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H Abe - One of the best experts on this subject based on the ideXlab platform.

  • Results of the surgical treatment of perimedullary arteriovenous fistulas with special reference to embolization.
    Journal of neurosurgery, 1999
    Co-Authors: K Hida, Y Iwasaki, K Goto, K Miyasaka, H Abe
    Abstract:

    This retrospective study was performed to evaluate the results of surgical treatment and the use of preoperative embolization in managing patients with perimedullary arteriovenous fistulas (AVFs). The authors studied 20 consecutive patients with perimedullary AVFs who underwent surgical treatment. Arteriovenous shunts were at the level of the cervical spine in five patients, the thoracic spine in 12, and the conus medullaris in three patients. Of the 20 AVFs, three were fed by the anterior Spinal Artery only, three by the Posterior Spinal Artery, and 14 by both the anterior and Posterior Spinal arteries. Nine patients had varices that compressed the Spinal cord. Eleven patients underwent surgery, and nine patients underwent surgery combined with adjuvant preoperative embolization. Preoperative embolization remarkably reduced blood flow through the AVFs and facilitated subsequent surgical procedures. Postoperative angiography revealed complete disappearance of the AVFs in 16 patients. However, small fistulas persisted in the other four patients, whose large lesions were fed by the anterior Spinal Artery. Postoperatively, neurological status was improved in 11 patients, unchanged in eight, and worse in one patient. Effective interruption of a Spinal arteriovenous shunt was achieved by surgery in all cases, even when the anterior Spinal Artery was involved. For large and high-flow AVFs, embolization proved to be a useful adjunct to surgery.

  • Results of the surgical treatment of perimedullary arteriovenous fistulas with special reference to embolization
    Journal of Neurosurgery: Spine, 1999
    Co-Authors: K Hida, Yoshinobu Iwasaki, K Goto, K Miyasaka, H Abe
    Abstract:

    Object. This retrospective study was performed to evaluate the results of surgical treatment and the use of preoperative embolization in managing patients with perimedullary arteriovenous fistulas (AVFs). Methods. The authors studied 20 consecutive patients with perimedullary AVFs who underwent surgical treatment. Arteriovenous shunts were at the level of the cervical spine in five patients, the thoracic spine in 12, and the conus medullaris in three patients. Of the 20 AVFs, three were fed by the anterior Spinal Artery only, three by the Posterior Spinal Artery, and 14 by both the anterior and Posterior Spinal arteries. Nine patients had varices that compressed the Spinal cord. Eleven patients underwent surgery, and nine patients underwent surgery combined with adjuvant preoperative embolization. Preoperative embolization remarkably reduced blood flow through the AVFs and facilitated subsequent surgical procedures. Postoperative angiography revealed complete disappearance of the AVFs in 16 patients. However, small fistulas persisted in the other four patients, whose large lesions were fed by the anterior Spinal Artery. Postoperatively, neurological status was improved in 11 patients, unchanged in eight, and worse in one patient. Conclusions. Effective interruption of a Spinal arteriovenous shunt was achieved by surgery in all cases, even when the anterior Spinal Artery was involved. For large and high-flow AVFs, embolization proved to be a useful adjunct to surgery.

  • Results of the surgical treatment of perimedullary arteriovenous fistulas with special reference to embolization
    Neurosurgical Focus, 1998
    Co-Authors: K Hida, Yoshinobu Iwasaki, K Goto, K Miyasaka, H Abe
    Abstract:

    This retrospective study was performed to evaluate the results of surgical treatment and the use of preoperative embolization in managing perimedullary arteriovenous fistulas (AVFs). The authors studied 20 consecutive patients with perimedullary AVFs who underwent surgical treatment. Arteriovenous shunts were at the level of the cervical spine in five patients, the thoracic spine in 12, and the conus medullaris in three patients. Of the 20 AVFs, three were fed by the anterior Spinal Artery only, three by the Posterior Spinal Artery, and 14 by both the anterior and Posterior Spinal arteries. Nine patients had varices that compressed the Spinal cord. Eleven patients underwent surgery alone, and 9 patients underwent surgery combined with adjuvant preoperative embolization. Preoperative embolization remarkably reduced the blood flow through AVFs and facilitated subsequent surgical procedures. Postoperative angiography revealed complete disappearance of the AVF in 16 patients. However, small fistulas persisted in the other four patients whose large lesions were fed by the anterior Spinal Artery. Neurological status was improved in 11 patients, unchanged in eight, and worse in one patient postsurgery. Effective interruption of a Spinal AV shunt was obtained by surgery in all cases, even when the anterior Spinal Artery was involved. For large and high-flow AVFs, embolization proved to be a useful adjunct to surgery.

K Hida - One of the best experts on this subject based on the ideXlab platform.

  • conus perimedullary arteriovenous fistula with multiple shunt points including the cauda equina a case report
    No shinkei geka. Neurological surgery, 2011
    Co-Authors: Hisayasu Saito, Yoshinobu Iwasaki, K Hida, Takeshi Asano, Shunsuke Yano, Takeshi Aoyama, Kiyohiro Houkin
    Abstract:

    Perimedullary arteriovenous fistula (AVF) is usually located on the surface of the Spinal cord and is fed by the anterior Spinal Artery and/or the Posterior Spinal Artery. We report a rare case of Conus perimedullary AVF with multiple shunt points including the cauda equina. A 68-year-old man presented with leg pain when walking long distances. Magnetic resonance imaging at the thoracic and lumbar level revealed multiple signal voids with marked cord signal change. Angiography showed the perimedullary AVF fed by the anterior Spinal Artery from the right T9 intercostal Artery at the level of the conus medullaris and the fistula fed by the left lateral sacral Artery from the left internal iliac Artery at the level of the cauda equina. In the first surgery, we performed surgical interruption of feeding arteries from the filum terminale and coagulated AV shunt of the conus medullaris. However residual perimedullary AVF was found at the conus medullaris in the postoperative angiography. Secondary surgery was carried out to treat residual AVF. Follow-up angiography showed complete disappearance of all AVFs. Postoperatively, the patient`s symptoms were improved. Because the Conus perimedullary AVF has the characteristics of multiple feeding arteies, multiple shunt points, and complex venous drainage, it must be kept in mind that other fistula could exist in the cauda equina or filum terminale.

  • Results of the surgical treatment of perimedullary arteriovenous fistulas with special reference to embolization.
    Journal of neurosurgery, 1999
    Co-Authors: K Hida, Y Iwasaki, K Goto, K Miyasaka, H Abe
    Abstract:

    This retrospective study was performed to evaluate the results of surgical treatment and the use of preoperative embolization in managing patients with perimedullary arteriovenous fistulas (AVFs). The authors studied 20 consecutive patients with perimedullary AVFs who underwent surgical treatment. Arteriovenous shunts were at the level of the cervical spine in five patients, the thoracic spine in 12, and the conus medullaris in three patients. Of the 20 AVFs, three were fed by the anterior Spinal Artery only, three by the Posterior Spinal Artery, and 14 by both the anterior and Posterior Spinal arteries. Nine patients had varices that compressed the Spinal cord. Eleven patients underwent surgery, and nine patients underwent surgery combined with adjuvant preoperative embolization. Preoperative embolization remarkably reduced blood flow through the AVFs and facilitated subsequent surgical procedures. Postoperative angiography revealed complete disappearance of the AVFs in 16 patients. However, small fistulas persisted in the other four patients, whose large lesions were fed by the anterior Spinal Artery. Postoperatively, neurological status was improved in 11 patients, unchanged in eight, and worse in one patient. Effective interruption of a Spinal arteriovenous shunt was achieved by surgery in all cases, even when the anterior Spinal Artery was involved. For large and high-flow AVFs, embolization proved to be a useful adjunct to surgery.

  • Results of the surgical treatment of perimedullary arteriovenous fistulas with special reference to embolization
    Journal of Neurosurgery: Spine, 1999
    Co-Authors: K Hida, Yoshinobu Iwasaki, K Goto, K Miyasaka, H Abe
    Abstract:

    Object. This retrospective study was performed to evaluate the results of surgical treatment and the use of preoperative embolization in managing patients with perimedullary arteriovenous fistulas (AVFs). Methods. The authors studied 20 consecutive patients with perimedullary AVFs who underwent surgical treatment. Arteriovenous shunts were at the level of the cervical spine in five patients, the thoracic spine in 12, and the conus medullaris in three patients. Of the 20 AVFs, three were fed by the anterior Spinal Artery only, three by the Posterior Spinal Artery, and 14 by both the anterior and Posterior Spinal arteries. Nine patients had varices that compressed the Spinal cord. Eleven patients underwent surgery, and nine patients underwent surgery combined with adjuvant preoperative embolization. Preoperative embolization remarkably reduced blood flow through the AVFs and facilitated subsequent surgical procedures. Postoperative angiography revealed complete disappearance of the AVFs in 16 patients. However, small fistulas persisted in the other four patients, whose large lesions were fed by the anterior Spinal Artery. Postoperatively, neurological status was improved in 11 patients, unchanged in eight, and worse in one patient. Conclusions. Effective interruption of a Spinal arteriovenous shunt was achieved by surgery in all cases, even when the anterior Spinal Artery was involved. For large and high-flow AVFs, embolization proved to be a useful adjunct to surgery.

  • Results of the surgical treatment of perimedullary arteriovenous fistulas with special reference to embolization
    Neurosurgical Focus, 1998
    Co-Authors: K Hida, Yoshinobu Iwasaki, K Goto, K Miyasaka, H Abe
    Abstract:

    This retrospective study was performed to evaluate the results of surgical treatment and the use of preoperative embolization in managing perimedullary arteriovenous fistulas (AVFs). The authors studied 20 consecutive patients with perimedullary AVFs who underwent surgical treatment. Arteriovenous shunts were at the level of the cervical spine in five patients, the thoracic spine in 12, and the conus medullaris in three patients. Of the 20 AVFs, three were fed by the anterior Spinal Artery only, three by the Posterior Spinal Artery, and 14 by both the anterior and Posterior Spinal arteries. Nine patients had varices that compressed the Spinal cord. Eleven patients underwent surgery alone, and 9 patients underwent surgery combined with adjuvant preoperative embolization. Preoperative embolization remarkably reduced the blood flow through AVFs and facilitated subsequent surgical procedures. Postoperative angiography revealed complete disappearance of the AVF in 16 patients. However, small fistulas persisted in the other four patients whose large lesions were fed by the anterior Spinal Artery. Neurological status was improved in 11 patients, unchanged in eight, and worse in one patient postsurgery. Effective interruption of a Spinal AV shunt was obtained by surgery in all cases, even when the anterior Spinal Artery was involved. For large and high-flow AVFs, embolization proved to be a useful adjunct to surgery.

K Miyasaka - One of the best experts on this subject based on the ideXlab platform.

  • Results of the surgical treatment of perimedullary arteriovenous fistulas with special reference to embolization.
    Journal of neurosurgery, 1999
    Co-Authors: K Hida, Y Iwasaki, K Goto, K Miyasaka, H Abe
    Abstract:

    This retrospective study was performed to evaluate the results of surgical treatment and the use of preoperative embolization in managing patients with perimedullary arteriovenous fistulas (AVFs). The authors studied 20 consecutive patients with perimedullary AVFs who underwent surgical treatment. Arteriovenous shunts were at the level of the cervical spine in five patients, the thoracic spine in 12, and the conus medullaris in three patients. Of the 20 AVFs, three were fed by the anterior Spinal Artery only, three by the Posterior Spinal Artery, and 14 by both the anterior and Posterior Spinal arteries. Nine patients had varices that compressed the Spinal cord. Eleven patients underwent surgery, and nine patients underwent surgery combined with adjuvant preoperative embolization. Preoperative embolization remarkably reduced blood flow through the AVFs and facilitated subsequent surgical procedures. Postoperative angiography revealed complete disappearance of the AVFs in 16 patients. However, small fistulas persisted in the other four patients, whose large lesions were fed by the anterior Spinal Artery. Postoperatively, neurological status was improved in 11 patients, unchanged in eight, and worse in one patient. Effective interruption of a Spinal arteriovenous shunt was achieved by surgery in all cases, even when the anterior Spinal Artery was involved. For large and high-flow AVFs, embolization proved to be a useful adjunct to surgery.

  • Results of the surgical treatment of perimedullary arteriovenous fistulas with special reference to embolization
    Journal of Neurosurgery: Spine, 1999
    Co-Authors: K Hida, Yoshinobu Iwasaki, K Goto, K Miyasaka, H Abe
    Abstract:

    Object. This retrospective study was performed to evaluate the results of surgical treatment and the use of preoperative embolization in managing patients with perimedullary arteriovenous fistulas (AVFs). Methods. The authors studied 20 consecutive patients with perimedullary AVFs who underwent surgical treatment. Arteriovenous shunts were at the level of the cervical spine in five patients, the thoracic spine in 12, and the conus medullaris in three patients. Of the 20 AVFs, three were fed by the anterior Spinal Artery only, three by the Posterior Spinal Artery, and 14 by both the anterior and Posterior Spinal arteries. Nine patients had varices that compressed the Spinal cord. Eleven patients underwent surgery, and nine patients underwent surgery combined with adjuvant preoperative embolization. Preoperative embolization remarkably reduced blood flow through the AVFs and facilitated subsequent surgical procedures. Postoperative angiography revealed complete disappearance of the AVFs in 16 patients. However, small fistulas persisted in the other four patients, whose large lesions were fed by the anterior Spinal Artery. Postoperatively, neurological status was improved in 11 patients, unchanged in eight, and worse in one patient. Conclusions. Effective interruption of a Spinal arteriovenous shunt was achieved by surgery in all cases, even when the anterior Spinal Artery was involved. For large and high-flow AVFs, embolization proved to be a useful adjunct to surgery.

  • Results of the surgical treatment of perimedullary arteriovenous fistulas with special reference to embolization
    Neurosurgical Focus, 1998
    Co-Authors: K Hida, Yoshinobu Iwasaki, K Goto, K Miyasaka, H Abe
    Abstract:

    This retrospective study was performed to evaluate the results of surgical treatment and the use of preoperative embolization in managing perimedullary arteriovenous fistulas (AVFs). The authors studied 20 consecutive patients with perimedullary AVFs who underwent surgical treatment. Arteriovenous shunts were at the level of the cervical spine in five patients, the thoracic spine in 12, and the conus medullaris in three patients. Of the 20 AVFs, three were fed by the anterior Spinal Artery only, three by the Posterior Spinal Artery, and 14 by both the anterior and Posterior Spinal arteries. Nine patients had varices that compressed the Spinal cord. Eleven patients underwent surgery alone, and 9 patients underwent surgery combined with adjuvant preoperative embolization. Preoperative embolization remarkably reduced the blood flow through AVFs and facilitated subsequent surgical procedures. Postoperative angiography revealed complete disappearance of the AVF in 16 patients. However, small fistulas persisted in the other four patients whose large lesions were fed by the anterior Spinal Artery. Neurological status was improved in 11 patients, unchanged in eight, and worse in one patient postsurgery. Effective interruption of a Spinal AV shunt was obtained by surgery in all cases, even when the anterior Spinal Artery was involved. For large and high-flow AVFs, embolization proved to be a useful adjunct to surgery.

K Goto - One of the best experts on this subject based on the ideXlab platform.

  • Results of the surgical treatment of perimedullary arteriovenous fistulas with special reference to embolization.
    Journal of neurosurgery, 1999
    Co-Authors: K Hida, Y Iwasaki, K Goto, K Miyasaka, H Abe
    Abstract:

    This retrospective study was performed to evaluate the results of surgical treatment and the use of preoperative embolization in managing patients with perimedullary arteriovenous fistulas (AVFs). The authors studied 20 consecutive patients with perimedullary AVFs who underwent surgical treatment. Arteriovenous shunts were at the level of the cervical spine in five patients, the thoracic spine in 12, and the conus medullaris in three patients. Of the 20 AVFs, three were fed by the anterior Spinal Artery only, three by the Posterior Spinal Artery, and 14 by both the anterior and Posterior Spinal arteries. Nine patients had varices that compressed the Spinal cord. Eleven patients underwent surgery, and nine patients underwent surgery combined with adjuvant preoperative embolization. Preoperative embolization remarkably reduced blood flow through the AVFs and facilitated subsequent surgical procedures. Postoperative angiography revealed complete disappearance of the AVFs in 16 patients. However, small fistulas persisted in the other four patients, whose large lesions were fed by the anterior Spinal Artery. Postoperatively, neurological status was improved in 11 patients, unchanged in eight, and worse in one patient. Effective interruption of a Spinal arteriovenous shunt was achieved by surgery in all cases, even when the anterior Spinal Artery was involved. For large and high-flow AVFs, embolization proved to be a useful adjunct to surgery.

  • Results of the surgical treatment of perimedullary arteriovenous fistulas with special reference to embolization
    Journal of Neurosurgery: Spine, 1999
    Co-Authors: K Hida, Yoshinobu Iwasaki, K Goto, K Miyasaka, H Abe
    Abstract:

    Object. This retrospective study was performed to evaluate the results of surgical treatment and the use of preoperative embolization in managing patients with perimedullary arteriovenous fistulas (AVFs). Methods. The authors studied 20 consecutive patients with perimedullary AVFs who underwent surgical treatment. Arteriovenous shunts were at the level of the cervical spine in five patients, the thoracic spine in 12, and the conus medullaris in three patients. Of the 20 AVFs, three were fed by the anterior Spinal Artery only, three by the Posterior Spinal Artery, and 14 by both the anterior and Posterior Spinal arteries. Nine patients had varices that compressed the Spinal cord. Eleven patients underwent surgery, and nine patients underwent surgery combined with adjuvant preoperative embolization. Preoperative embolization remarkably reduced blood flow through the AVFs and facilitated subsequent surgical procedures. Postoperative angiography revealed complete disappearance of the AVFs in 16 patients. However, small fistulas persisted in the other four patients, whose large lesions were fed by the anterior Spinal Artery. Postoperatively, neurological status was improved in 11 patients, unchanged in eight, and worse in one patient. Conclusions. Effective interruption of a Spinal arteriovenous shunt was achieved by surgery in all cases, even when the anterior Spinal Artery was involved. For large and high-flow AVFs, embolization proved to be a useful adjunct to surgery.

  • Results of the surgical treatment of perimedullary arteriovenous fistulas with special reference to embolization
    Neurosurgical Focus, 1998
    Co-Authors: K Hida, Yoshinobu Iwasaki, K Goto, K Miyasaka, H Abe
    Abstract:

    This retrospective study was performed to evaluate the results of surgical treatment and the use of preoperative embolization in managing perimedullary arteriovenous fistulas (AVFs). The authors studied 20 consecutive patients with perimedullary AVFs who underwent surgical treatment. Arteriovenous shunts were at the level of the cervical spine in five patients, the thoracic spine in 12, and the conus medullaris in three patients. Of the 20 AVFs, three were fed by the anterior Spinal Artery only, three by the Posterior Spinal Artery, and 14 by both the anterior and Posterior Spinal arteries. Nine patients had varices that compressed the Spinal cord. Eleven patients underwent surgery alone, and 9 patients underwent surgery combined with adjuvant preoperative embolization. Preoperative embolization remarkably reduced the blood flow through AVFs and facilitated subsequent surgical procedures. Postoperative angiography revealed complete disappearance of the AVF in 16 patients. However, small fistulas persisted in the other four patients whose large lesions were fed by the anterior Spinal Artery. Neurological status was improved in 11 patients, unchanged in eight, and worse in one patient postsurgery. Effective interruption of a Spinal AV shunt was obtained by surgery in all cases, even when the anterior Spinal Artery was involved. For large and high-flow AVFs, embolization proved to be a useful adjunct to surgery.

Heawoon Park - One of the best experts on this subject based on the ideXlab platform.

  • ipsilateral Posterior Spinal Artery infarction on lower medulla and upper cervical Spinal cord a case report
    Annals of Rehabilitation Medicine, 2010
    Co-Authors: Insoon Kang, Jeonggu Kwon, Sunguk Lee, Heawoon Park
    Abstract:

    Spinal cord infarction is uncommon and accounts for only 1% of all strokes in comparison with cerebral infarction. Furthermore, Posterior Spinal cord infarction is particularly rare because of an anastomotic network of direct penetrating vessels and plexus of pial vessels fed by the paired Posterior Spinal arteries. We report a case of unilateral Posterior Spinal Artery infarction on lower medulla and upper cervical Spinal cord in a patient of 60-year-old woman. She complained of continuous headache for several weeks and suddenly presented right facial paresthesia, slow progression of motor weakness and proprioceptive sensory loss on right extremity, and voiding difficulty. Magnetic resonance and computed tomography imaging studies confirmed acute infarction at the right posterolateral aspect of the lower medulla and upper cervical cord (C1-2 level) with right vertebral Artery hypoplasia. Transcranial doppler sonography also showed right vertebral Artery hypoplasia rather than stenosis with atherosclerosis.