The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Ali K Ozturk - One of the best experts on this subject based on the ideXlab platform.
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rotational Vertebrobasilar Insufficiency due to compression of a persistent first intersegmental vertebral artery variant case report
Journal of Neurosurgery, 2017Co-Authors: Vivek P Buch, Peter J Madsen, Kerry A Vaughan, Paul F Koch, David Kung, Ali K OzturkAbstract:Rotational Vertebrobasilar Insufficiency, or bow hunter's syndrome, is a rare cause of posterior circulation ischemia, which, following rotation of the head, results in episodic vertigo, dizziness, nystagmus, or syncope. While typically caused by dynamic occlusion of the vertebral artery in its V2 and V3 segments, the authors here describe a patient with dynamic occlusion of the vertebral artery secondary to a persistent first intersegmental artery, a rare variant course of the vertebral artery. In this case the vertebral artery coursed under rather than over the posterior arch of the C-1. This patient was also found to have incomplete development of the posterior arch of C-1, as is often seen with this variant. The patient underwent dynamic digital subtraction angiography, which demonstrated occlusion at the variant vertebral artery with head turning. He was then taken for decompression of the vertebral artery through removal of the incomplete arch of C-1 that was causing the dynamic compression. After s...
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rotational Vertebrobasilar Insufficiency due to compression of a persistent first intersegmental vertebral artery variant case report
Journal of Neurosurgery, 2017Co-Authors: Vivek P Buch, Peter J Madsen, Kerry A Vaughan, Paul F Koch, David Kung, Ali K OzturkAbstract:Rotational Vertebrobasilar Insufficiency, or bow hunter's syndrome, is a rare cause of posterior circulation ischemia, which, following rotation of the head, results in episodic vertigo, dizziness, nystagmus, or syncope. While typically caused by dynamic occlusion of the vertebral artery in its V2 and V3 segments, the authors here describe a patient with dynamic occlusion of the vertebral artery secondary to a persistent first intersegmental artery, a rare variant course of the vertebral artery. In this case the vertebral artery coursed under rather than over the posterior arch of the C-1. This patient was also found to have incomplete development of the posterior arch of C-1, as is often seen with this variant. The patient underwent dynamic digital subtraction angiography, which demonstrated occlusion at the variant vertebral artery with head turning. He was then taken for decompression of the vertebral artery through removal of the incomplete arch of C-1 that was causing the dynamic compression. After surgery the patient had a complete resolution of symptoms. In this report, the authors present the details of this case, describe the anatomical variants involved, and provide a discussion regarding the need for atlantoaxial fusion in these patients.
Vivek P Buch - One of the best experts on this subject based on the ideXlab platform.
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rotational Vertebrobasilar Insufficiency due to compression of a persistent first intersegmental vertebral artery variant case report
Journal of Neurosurgery, 2017Co-Authors: Vivek P Buch, Peter J Madsen, Kerry A Vaughan, Paul F Koch, David Kung, Ali K OzturkAbstract:Rotational Vertebrobasilar Insufficiency, or bow hunter's syndrome, is a rare cause of posterior circulation ischemia, which, following rotation of the head, results in episodic vertigo, dizziness, nystagmus, or syncope. While typically caused by dynamic occlusion of the vertebral artery in its V2 and V3 segments, the authors here describe a patient with dynamic occlusion of the vertebral artery secondary to a persistent first intersegmental artery, a rare variant course of the vertebral artery. In this case the vertebral artery coursed under rather than over the posterior arch of the C-1. This patient was also found to have incomplete development of the posterior arch of C-1, as is often seen with this variant. The patient underwent dynamic digital subtraction angiography, which demonstrated occlusion at the variant vertebral artery with head turning. He was then taken for decompression of the vertebral artery through removal of the incomplete arch of C-1 that was causing the dynamic compression. After s...
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rotational Vertebrobasilar Insufficiency due to compression of a persistent first intersegmental vertebral artery variant case report
Journal of Neurosurgery, 2017Co-Authors: Vivek P Buch, Peter J Madsen, Kerry A Vaughan, Paul F Koch, David Kung, Ali K OzturkAbstract:Rotational Vertebrobasilar Insufficiency, or bow hunter's syndrome, is a rare cause of posterior circulation ischemia, which, following rotation of the head, results in episodic vertigo, dizziness, nystagmus, or syncope. While typically caused by dynamic occlusion of the vertebral artery in its V2 and V3 segments, the authors here describe a patient with dynamic occlusion of the vertebral artery secondary to a persistent first intersegmental artery, a rare variant course of the vertebral artery. In this case the vertebral artery coursed under rather than over the posterior arch of the C-1. This patient was also found to have incomplete development of the posterior arch of C-1, as is often seen with this variant. The patient underwent dynamic digital subtraction angiography, which demonstrated occlusion at the variant vertebral artery with head turning. He was then taken for decompression of the vertebral artery through removal of the incomplete arch of C-1 that was causing the dynamic compression. After surgery the patient had a complete resolution of symptoms. In this report, the authors present the details of this case, describe the anatomical variants involved, and provide a discussion regarding the need for atlantoaxial fusion in these patients.
Nelson L Hopkins - One of the best experts on this subject based on the ideXlab platform.
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retrograde angioplasty for basilar artery stenosis bypassing bilateral vertebral artery occlusions
Journal of Neurosurgery, 2009Co-Authors: Paul T L Chiam, J Mocco, Rodney M Samuelson, Adnan H Siddiqui, Nelson L HopkinsAbstract:Basilar artery angioplasty with or without stenting is an emerging and promising treatment for Vertebrobasilar Insufficiency that is refractory to medical therapy. The usual approach is via a transfemoral route, with access directly through the vertebral artery (VA). An approach from the anterior circulation via the posterior communicating artery has been reported for optimal stent positioning and deployment across basilar apex aneurysms. No similar technique has been reported for treatment of midbasilar stenosis. The authors report a case of severe symptomatic basilar stenosis in which both VAs were occluded. The only option was to perform retrograde basilar angioplasty via the posterior communicating artery. This useful technique should be part of the armamentarium for the percutaneous treatment of symptomatic Vertebrobasilar Insufficiency for the occasional patient in whom occlusion or tortuosity precludes direct access to the VA.
Peter J Madsen - One of the best experts on this subject based on the ideXlab platform.
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rotational Vertebrobasilar Insufficiency due to compression of a persistent first intersegmental vertebral artery variant case report
Journal of Neurosurgery, 2017Co-Authors: Vivek P Buch, Peter J Madsen, Kerry A Vaughan, Paul F Koch, David Kung, Ali K OzturkAbstract:Rotational Vertebrobasilar Insufficiency, or bow hunter's syndrome, is a rare cause of posterior circulation ischemia, which, following rotation of the head, results in episodic vertigo, dizziness, nystagmus, or syncope. While typically caused by dynamic occlusion of the vertebral artery in its V2 and V3 segments, the authors here describe a patient with dynamic occlusion of the vertebral artery secondary to a persistent first intersegmental artery, a rare variant course of the vertebral artery. In this case the vertebral artery coursed under rather than over the posterior arch of the C-1. This patient was also found to have incomplete development of the posterior arch of C-1, as is often seen with this variant. The patient underwent dynamic digital subtraction angiography, which demonstrated occlusion at the variant vertebral artery with head turning. He was then taken for decompression of the vertebral artery through removal of the incomplete arch of C-1 that was causing the dynamic compression. After s...
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rotational Vertebrobasilar Insufficiency due to compression of a persistent first intersegmental vertebral artery variant case report
Journal of Neurosurgery, 2017Co-Authors: Vivek P Buch, Peter J Madsen, Kerry A Vaughan, Paul F Koch, David Kung, Ali K OzturkAbstract:Rotational Vertebrobasilar Insufficiency, or bow hunter's syndrome, is a rare cause of posterior circulation ischemia, which, following rotation of the head, results in episodic vertigo, dizziness, nystagmus, or syncope. While typically caused by dynamic occlusion of the vertebral artery in its V2 and V3 segments, the authors here describe a patient with dynamic occlusion of the vertebral artery secondary to a persistent first intersegmental artery, a rare variant course of the vertebral artery. In this case the vertebral artery coursed under rather than over the posterior arch of the C-1. This patient was also found to have incomplete development of the posterior arch of C-1, as is often seen with this variant. The patient underwent dynamic digital subtraction angiography, which demonstrated occlusion at the variant vertebral artery with head turning. He was then taken for decompression of the vertebral artery through removal of the incomplete arch of C-1 that was causing the dynamic compression. After surgery the patient had a complete resolution of symptoms. In this report, the authors present the details of this case, describe the anatomical variants involved, and provide a discussion regarding the need for atlantoaxial fusion in these patients.
Kerry A Vaughan - One of the best experts on this subject based on the ideXlab platform.
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rotational Vertebrobasilar Insufficiency due to compression of a persistent first intersegmental vertebral artery variant case report
Journal of Neurosurgery, 2017Co-Authors: Vivek P Buch, Peter J Madsen, Kerry A Vaughan, Paul F Koch, David Kung, Ali K OzturkAbstract:Rotational Vertebrobasilar Insufficiency, or bow hunter's syndrome, is a rare cause of posterior circulation ischemia, which, following rotation of the head, results in episodic vertigo, dizziness, nystagmus, or syncope. While typically caused by dynamic occlusion of the vertebral artery in its V2 and V3 segments, the authors here describe a patient with dynamic occlusion of the vertebral artery secondary to a persistent first intersegmental artery, a rare variant course of the vertebral artery. In this case the vertebral artery coursed under rather than over the posterior arch of the C-1. This patient was also found to have incomplete development of the posterior arch of C-1, as is often seen with this variant. The patient underwent dynamic digital subtraction angiography, which demonstrated occlusion at the variant vertebral artery with head turning. He was then taken for decompression of the vertebral artery through removal of the incomplete arch of C-1 that was causing the dynamic compression. After s...
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rotational Vertebrobasilar Insufficiency due to compression of a persistent first intersegmental vertebral artery variant case report
Journal of Neurosurgery, 2017Co-Authors: Vivek P Buch, Peter J Madsen, Kerry A Vaughan, Paul F Koch, David Kung, Ali K OzturkAbstract:Rotational Vertebrobasilar Insufficiency, or bow hunter's syndrome, is a rare cause of posterior circulation ischemia, which, following rotation of the head, results in episodic vertigo, dizziness, nystagmus, or syncope. While typically caused by dynamic occlusion of the vertebral artery in its V2 and V3 segments, the authors here describe a patient with dynamic occlusion of the vertebral artery secondary to a persistent first intersegmental artery, a rare variant course of the vertebral artery. In this case the vertebral artery coursed under rather than over the posterior arch of the C-1. This patient was also found to have incomplete development of the posterior arch of C-1, as is often seen with this variant. The patient underwent dynamic digital subtraction angiography, which demonstrated occlusion at the variant vertebral artery with head turning. He was then taken for decompression of the vertebral artery through removal of the incomplete arch of C-1 that was causing the dynamic compression. After surgery the patient had a complete resolution of symptoms. In this report, the authors present the details of this case, describe the anatomical variants involved, and provide a discussion regarding the need for atlantoaxial fusion in these patients.