Stroke; a journal of cerebral circulation
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Comparative Study
Reactivity of cerebral blood flow to carbon dioxide in various types of ischemic cerebrovascular disease: evaluation by the transcranial Doppler method.
The response of cerebral blood flow to changes in the arterial carbon dioxide partial pressure (i.e., carbon dioxide reactivity) has been evaluated as a parameter of cerebral perfusion reserve in patients with cerebrovascular disease. In this study, variations in this reactivity in various ischemic cerebrovascular diseases were evaluated by a newly established method, a transcranial Doppler technique. ⋯ The carbon dioxide reactivity of cerebral blood flow measured by this transcranial Doppler technique may be useful for characterizing the hemodynamic changes that occur in various types of ischemic cerebrovascular disease.
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Comparative Study
Carotid endarterectomy with transcranial Doppler and electroencephalographic monitoring. A prospective study in 130 operations.
We report the results of combined recording of hemodynamic and thromboembolic phenomena during carotid endarterectomy by means of computerized electroencephalography as well as transcranial Doppler ultrasonography. The study focuses on the additional value of transcranial Doppler to detect ischemia during surgery. ⋯ During carotid endarterectomy, transcranial Doppler immediately provides information about thromboembolism and hemodynamic changes that are not detected by electroencephalography alone. Acoustic feedback from the transcranial Doppler monitoring unit has a direct influence on the surgical technique. Transcranial Doppler ultrasound may be a useful tool in the study and prevention of intraoperative stroke.