Key result
Three-week cardiac rehab is linked to a ~67 meter increase in six-minute walk distance in IHD.
Why the study?
Although the six-minute walking test is widely available for evaluating functional capacity in cardiac patients, its interpretation presents difficulties and contradictions.
Does a 3-week outpatient cardiac rehabilitation program improve exercise tolerance measured by the six-minute walking test in patients with ischemic heart disease?
Observational (n=97)
Does a 3-week outpatient cardiac rehabilitation program improve exercise tolerance measured by the six-minute walking test in patients with ischemic heart disease?
Absolute Event Rate: 485% vs 418%
p-value: p=<0.001
A 3-week outpatient cardiac rehabilitation program significantly improves exercise tolerance in patients with ischemic heart disease, as evidenced by increased 6-minute walk test distances.
May support short-term exercise gains with outpatient cardiac rehab in ischemic heart disease; leaves open confirmation via randomized trials on durability and outcomes.
Background.Even though the six-minute walking test is a simple and widely available tool for the evaluation of the functional capacity of cardiac patients, its interpretation is associated with some difficulties and contradictions.Aims:To evaluate the dynamics of tolerance to physical activity during outpatient rehabilitation of patients with ischemic heart disease using predicted values of distance in the six-minute walking test.Materials and methods.97 patients (70 men and 27 women, average age 59.6 [50; 60] years) after acute coronary syndrome and after myocardial revascularization were included. The six-minute walking test was performed at the beginning of the 3-weeks stage of cardiac rehabilitation and before the patients discharge. The results of the test were reported as an absolute value, a change in absolute value, and the percentage of predicted values, estimated with the reference equation by Enright and colleagues.Results.The absolute value of distance in the six-minute walking test was increased significantly from 418 [385; 465] m to 485 [440; 525] m (p0.001). The number of patients with a distance less than 300 m was decreased significantly (12 patients, 12% vs 2 patients, 2%,p0.001). In most patients, the absolute increase in distance was 30 m and more (81 people, 84%). After comparing the perceived data with the calculated predicted values, it was revealed that the distance raised from 79 [71; 82]% to 92 [88; 96]% of the predicted values. And 56 patients (58%) had a distance equal to 90% or more from its predicted value.Conclusions.During the third stage of cardiac rehabilitation the significant increase of the absolute value of the six-minute walking test, the growth of the percentage of predicted values, and the decrease of patients with a distance less than 300 m were found. All these estimation methods may be used to demonstrate and prove favourable changes of tolerance to physical activity in patients with ischemic heart disease.
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Mikhailovskaya et al. (2021) conducted an observational in Ischemic heart disease (n=97). Outpatient cardiac rehabilitation vs. Baseline was evaluated on Absolute value of distance in the six-minute walking test (meters) (p=<0.001). A 3-week outpatient cardiac rehabilitation program significantly increased the absolute distance in the six-minute walking test from 418 m to 485 m (p<0.001) in patients with ischemic heart disease.
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