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Transcranial Doppler sonography follow-up study in mild vascular cognitive impairment.
PLoS One
January 2025
Department of Medical and Surgical Sciences and Advanced Technologies "G. F. Ingrassia", University of Catania, Catania, Italy.
Background: To date, few data to transcranial Doppler sonography (TCD) are available in patients with mild vascular cognitive impairment (VCI) at risk for vascular or mixed dementia. In a previous study in patients with mild VCI and cerebral small vessels disease, a hemodynamic pattern of cerebral hypoperfusion and enhanced vascular resistance were observed; however, longitudinal data are currently lacking. Here, we perform a clinical, psychopathological, and neurosonological follow-up of patients with VCI in order to monitor any progression and to identify TCD measures to detect it.
View Article and Find Full Text PDFEvaluation of contralateral arterial flow compensation using transcranial Doppler in acute internal carotid artery occlusion and implications for neurological outcome.
Sci Rep
January 2025
Department of Neurology, Inner Mongolia Autonomous Region People's Hospital, Hohhot, China.
Acute internal carotid artery occlusion (AICAO) can result in malignant cerebral edema and unfavorable patient outcomes. This study evaluated the utility of transcranial Doppler (TCD) in assessing contralateral flow compensation and predicting outcomes in patients with AICAO. We enrolled 51 patients within 6 h of symptom onset and conducted TCD examinations to evaluate collateral circulation.
View Article and Find Full Text PDFThe Influence of Sex, Fitness, BMI, and Cardiovascular Risk Factors on Cerebral Blood Velocity Responsiveness to Graded Exercise Testing in Middle-Aged Adults.
J Gerontol A Biol Sci Med Sci
December 2024
GENUD Toledo Research Group, Faculty of Sport Sciences, University of Castilla-La Mancha, Toledo, Spain.
Mean middle cerebral artery velocity (MCAv) and the pulsatility index (PI), at rest and in response to exercise, are important markers of cerebrovascular health status in middle-aged adults, when vascular decline assumes substantial relevance. Thus, this study aimed to describe and compare the responses of MCAv and PI to incremental exercise. Two hundred and forty-eight volunteers (50-58 years, 55% women) completed a ramp test on a cycle-ergometer.
View Article and Find Full Text PDFTranscranial Doppler Arterial Pressure Gradient Is Associated With Delayed Infarction After Subarachnoid Hemorrhage.
J Neuroimaging
January 2025
Department of Neurology, Georgetown University School of Medicine, Washington, District of Columbia, USA.
Article Synopsis
- The study investigates the significance of the pulsatility index (PI) from transcranial Doppler (TCD) in predicting delayed cerebral infarction (DCI) in patients with aneurysmal subarachnoid hemorrhage (SAH) despite its lack of endorsement in current guidelines.
- Elevated arterial pressure gradient (ΔP) calculated from PI showed a significant association with DCI, while mean cerebral blood flow velocity (mCBFV) was linked to vasospasm but not DCI.
- The findings suggest that TCD-estimated ΔP could be a valuable predictor for DCI in SAH patients, highlighting its potential impact on long-term functional outcomes.
Does age, sex, and area of substantia nigra echogenicity predict the MRI appearance of nigrosome-1?
J Neurol Sci
February 2025
UniSA Clinical & Health Sciences and Alliance for Research in Exercise, Nutrition and Activity (ARENA), City East Campus, University of South Australia, GPO Box 2471, Adelaide, South Australia 5001, Australia. Electronic address:
The appearance of the substantia nigra (SN) can aid diagnosis of Parkinson's disease (PD). The effect of age and sex on the appearance of nigrosome-1 (SN subregion) on magnetic resonance imaging (MRI), and the relationship between nigrosome-1 (viewed with MRI) and SN echogenicity (viewed with transcranial ultrasound) is unknown. The study aimed to address these knowledge gaps.
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