Saba Maryam A, Goharpey Shahin, Attarbashi Moghadam Behrouz, Salehi Reza, Nejatian Mostafa
Musculoskeletal Rehabilitation Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
Physical Therapy Department, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran.
Cardiol Ther. 2021 Jun;10(1):201-209. doi: 10.1007/s40119-021-00210-0. Epub 2021 Feb 13.
Exercise capacity and quality of life are the main outcomes in cardiac rehabilitation (CR). Exercise capacity is one of the important prognostic and diagnostic measures acquired by the exercise tolerance test (ETT). The 6-min walk test (6MWT), as a functional walking test, is another tool for assessing exercise capacity.
Eighty postoperative coronary artery bypass grafting (CABG) participants admitted to three CR units were recruited for this cross-sectional and multicenter study, based on convenient non-probability sampling. All participants performed an ETT and two repeated 6MWTs. Maximum heart rate (HR), maximum blood pressure (BP), maximal oxygen uptake (VO2), and peak metabolic equivalents of tasks (MET) during the tests and also the 6-min walk distance (6MWD) were the outcome measures.
The mean age of all participants was 62.13 (7.12) years and 80% were male. Pearson correlation showed that maximum HR (r(78) = 0.67, P < 0.001) and maximum systolic BP (r(78) = 0.57, P < 0.001) during the 6MWT correlated moderately with those achieved during ETT. Maximum HR in the 6MWT corresponded to 86% of that achieved during ETT. The 6MWD showed a strong positive correlation with peak MET estimated during ETT as a measure of exercise capacity (r = 0.77, P < 0.001).
The results from this study suggest that the 6MWT is a valid tool for assessing functional capacity for prescribing exercise in a group of postoperative CABG participants admitted to CR units. This finding is helpful for healthcare professionals and for patients, as the test is easy to administer and also well tolerated by patients.
PHT-9923.
运动能力和生活质量是心脏康复（CR）的主要成果。运动能力是通过运动耐力测试（ETT）获得的重要预后和诊断指标之一。6分钟步行试验（6MWT）作为一种功能性步行测试，是评估运动能力的另一种工具。
基于方便的非概率抽样，招募了80名入住三个心脏康复单元的冠状动脉旁路移植术（CABG）术后参与者进行这项横断面多中心研究。所有参与者均进行了一次ETT和两次重复的6MWT。测试期间的最大心率（HR）、最大血压（BP）、最大摄氧量（VO2）、任务峰值代谢当量（MET）以及6分钟步行距离（6MWD）为观察指标。
所有参与者的平均年龄为62.13（7.12）岁，80%为男性。Pearson相关性分析显示，6MWT期间的最大心率（r(78) = 0.67，P < 0.001）和最大收缩压（r(78) = 0.57，P < 0.001）与ETT期间达到的数值呈中度相关。6MWT中的最大心率相当于ETT期间达到数值的86%。6MWD与ETT期间估计的作为运动能力指标的峰值MET呈强正相关（r = 0.77，P < 0.001）。
本研究结果表明，6MWT是评估入住心脏康复单元的CABG术后参与者运动处方功能能力的有效工具。这一发现对医疗保健专业人员和患者都有帮助，因为该测试易于实施且患者耐受性良好。
PHT - 9923。
