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Assessment of Cerebral Blood Flow Velocities in Pre and Post Angiographic States with Transcranial Doppler
Ist Teil von
Neurology India, 2003-05, Vol.50 (4)
Ort / Verlag
India: Medknow Publications on behalf of the Neurological Society of India
Erscheinungsjahr
2003
Link zum Volltext
Quelle
EZB-FREE-00999 freely available EZB journals
Beschreibungen/Notizen
The frequency of complications resulting from angiograms reported in
the literature vary between 0.2-5 percent. This study was planned to
determine the changes in cerebral blood flow velocity before and after
angiography, using transcranial doppler in patients of subarachnoid
hemorrhage (SAH) undergoing angiographies. Thirty patients with
subarachnoid hemorrhage underwent transcranial doppler ultrasonography
immediately before and after angiography. Nonionic water-soluble agents
were used during the angiograms. The mean flow velocity (MFV) and
pulsatility index (PI) at the M1 segment of both middle cerebral
arteries was simultaneously measured. When the patients (11 male, 19
female, mean age±SD; 52.45±12.06) were compared according to
changes in MFV and PI, pre and post-angiography, there was no
statistical difference in MFV (p=0.51 and p=0.99, left and right side
respectively), and in PI (p=0.48 and p=0.66) pre and post angiography.
Although angiogram can be used to detect vasospasm in SAH, it can also
be cause of vasospasm, partially due to the effect of the contrast
agent on the cerebral arteries. This study proposes that the
angiographic method is still safe and TCD can be used to follow up any
possible changes in diameter of cerebral arteries before and after
angiography.