Cardiorespiratory Responses during Cycle Ergometer Exercise with Different Ramp Slope Increments in Patients with Chronic Obstructive Pulmonary Disease.

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  • MIYAHARA Nobuaki
    the Department of Internal Medicine, Respiratory Disease Center, National Sanyo Hospital
  • EDA Ryosuke
    the Department of Internal Medicine, Respiratory Disease Center, National Sanyo Hospital
  • TAKEYAMA Hiroyasu
    the Department of Internal Medicine, Respiratory Disease Center, National Sanyo Hospital
  • MAEDA Tadashi
    the Department of Internal Medicine, Respiratory Disease Center, National Sanyo Hospital
  • AOE Keisuke
    the Department of Internal Medicine, Respiratory Disease Center, National Sanyo Hospital
  • KUNICHIKA Naomi
    the Department of Internal Medicine, Respiratory Disease Center, National Sanyo Hospital
  • KOHARA Hiroyuki
    the Department of Internal Medicine, Respiratory Disease Center, National Sanyo Hospital
  • HARADA Mine
    the Department of Internal Medicine II, Okayama University Medical School

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Objective The ramp exercise test has been widely used to evaluate cardiopulmonary responses to an incremental exercise load. This study was performed to clarify whether different slopes of the ramp exercise test influence exercise tolerance, exercise limiting factors, and respiratory pattern in patients with chronic obstructive pulmonary disease (COPD).<br> Subjects and Methods We applied three different slopes (5 W/min, 10 W/min and 20 W/min) of the ramp exercise test in 9 patients with COPD and evaluated cardiopulmonary responses.<br> Results There were no significant differences in peak oxygen uptake, anaerobic threshold (AT), minute ventilation, heart rate, arterial oxygen saturation, expired tidal volume, or respiratory rate at the maximal load among the three different ramp exercises tested. AT could be determined in six of nine patients (67%) at the slope of 5 W/min, in 8/9 (89%) at the slope of 10 W/min, and in 9/9 (100%) at the slope of 20 W/min.<br> Conclusion The findings suggest that the ramp slope does not affect exercise tolerance, exercise limiting factors, or respiratory patterns and each of these ramp slopes is useful for the evaluation of COPD. Ramp slopes of 10 W/min or 20 W/min should be appropriate for the determination of AT.<br>(Internal Medicine 39:15-19, 2000)

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  • Internal Medicine

    Internal Medicine 39 (1), 15-19, 2000

    一般社団法人 日本内科学会

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