Harish Jadav. N
Associate professor, Department of Neurosurgery, Gandhi Medical College / Gandhi Hospital Secunderabad TS.
Abstract
BACKGROUND: The blood flow pattern and vessel architecture are disturbed in the neurovascular malformation. The cerebral arteriovenous malformation (CAVM) is a type of cerebrovascular illness characterized by impaired blood flow and a tangle of aberrant blood vessels formed by the direct connection of arteries to veins in the absence of a capillary bed. The term "Nidus" refers to the tangled aberrant vessels that make up the center portion of the deformity. A lot of blood is taken because the AVM-affected area has extremely low pressure. In comparison to normal pressure readings, there is a significant build-up of pressure in the blood vessels, particularly in the veins, because of changes in blood flow patterns. It creates the pressure gradient between veins and arteries.
MATERIAL AND METHODS: The Study was conducted in the Department of Neurosurgery. We follow reporting criteria for CAVM examined a range of CAVM features and Nidus structure types. The AVMs are made up of different permutations of the Nidus complex vascular structure and are found in numerous parts of the human body, including the spine and lungs. For every kind of CAVM, there is a distinct way that Nidus structures form. Because the AVM may burst, the intrusive technique used to get hemodynamic measures for each type of AVM in different organs is challenging for doctors and dangerous for patients.
RESULTS: Absolute mean feeder artery flow (498.6 versus 430.3 mL/min; P=0.51) was similar between the 2 groups and vessel diameter (4.0 versus 4.8 mm; P=0.24) tended to be lower in feeders with aneurysms, but not significantly. However, WSS (95.7 versus 27.9 dynes/cm2; P=0.04) was significantly higher in feeders with aneurysms.
CONCLUSION: Feeder artery diameter tended to be lower in feeders with aneurysms despite comparable high flows, suggesting that this subgroup of AVM feeders is incapable of compensating for increased blood flow through vascular remodeling.
KEY WORDS: Cerebral Arteriovenous Malformations, Hemodynamics, Feeder Vessels, Internal carotid artery and Wall shear stress