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Pneumatic antishock garment inflation activates the human sympathetic nervous system by abdominal compression

•  What is the central question of this study? What is the mechanism by which pneumatic antishock garments increase blood pressure? •  What is the main finding and its importance? Direct recordings of sympathetic nerve activity revealed that pneumatic antishock garments activate a sympathetically mediated reflex increase in blood pressure by compressing the abdomen, but not the leg. This mechanism has never been shown previously.