Evaluation of novel indices of walking performance taking oxygen desaturation into account during six-minute walk test in cardiovascular disease patients

Yujiro Matsuoka,Takeshi Horio, Megumi Ono,Ryutaro Yoshimura, Kohei Fukuda, Masahiro Shimizu, Kazuhiro Nakao, Shogo Ito, Yoshiki Asakura,Yasuhiro Izumiya,Daiju Fukuda,Noriaki Kasayuki,Kohei Fujimoto

Heart and Vessels(2024)

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摘要
In pulmonary disease patients since oxygen desaturation during 6-min walk test (6MWT) affects walk distance (6MWD), some novel indices such as desaturation/distance ratio [DDR, oxygen desaturation area (DAO2)/6MWD] and distance-saturation product [DSP, 6MWD × minimum peripheral oxygen saturation (SpO2)] are evaluated. However, there has been no study examining these indices that consider exercise-induced desaturation (EID) in patients with cardiovascular disease. In 94 cardiovascular disease patients without pulmonary complications, 6MWT and echocardiography were performed at the entry of cardiac rehabilitation. SpO2 was measured during 6MWT using a continuously monitorable pulse oximeter, and DSP and DDR were calculated using minimum SpO2 and DAO2 [sum of (100-SpO2) per second during 6MWT], respectively. EID was defined as SpO2 decrease of ≥ 4
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关键词
Exercise test,Oxygen desaturation,Six-minute walk distance,Cardiovascular disease
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