Changes of blood flow velocity indicating mechanical compression of the vertebral arteries during rotation of the head in the normal human measured with transcranial Doppler sonography
The dynamical changes of blood flow velocity of the intracranial vertebral arteries (VA's) and proximal basilar artery (BA) provoked by rotation of the head in normal volunteers were measured using pulsed-wave transcranial Doppler sonography (TCD). In another group both VA's were examined...
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| Format: | Article |
| Language: | English |
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Academia Brasileira de Neurologia (ABNEURO)
1995-03-01
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| Series: | Arquivos de Neuro-Psiquiatria |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0004-282X1995000100005&lng=en&tlng=en |
| _version_ | 1811195424354074624 |
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| author | Sandro Rossiti Reinhard Volkmann |
| author_facet | Sandro Rossiti Reinhard Volkmann |
| author_sort | Sandro Rossiti |
| collection | DOAJ |
| description | The dynamical changes of blood flow velocity of the intracranial vertebral arteries (VA's) and proximal basilar artery (BA) provoked by rotation of the head in normal volunteers were measured using pulsed-wave transcranial Doppler sonography (TCD). In another group both VA's were examined simultaneously with 2-channel TCD. Blood flow velocities diminished compared to the neutral position in all vessels, independently of die side. Total obstruction of the flow was not observed. Our findings reveal a definitive decrease of blood flow velocity at the vertebrobasilar artery system provoked by rotation of the head in normal humans. This physiological phenomenon is suggested to have an impact on the cerebral blood flow in patients with impaired autoregulation of the cerebral vessels, low volume flow reserve in the contralateral VA or insufficient collateral channels because of normal anatomical variation, especially those patients under general anesthesia or comatose. |
| first_indexed | 2024-04-12T00:43:05Z |
| format | Article |
| id | doaj.art-a363b6f6c03242a9b5057b79b9a3a8fc |
| institution | Directory Open Access Journal |
| issn | 1678-4227 |
| language | English |
| last_indexed | 2024-04-12T00:43:05Z |
| publishDate | 1995-03-01 |
| publisher | Academia Brasileira de Neurologia (ABNEURO) |
| record_format | Article |
| series | Arquivos de Neuro-Psiquiatria |
| spelling | doaj.art-a363b6f6c03242a9b5057b79b9a3a8fc2022-12-22T03:54:57ZengAcademia Brasileira de Neurologia (ABNEURO)Arquivos de Neuro-Psiquiatria1678-42271995-03-01531263310.1590/S0004-282X1995000100005S0004-282X1995000100005Changes of blood flow velocity indicating mechanical compression of the vertebral arteries during rotation of the head in the normal human measured with transcranial Doppler sonographySandro Rossiti0Reinhard Volkmann1Göteborg UniveristySahlgrenska University HospitalThe dynamical changes of blood flow velocity of the intracranial vertebral arteries (VA's) and proximal basilar artery (BA) provoked by rotation of the head in normal volunteers were measured using pulsed-wave transcranial Doppler sonography (TCD). In another group both VA's were examined simultaneously with 2-channel TCD. Blood flow velocities diminished compared to the neutral position in all vessels, independently of die side. Total obstruction of the flow was not observed. Our findings reveal a definitive decrease of blood flow velocity at the vertebrobasilar artery system provoked by rotation of the head in normal humans. This physiological phenomenon is suggested to have an impact on the cerebral blood flow in patients with impaired autoregulation of the cerebral vessels, low volume flow reserve in the contralateral VA or insufficient collateral channels because of normal anatomical variation, especially those patients under general anesthesia or comatose.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0004-282X1995000100005&lng=en&tlng=enartéria basilardoença cerebrovascularhemodinãmicacuidado intra-operatórioposturaictosonografiaDoppler transcranianoultrassomartéria vertebralinsuficiência vertebrobasilar |
| spellingShingle | Sandro Rossiti Reinhard Volkmann Changes of blood flow velocity indicating mechanical compression of the vertebral arteries during rotation of the head in the normal human measured with transcranial Doppler sonography Arquivos de Neuro-Psiquiatria artéria basilar doença cerebrovascular hemodinãmica cuidado intra-operatório postura icto sonografia Doppler transcraniano ultrassom artéria vertebral insuficiência vertebrobasilar |
| title | Changes of blood flow velocity indicating mechanical compression of the vertebral arteries during rotation of the head in the normal human measured with transcranial Doppler sonography |
| title_full | Changes of blood flow velocity indicating mechanical compression of the vertebral arteries during rotation of the head in the normal human measured with transcranial Doppler sonography |
| title_fullStr | Changes of blood flow velocity indicating mechanical compression of the vertebral arteries during rotation of the head in the normal human measured with transcranial Doppler sonography |
| title_full_unstemmed | Changes of blood flow velocity indicating mechanical compression of the vertebral arteries during rotation of the head in the normal human measured with transcranial Doppler sonography |
| title_short | Changes of blood flow velocity indicating mechanical compression of the vertebral arteries during rotation of the head in the normal human measured with transcranial Doppler sonography |
| title_sort | changes of blood flow velocity indicating mechanical compression of the vertebral arteries during rotation of the head in the normal human measured with transcranial doppler sonography |
| topic | artéria basilar doença cerebrovascular hemodinãmica cuidado intra-operatório postura icto sonografia Doppler transcraniano ultrassom artéria vertebral insuficiência vertebrobasilar |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0004-282X1995000100005&lng=en&tlng=en |
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