心肌梗死患者不同康复时期代谢当量的预测

关键词：心肌梗死  康复程序  代谢当量

Keywords:myocardial infarction  rehabilitation programme  metabolic equivalent

摘要：

      目的：对递增负荷的Bruce跑台测试方案给出的代谢当量（METs）与运动中根据摄氧量（VO2）计算的METs进行比较，旨在为心肌梗死后（PMI）患者提供不同康复时期METs的预测。方法：101名男性PMI患者参加了12周有氧多样化运动康复程序，程序前、后对其气体代谢、心肺机能、运动能力等指标进行测试。结果：康复程序前后受试者安静时的VO2分别为3.9ml/kg·min和3.8ml/kg·min。运动中的METs与跑台测试方案给出的METs及以安静状态VO2为3.5ml/kg·min（正常成人）时计算得出的METs均有差异。本研究为PMI患者提供的预测METs方法分别为：康复程序前，METs=3.2+1.07跑台等级，或METs=-7.4+0.12HR（心搏次数/min）；康复程序后，METs=1.9+1.04跑台等级，或METs=-6.4+0.11HR(心搏次数/min）。结论：本研究建立的HR与METs的相关关系，有助于指导患者确定运动的适宜强度。

Abstract:

      Objective: To compare the metabolic equivalent(METs) derived from Bruce treadmill protocol with those calculated from measured VO2， and recommend a predictive procedure to establish individual METs for post myocardial infarction (PMI) patients at different stages of rehabilitation. Method: One hundred and one male recent PMI patients undertook a 12-week exercises-based cardiac rehabilitation program. Physiological and functional variables of the PMI patients were measured and analyzed both pre and post the program through a graded exercises test. Result: The VO2 at rest were 3.9ml/kg·min and 3.8ml/kg·min for the patients pre and post the program respectively. The METs obtained during exercises for the patients differed from that either provided by treadmill protocol or calculated based on 3.5ml/kg·min VO2 at rest. A prediction method for PMI patients to establish their METs values was provided in this study, i.e. METs=3.2+1.07 treadmill grade, or METs=-7.4+0.12HR（beats/min） for pre-program； and METs = 1.9+1.04 treadmill grade or METs=-6.4+0.11 HR（beats/min）for post-program. Conclusion: The correlated relationship established in the study between HR and METs will be helpful for instructing the patients to take exercises with appropriate intensity.