J.Jpn. Surg. Soc.. 60(7): 1101-1116, 1959

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A STUDY ON THE CHANGES IN THE CIRCULATORY SYSTEM SEEN SHORTLY AFTER THE TRAUMA OF THE HEAD

By using rabbits, the author conducted experiments to study the pathological changes of the circulatory system seen shortly after the trauma of the head, particulary cardiac function centered around the changes in blood pressure and rhythm of the heart-beat, and obtained the following interesting results:
1) Blood pressure is seen to rise conspicuously immediately after the head trauma.This is believed to be due to masked contraction of the peripheral blood vessels caused by tonic convulsion that takes place immediately after the trauma.
2) The rhythm of the heat-beat shows a marked irregularity for a short period of time immediately after the head trauma. This takes the form of a marked intermission between the beats followed by arhythmic bradicardy. This irregularity of the heart-beat is believed to be the effect of the vagal nerve without the intermediary of the c cerebrum.
(author's abstract)

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