ObjectiveTo investigate the effects of intermittent high-intensity cardiac rehabilitation training on myocardial strain parameters, cardiac function and exercise tolerance in patients with heart failure. MethodsA total of 101 patients with heart failure were randomly divided into a control group (n=50) or an observation group (n=51). The control group patients performed routine rehabilitation exercises, while the observation group patients performed intermittent high-intensity cardiac rehabilitation training. Both groups were intervened for 6 months. The myocardial strain parameters, cardiac function and exercise tolerance were compared between the two groups before and after the intervention. ResultsAfter the 6-month intervention, the left and right ventricular maximal systolic longitudinal strain levels of the observation group were higher than those of the control group (all P＜0.05), and there was no significant difference in the left or right ventricular maximal systolic longitudinal strain rate between the two groups (all P＞0.05). The left ventricular ejection fraction of the observation group was higher than that of the control group (P＜0.05), and there was no significant difference in the left ventricular end-diastolic diameter between the two groups (P＞0.05). The peak oxygen uptake, peak power, exercise duration and anaerobic threshold levels of the observation group were higher/longer than those of the control group (all P＜0.05). ConclusionThe intermittent high-intensity cardiac rehabilitation training can improve myocardial strain parameters, cardiac function and exercise tolerance in patients with heart failure, which is worthy of clinical promotion and application.

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