情動的興奮時における心拍出量

概要

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The effect of emotional stress on cardiac output was studied on 5 healthy male adults, while cardiac output was determined by CO_2 rebreathing method, heart rate obtained by continuous recording of ECG, and stroke volume calculated by heart rate and cardiac outpt. For the reproduction of emotional stress has been applied electric stimulation (frequency: 50C, voltage: 50V, duration: 500 mseci to calf muscles with electrodes over the skin; and for the physical stress bicycle ergometer. Moreover, work load was adjusted so that the heart rate increased to the same level as was increased by the emotional stress. Based upon this studies we established that : a) Heart rate at rest increased on an average 33% lasting for 3 or 4 minutes. b) The mean value of heart rate was 68beats/min at rest, 90beats/min under emotional stress and 93beats/min during work. c) The mean value of cardiac output was 5.2l/min at rest, 5.5l/mm under emotional stress and 10.4l/min during work. d) The mean value of stroke volume was 77ml/beat at rest, 61 ml/beat under emotional stress and 110ml/beat during work. Thus, since cardiac cutout under emotional stress was on an average 53% of the value during work under the same level of heart rate, we may conclude that emotional stress effects only on the rate of heart activity, but not on the sroke volume.
東京大学の論文
1974-03-30