups were compared. (bmj.com)
  • CCT (OR 1.95, p=0.013) was more associated with symptomatic CS than the degree of stenosis (OR 1.03, p = 0.229), after adjustment for potential confounders-namely, age, sex, antithrombotic use, and collateral status. (bmj.com)
  • Fistulogram displays the flow of dye (arrows) along the arteriovenous graft and the collateral blood flow in the cubital fossa. (ochsnerjournal.org)
  • collateral relations spring from a common ancestor, but from different branches of that common stirps or stock. (freedictionary.org)