99mTc-HMPAO-SPECT with acetazolamide challenge to detect hemodynamic compromise in occlusive cerebrovascular disease.
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99mTc-HMPAO-SPECT with acetazolamide challenge to detect hemodynamic compromise in occlusive cerebrovascular disease. / Knop, J; Thie, A; Fuchs, C; Siepmann, G; Zeumer, Hermann.
In: STROKE, Vol. 23, No. 12, 12, 1992, p. 1733-1742.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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T1 - 99mTc-HMPAO-SPECT with acetazolamide challenge to detect hemodynamic compromise in occlusive cerebrovascular disease.
AU - Knop, J
AU - Thie, A
AU - Fuchs, C
AU - Siepmann, G
AU - Zeumer, Hermann
PY - 1992
Y1 - 1992
N2 - BACKGROUND AND PURPOSE: Insufficiency of collateral supply may lead to low-flow infarcts in severe occlusive cerebrovascular disease. The aim of this study was to evaluate the feasibility of technetium-99m-labeled hexamethylpropyleneamine oxime (99mTc-HMPAO) single-photon emission computed tomography (SPECT) to assess hemodynamic compromise in the anterior circulation. METHODS: Cerebral blood flow before and after 1 g acetazolamide was analyzed by 99mTc-HMPAO-SPECT in 21 symptomatic patients with documented extracranial obstructions. SPECT findings were correlated with the results of angiography, transcranial Doppler sonography, and computed tomographic scan. RESULTS: The acetazolamide-induced increase of cerebral blood flow could be reliably monitored by increase of cerebral 99mTc-HMPAO uptake, which varied between 11.4% and 47.6% in the less-affected hemisphere. Increment of hemispheric side-to-side asymmetry of tracer uptake after drug challenge revealed significant restriction of regional vasoreactivity in 11 patients. Agreement in assessing hemodynamic compromise was reached in 81% of patients with ophthalmic artery collaterals on angiography (p <0.001), in 76% with low-flow infarcts on computed tomographic scan (p <0.01), and in 91% with markedly reduced flow velocities on transcranial Doppler (p <0.0001). One patient developed a low-flow infarct in the area predicted by SPECT during follow up. CONCLUSIONS: We conclude that 99mTc-HMPAO-SPECT with acetazolamide challenge is a useful method for assessment of the adequacy of hemispheric collateral pathways in patients with severe occlusive cerebrovascular disease.
AB - BACKGROUND AND PURPOSE: Insufficiency of collateral supply may lead to low-flow infarcts in severe occlusive cerebrovascular disease. The aim of this study was to evaluate the feasibility of technetium-99m-labeled hexamethylpropyleneamine oxime (99mTc-HMPAO) single-photon emission computed tomography (SPECT) to assess hemodynamic compromise in the anterior circulation. METHODS: Cerebral blood flow before and after 1 g acetazolamide was analyzed by 99mTc-HMPAO-SPECT in 21 symptomatic patients with documented extracranial obstructions. SPECT findings were correlated with the results of angiography, transcranial Doppler sonography, and computed tomographic scan. RESULTS: The acetazolamide-induced increase of cerebral blood flow could be reliably monitored by increase of cerebral 99mTc-HMPAO uptake, which varied between 11.4% and 47.6% in the less-affected hemisphere. Increment of hemispheric side-to-side asymmetry of tracer uptake after drug challenge revealed significant restriction of regional vasoreactivity in 11 patients. Agreement in assessing hemodynamic compromise was reached in 81% of patients with ophthalmic artery collaterals on angiography (p <0.001), in 76% with low-flow infarcts on computed tomographic scan (p <0.01), and in 91% with markedly reduced flow velocities on transcranial Doppler (p <0.0001). One patient developed a low-flow infarct in the area predicted by SPECT during follow up. CONCLUSIONS: We conclude that 99mTc-HMPAO-SPECT with acetazolamide challenge is a useful method for assessment of the adequacy of hemispheric collateral pathways in patients with severe occlusive cerebrovascular disease.
M3 - SCORING: Zeitschriftenaufsatz
VL - 23
SP - 1733
EP - 1742
JO - STROKE
JF - STROKE
SN - 0039-2499
IS - 12
M1 - 12
ER -