To explore the multidimensional fatigue and motor perception of patients with acute myocardial infarction at different time points,and to construct a cross-lag model to analyze the dynamic correlation between multi-dimensional fatigue and motor perception.

A total of 308 patients with acute myocardial infarction admitted to our hospital from May 2023 to January 2025 were selected.The general information questionnaire,the Chinese version of the Exercise Sensitivity Qustionnaire(ESQ),and the Chinese version of the Multidimensional Fatigue Inventory(MFI-20) were used to investigate the levels of multidimensional fatigue and motor perception of the patients 1 day before discharge,1 month after discharge,and 3 months after discharge.

One day before discharge,1 month after discharge,and 3 months after discharge,the MFI-20 scores of patients with acute myocardial infarction were 57.12±6.42,51.69±4.93,and 42.39±5.07 respectively.The ESQ scores were 40.24±5.68,36.57±4.74,and 29.13±4.16 respectively.There were statistically significant differences in terms of MFI-20 and ESQ scores among patients with different NYHA classifications and comorbidities at the three time points(all P<0.05).Pearson correlation analysis showed that there was a positive correlation between MFI-20 and ESQ scores at the three time points(all P<0.01).The results of the cross-lag model showed that the model had a good fitting effect.The multidimensional fatigue of patients 1 day before discharge could positively predict their movement perception 1 month after discharge(P<0.01).The multi-dimensional fatigue of patients 1 month after discharge could positively predict their movement perception 3 months after discharge(P<0.01).The movement perception of patients 1 day before discharge could also positively predict the multi-dimensional fatigue 1 month after discharge(P<0.05).The movement perception of patients 1 month after discharge could also positively predict the multi-dimensional fatigue of them 3 months after discharge(P<0.01).

Within 3 months after discharge,multidimensional fatigue and the level of movement perception in patients with acute myocardial infarction showed a downward trend.However,multidimensional fatigue and movement perception were mutually causal.There was a dynamic interactive influence relationship between them.Clinical nurses should pay attention to the collaborative intervention of fatigue relief and improvement of movement perception,so as to promote the recovery of patients.