Middle cerebral artery blood velocity during exercise with beta-1 adrenergic and unilateral stellate ganglion blockade in humans.

@article{Ide2000MiddleCA,
  title={Middle cerebral artery blood velocity during exercise with beta-1 adrenergic and unilateral stellate ganglion blockade in humans.},
  author={Kojiro Ide and R Boushel and Helene Munk S\orensen and ana. fernandes and Yan Li Cai and Frank Christian Pott and Niels H Secher},
  journal={Acta physiologica Scandinavica},
  year={2000},
  volume={170 1},
  pages={33-8}
}
A reduced ability to increase cardiac output (CO) during exercise limits blood flow by vasoconstriction even in active skeletal muscle. Such a flow limitation may also take place in the brain as an increase in the transcranial Doppler determined middle cerebral artery blood velocity (MCA V(mean)) is attenuated during cycling with beta-1 adrenergic blockade and in patients with heart insufficiency. We studied whether sympathetic blockade at the level of the neck (0.1% lidocaine; 8 mL; n=8… CONTINUE READING

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