健常男性における温浴中の心血行動態および自立神経機能の変化に関する検討

• Published in: 日本生理人類学会誌 Vol. 4; no. 3; pp. 133 - 140
• Main Authors: 平松, 伸一, 丸山, 徹, 仁保, 喜之, 藤野, 武彦, 高杉, 紳一郎, 加治, 良一, 金谷, 庄蔵
• Format: Journal Article
• Language: Japanese
• Published: 日本生理人類学会 1999; Japan Society of Physiological Anthropology
• Subjects: automic function; bathing; cardiovcascular function; electrolytes; 心血管機能; 温浴; 自律神経機能; 電解質
• ISSN: 1342-3215; 2432-0986
• DOI: 10.20718/jjpa.4.3_133

The present study was conducted to investigate the cardiovascular and autonomic responses caused by bathing with different three temperatures (i.e., 29, 35 and 40℃) in six healthy male volunteers under the continuous ECG monitoring, serial echocardiographic examination, blood pressure measurement and venous blood sampling. As a result, hydraulic effects of bathing caused an increase in the left ventricular end-diastolic volume probably based on augmented venous return. With respect to the thermal effects, high temperature (i.e., 40℃) bathing caused increased cardiac workload (i.e., increased heart rate and double product), vasodilatation (i.e., decreased total peripheral vascular resistance) and sympathetic acceleration evaluated by plasma catecholamine and spectral analysis of heat rate variability. Various temperature-dependent neurohumoral factors are considered to underlie the cardiovascular as well as autonomic responses. In conclusion, optimal bathing temperature has to be determined to prevent the sudden cardiac death in bathing.