sympathicotonia

MB leads little changes of hemodynamics due to inhibit cardiac sympathicotonia and pneumogastric nerve simultaneity, but TEB brings the evident changes due to only inhibit pneumogastric nerve.

纵隔阻滞与硬膜外阻滞相比，硬膜外阻滞经，引起明显血流动力变化，而纵隔阻滞同时和迷走经，不引起明显血流动力变化。