出版社：Japan Society of Physical Education, Health and Sport Sciences
摘要：In order to find out circulatory adjustment to elevation of the intra-thoracic pressure, the author employed the method of Burger's Test with the pressure of 40mmHg and the duration of 30 seconds. 13 normal subjects were examined (6 swimmers and 6 untrained), 5 physically feeble subjects and a subjects who had fainted while swimming. The results were as follows. In the cases of swimmers and untrained, the blood pressure increased during the elevation of intra-thoracic pressure and returned to its normal level earlier in the former after the release of pressure. The pulsee waves (both of amplitude and wave area) of swimmers during the elevation of intra-thoracic pressure were larger than that of the untrained. Heart figures of the swimmers during elevation of intra-thoracic pressure diminished in size, but to less degree compared with that of the untrained. The test results of 5 physically feeble subjects showed no remarkable variations in comparison with 12 normal subjects. In the case of the subject who had fainted while swimming, the blood pressure was inmeasurably low, owing to diminution of vascular tone. Pulse rate was extre-mely frequent (170/min. measured by means of E.C.G.). Heart figure also extremely diminished. It is worth mentioning that he showed normal tests results except for Burgejs Test. The author concluds that owing to the lack of cardiovascular adjustment, some persons will be dangerouos conditions when intra-thoracic pressure is increased, even though no apparent cardiovascular disorders are discovered at rest.
其他摘要：In order to find out circulatory adjustment to elevation of the intra-thoracic pressure, the author employed the method of Burger's Test with the pressure of 40mmHg and the duration of 30 seconds. 13 normal subjects were examined (6 swimmers and 6 untrained), 5 physically feeble subjects and a subjects who had fainted while swimming. The results were as follows. In the cases of swimmers and untrained, the blood pressure increased during the elevation of intra-thoracic pressure and returned to its normal level earlier in the former after the release of pressure. The pulsee waves (both of amplitude and wave area) of swimmers during the elevation of intra-thoracic pressure were larger than that of the untrained. Heart figures of the swimmers during elevation of intra-thoracic pressure diminished in size, but to less degree compared with that of the untrained. The test results of 5 physically feeble subjects showed no remarkable variations in comparison with 12 normal subjects. In the case of the subject who had fainted while swimming, the blood pressure was inmeasurably low, owing to diminution of vascular tone. Pulse rate was extre-mely frequent (170/min. measured by means of E.C.G.). Heart figure also extremely diminished. It is worth mentioning that he showed normal tests results except for Burgejs Test. The author concluds that owing to the lack of cardiovascular adjustment, some persons will be dangerouos conditions when intra-thoracic pressure is increased, even though no apparent cardiovascular disorders are discovered at rest.
