Rehabilitation Science Graduate Program, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil (Ms D'arc Lelis and Drs Chaves and Britto); Cardiovascular Prevention and Rehabilitation Program, University Health Network, University of Toronto, Toronto, Ontario, Canada (Drs Ghisi and Grace); and School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada (Drs Ghisi and Grace).
J Cardiopulm Rehabil Prev. 2019 May;39(3):E1-E7. doi: 10.1097/HCR.0000000000000412.
To evaluate the validity of the Incremental Shuttle Walk Test (ISWT) for determining risk stratification in cardiac rehabilitation (CR).
This is a cross-sectional study at a major CR center in a middle-income country. Clinically stable adult cardiac patients underwent an ISWT and an exercise test (ET), wore a pedometer for 7 d, and completed the Godin-Shepherd Leisure-Time Physical Activity Questionnaire. Metabolic equivalents of task (METs) achieved on the ISWT were calculated.
One hundred fifteen patients were evaluated. The mean ± standard deviation distance on the ISWT was 372.70 ± 128.52 m and METs were 5.03 ± 0.62. The correlation of ISWT distance with ET METs (7.57 ± 2.57), steps/d (4556.71 ± 3280.88), and self-reported exercise (13.08 ± 15.19) was rs = 0.61 (P < .001), rs = 0.37 (P < .001), and rs = 0.20 (P = .031), respectively. Distance on the ISWT accurately predicted METs from the ET (area under the receiver operating characteristic curve = 0.774). The ability to walk ≥410 m on the ISWT predicted, with a specificity of 81.5% and a sensitivity of 65.6%, a functional capacity of ≥7 METs on ET.
The ISWT is an alternative way to evaluate functional capacity in CR and can contribute to the process of identifying patients at low risk for a cardiac event during exercise at moderate intensity.
评估递增 shuttle 步行测试（ISWT）在心脏康复（CR）中确定风险分层的有效性。
这是一项在中等收入国家的主要 CR 中心进行的横断面研究。临床稳定的成年心脏患者进行 ISWT 和运动试验（ET），佩戴计步器 7 天，并完成 Godin-Shepherd 休闲时间体育活动问卷。计算 ISWT 上的代谢当量（METs）。
共评估了 115 例患者。ISWT 的平均±标准偏差距离为 372.70±128.52m，METs 为 5.03±0.62。ISWT 距离与 ET METs（7.57±2.57）、步数/d（4556.71±3280.88）和自我报告的运动（13.08±15.19）的相关性 rs 为 0.61（P<.001）、rs 为 0.37（P<.001）和 rs 为 0.20（P=.031）。ISWT 上的距离可以准确预测 ET 中的 METs（受试者工作特征曲线下面积=0.774）。ISWT 上能行走≥410m 能以 81.5%的特异性和 65.6%的敏感性预测 ET 上的功能能力≥7METs。
ISWT 是 CR 中评估功能能力的替代方法，可以有助于识别在中等强度运动时心脏事件风险较低的患者。
