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001-es BibID:	BIBFORM039510
Első szerző:	Leányvári Zsolt (neurológus)
Cím:	Computed tomographic and transcranial Doppler sonographic findings in acute and subacute phases of middle cerebral artery strokes / Leanyvari, Z., Vastagh, I., Fulesdi, B., Szirmai, I., Lengyel, A., Csiba, L., Bereczki, D.
Dátum:	2002
ISSN:	0091-2751
Megjegyzések:	The aim of this study was to compare the sensitivities of visual and densitometric analyses of CT scans and transcranial Doppler sonograms (TCD) in detecting early changes in acute stroke. METHODS: CT and TCD were each performed twice in 12 patients; first in the acute phase (within 28 hours of stroke onset), then in the subacute phase (mean +/- standard deviation, 6 +/- 3 days after onset) of a stroke. Hypodensity on the CT scans was evaluated visually, and the optical density of both the stroke region and the corresponding region on the unaffected side was measured. Measurement of flow parameters in the middle cerebral artery was carried out with TCD before or shortly (within 4 hours) after CT scanning. RESULTS: In the acute phase, blood flow velocities were significantly lower on the affected side than they were on the unaffected side (means, 42 +/- 13 and 55 +/- 25 cm/second, respectively; p = 0.012). Marked asymmetry in flow velocity was found in 3 of the 4 patients who had normal CT scans in the acute phase. The asymmetry in flow velocity disappeared by the sixth day after the stroke. The resistance index did not correlate with the final infarct size. CONCLUSIONS: In some patients, the use of TCD in acute stroke may show alterations that reflect tissue damage that is undetectable on CT. Therefore, CT and TCD should be considered complementary diagnostic tools in the acute phase of stroke.
Tárgyszavak:	Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:	Journal Of Clinical Ultrasound. - 30 : 1 (2002), p. 33-37. -
További szerzők:	Vastagh Ildikó Fülesdi Béla (1961-) (aneszteziológus) Szirmai Imre Lengyel András (1970-) (neurológus) Csiba László (1952-) (neurológus, pszichiáter) Bereczki Dániel (1960-) (neurológus)
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001-es BibID:	BIBFORM029278
Első szerző:	Settakis, George
Cím:	Transcranial Doppler study of the cerebral hemodynamic changes during breath-holding and hyperventilation tests / Settakis, G., Lengyel, A., Molnar, C., Bereczki, D., Csiba, L., Fulesdi, B.
Dátum:	2002
ISSN:	1051-2284
Megjegyzések:	The aim of the present study was to assess the time course of hyperventilation (HV) and breath-holding (BH) tests in healthy volunteers. SUBJECTS AND METHODS: Young healthy volunteers (n = 29) underwent continuous registration of the middle cerebral artery mean blood flow velocity (MCAV) during and after 30 seconds of BH and 60 seconds of HV. Absolute values as well as percentage changes of the MCAV are reported. In 13 subjects, determination of capillary blood gas parameters (pH, pCO2, pO2, and O2 saturation) was performed before tests, after BH and after HV. RESULTS: MCAV during 30 seconds of breath-holding starts to increase after 10 seconds and reaches its highest level at 30 seconds. After breathing normally, MCAV normalizes within 30 seconds. Hyper-ventilation results in a decrease in MCAV, which reaches a plateau at 20 to 30 seconds after starting to hyperventilate, and blood flow velocity did not change significantly any further until the end of the procedure. The normalization of the MCAV is incomplete at 30 seconds after finishing hyperventilation. None of the capillary blood gases changed significantly after breath-holding, whereas capillary pH, pO2, and oxygen saturation increased and pCO2 decreased after hyperventilation. No relationship was found between capillary blood gas parameters and MCAV values. CONCLUSIONS: The authors concluded that breath-holding and hyperventilation tests seem to be a practical alternative to acetazolamide and the CO2 inhalation method in the assessment of cerebral hemodynamics.
Tárgyszavak:	Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban egyetemen (Magyarországon) készült közlemény
Megjelenés:	Journal of Neuroimaging. - 12 : 3 (2002), p. 252-258. -
További szerzők:	Lengyel András (1970-) (neurológus) Molnár Csilla (1962-) (aneszteziológus) Bereczki Dániel (1960-) (neurológus) Csiba László (1952-) (neurológus, pszichiáter) Fülesdi Béla (1961-) (aneszteziológus)
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