Intravascular pressure measurements in feeding pedicles of brain arteriovenous malformations

2005 ◽  
Vol 48 (3) ◽  
pp. 182-189 ◽  
Author(s):  
H. Henkes ◽  
T. F. Gotwald ◽  
S. Brew ◽  
E. Miloslavski ◽  
F. Kämmerer ◽  
...  
2021 ◽  
pp. neurintsurg-2021-018067
Author(s):  
Mika S Jain ◽  
Nicholas A Telischak ◽  
Jeremy J Heit ◽  
Huy M Do ◽  
Tarik F Massoud

BackgroundHigh-flow fistulas related to plexiform nidi are found in 40% of large brain arteriovenous malformations (AVMs). Endovascular occlusion of intranidal fistulas before plexiform components is empirically considered safe, but potential ensuing dangerous re-routing of flow through plexiform vessels may in theory raise their rupture risk. It remains unclear whether it is safer to embolize plexiform or fistulous vessels initially. We used a novel biomathematical AVM model to compare theoretical hemodynamic changes and rupture risks on sequential embolizations of both types of nidus vessels.MethodsWe computationally modeled a theoretical AVM as an electrical circuit containing a nidus consisting of a massive stochastic network ensemble comprising 1000 vessels. We sampled and individually simulated 10 000 different nidus morphologies with a fistula angioarchitecturally isolated from its adjacent plexiform nidus. We used network analysis to calculate mean intravascular pressure (Pmean) and flow rate within each nidus vessel; and Monte Carlo analysis to assess overall risks of nidus rupture when simulating sequential occlusions of vessel types in all 10 000 nidi.ResultsWe consistently observed lower nidus rupture risks with initial fistula occlusion in different network morphologies. Intranidal fistula occlusion simultaneously reduced Pmean and flow rate within draining veins.ConclusionsInitial occlusion of AVM fistulas theoretically reduces downstream draining vessel hypertension and lowers the risk of rupture of an adjoining plexiform nidus component. This mitigates the theoretical concern that fistula occlusion may cause dangerous redistribution of hemodynamic forces into plexiform nidus vessels, and supports a clinical strategy favoring AVM fistula occlusion before plexiform nidus embolization.


2020 ◽  
Author(s):  
Romain Capocci ◽  
Mihaela Bustuchina Vlaicu ◽  
Eimad Shotar ◽  
Bertrand Mathon ◽  
Mariette Delaitre ◽  
...  

Children ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 215
Author(s):  
Lukasz Antkowiak ◽  
Monika Putz ◽  
Marta Rogalska ◽  
Marek Mandera

Bleeding from ruptured brain arteriovenous malformations (bAVMs) represents the most prevalent cause of pediatric intracranial hemorrhage, being also the most common initial bAVM manifestation. A therapeutic approach in these patients should aim at preventing rebleeding and associated significant morbidity and mortality. The purpose of this study was to determine the clinical outcomes of pediatric patients who initially presented at our institution with ruptured bAVMs and to review our experience with a multimodality approach in the management of pediatric ruptured bAVMs. We retrospectively reviewed pediatric patients’ medical records with ruptured bAVMs who underwent interventional treatment (microsurgery, embolization, or radiosurgery; solely or in combination) at our institution between 2011 and 2020. We identified 22 patients. There was no intraoperative and postoperative intervention-related mortality. Neither procedure-related complications nor rebleeding were observed after interventional treatment. Modified Rankin Scale (mRS) assessment at discharge revealed 19 patients (86.4%) with favorable outcomes (mRS 0–2) and 3 patients (13.6%) classified as disabled (mRS 3). Microsurgery ensured the complete obliteration in all patients whose postoperative digital subtraction angiography (DSA) was available. Management of high-grade bAVMs with radiosurgery or embolization can provide satisfactory outcomes without a high disability risk.


Neurosurgery ◽  
2000 ◽  
Vol 47 (2) ◽  
pp. 389-397 ◽  
Author(s):  
Mitchell F. Berman ◽  
Robert R. Sciacca ◽  
John Pile-Spellman ◽  
Christian Stapf ◽  
E. Sander Connolly ◽  
...  

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