scholarly journals Correlation of Continuous Electroencephalograms With Cerebral Blood Flow Measurements During Carotid Endarterectomy

Stroke ◽  
1973 ◽  
Vol 4 (4) ◽  
pp. 674-683 ◽  
Author(s):  
FRANK W. SHARBROUGH ◽  
JOSEPH M. MESSICK ◽  
THORALF M. SUNDT
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Carotid Endarterectomy ◽  
Flow Measurements ◽  
Blood Flow Measurements

Cerebral blood flow measurements and electroencephalograms during carotid endarterectomy

1974 ◽  
Vol 41 (3) ◽  
pp. 310-320 ◽  
Author(s):  
Thoralf M. Sundt ◽  
Frank W. Sharbrough ◽  
Robert E. Anderson ◽  
John D. Michenfelder
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Carotid Endarterectomy ◽  
Carbon Dioxide Tension ◽  
Initial Slope ◽  
Flow Measurements ◽  
Content Type ◽  
Blood Flow Measurements ◽  
Electroencephalogram Eeg ◽  
Fine Print

✓ Ninety-three endarterectomies for carotid stenosis were monitored with cerebral blood flow (CBF) measurements, and 113 with both CBF measurements and a continuous electroencephalogram (EEG). Significant CBF increase occurred only when carotid endarterectomy was for a stenosis greater than 90%. A high correlation between CBF and EEG indicated when a shunt was required. To sustain a normal EEG, the CBF ascertained by the initial slope technique must be 18 ml/100 gm/min at an arterial carbon dioxide tension (PaCO2) of 40 torr. The degree of EEG change below this level during occlusion reflected the severity of reduced blood flow and was reversible with replacement of a shunt. The value and limitations of these monitoring techniques and a concept of ischemic tolerance and critical CBF are discussed.

Cerebral blood flow measurements and electroencephalograms during carotid endarterectomy.

2007 ◽  
Vol 107 (4) ◽  
pp. 887-897 ◽  
Author(s):  
Thoralf M. Sundt ◽  
Frank W. Sharbrough ◽  
Robert E. Anderson ◽  
John D. Michenfelder
Keyword(s):  
Carbon Dioxide ◽  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Carotid Endarterectomy ◽  
Carbon Dioxide Tension ◽  
Initial Slope ◽  
Arterial Carbon Dioxide Tension ◽  
Flow Measurements ◽  
Blood Flow Measurements ◽  
Electroencephalogram Eeg

✓ Ninety-three endarterectomies for carotid stenosis were monitored with cerebral blood flow (CBF) measurements, and 113 with both CBF measurements and a continuous electroencephalogram (EEG). Significant CBF increase occurred only when carotid endarterectomy was for a stenosis greater than 90%. A high correlation between CBF and EEG indicated when a shunt was required. To sustain a normal EEG, the CBF ascertained by the initial slope technique must be 18 ml/100 gm/min at an arterial carbon dioxide tension (PaCO2) of 40 torr. The degree of EEG change below this level during occlusion reflected the severity of reduced blood flow and was reversible with replacement of a shunt. The value and limitations of these monitoring techniques and a concept of ischemic tolerance and critical CBF are discussed.

CEREBRAL BLOOD FLOW MEASUREMENTS AND ELECTROENCEPHALOGRAMS DURING CAROTID ENDARTERECTOMY

1975 ◽  
Vol 19 (4) ◽  
pp. 321
Author(s):  
T. M. SUNDT ◽  
F. W. SHARBROUGH ◽  
R. E. ANDERSON ◽  
J. D. MICHENFELDER
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Carotid Endarterectomy ◽  
Flow Measurements ◽  
Blood Flow Measurements

Clinical Utility of Quantitative Cerebral Blood Flow Measurements during Internal Carotid Artery Test Occlusions

Neurosurgery ◽  
2002 ◽  
Vol 50 (5) ◽  
pp. 996-1005 ◽  
Author(s):  
Randolph S. Marshall ◽  
Ronald M. Lazar ◽  
William L. Young ◽  
Robert A. Solomon ◽  
Shailendra Joshi ◽  
...  
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Clinical Utility ◽  
Internal Carotid ◽  
Flow Measurements ◽  
Blood Flow Measurements

Regional Cerebral Blood Flow Measurements Using the 133-Xenon Inhalation Method

1988 ◽  
pp. 121-143 ◽  
Author(s):  
G. Rodriguez ◽  
F. De Carli ◽  
G. Novellone ◽  
S. Marenco ◽  
G. Rosadini
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Regional Cerebral Blood Flow ◽  
Regional Cerebral Blood ◽  
Flow Measurements ◽  
Blood Flow Measurements

Cerebral Vasoreactivity Assessed With Transcranial Doppler and Regional Cerebral Blood Flow Measurements

Stroke ◽  
1995 ◽  
Vol 26 (12) ◽  
pp. 2302-2306 ◽  
Author(s):  
Arve Dahl ◽  
David Russell ◽  
Kjell Rootwelt ◽  
Rolf Nyberg-Hansen ◽  
Emilia Kerty
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Transcranial Doppler ◽  
Regional Cerebral Blood Flow ◽  
Regional Cerebral Blood ◽  
Flow Measurements ◽  
Blood Flow Measurements ◽  
Cerebral Vasoreactivity

scholarly journals Improved brain perfusion after electrical cardioversion of atrial fibrillation

EP Europace ◽  
2019 ◽  
Vol 22 (4) ◽  
pp. 530-537 ◽  
Author(s):  
Marianna Gardarsdottir ◽  
Sigurdur Sigurdsson ◽  
Thor Aspelund ◽  
Valdis Anna Gardarsdottir ◽  
Lars Forsberg ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Atrial Fibrillation ◽  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Magnetic Resonance ◽  
Brain Perfusion ◽  
Resonance Imaging ◽  
Flow Measurements ◽  
Before And After ◽  
Blood Flow Measurements

Abstract Aims Atrial fibrillation (AF) has been associated with reduced brain volume, cognitive impairment, and reduced cerebral blood flow. The causes of reduced cerebral blood flow in AF are unknown, but no reduction was seen in individuals without the arrhythmia in a previous study. The aim of this study was to test the hypothesis that brain perfusion, measured with magnetic resonance imaging (MRI), improves after cardioversion of AF to sinus rhythm (SR). Methods and results All patients undergoing elective cardioversion at our institution were invited to participate. A total of 44 individuals were included. Magnetic resonance imaging studies were done before and after cardioversion with both brain perfusion and cerebral blood flow measurements. However, 17 did not complete the second MRI as they had a recurrence of AF during the observation period (recurrent AF group), leaving 17 in the SR group and 10 in the AF group to complete both measurements. Brain perfusion increased after cardioversion to SR by 4.9 mL/100 g/min in the whole brain (P < 0.001) and by 5.6 mL/100 g/min in grey matter (P < 0.001). Cerebral blood flow increased by 58.6 mL/min (P < 0.05). Both brain perfusion and cerebral blood flow remained unchanged when cardioversion was unsuccessful. Conclusion In this study of individuals undergoing elective cardioversion for AF, restoration, and maintenance of SR for at least 10 weeks after was associated with an improvement of brain perfusion and cerebral blood flow measured by both arterial spin labelling and phase contrast MRI. In those individuals where cardioversion was unsuccessful, there was no change in perfusion or blood flow.

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