Comparative Effects of High and Low Frequency Deep Muscle Stimulation on Stroke Rehabilitation Outcomes

Abstract

A total of 126 patients were divided into three groups in this study: a high-frequency group (60 Hz), a low-frequency group (30 Hz), and a control group. Each group underwent routine rehabilitation, medications, and whole course nutrition nursing. The high-frequency group received deep muscle stimulation at 60 Hz for 10 min daily over 14 days. The low-frequency group was treated with deep muscle stimulation at 30 Hz. Compared to the control group, deep muscle stimulation, particularly at lower frequencies, resulted in improved outcomes as indicated by lower scores on the modified Ashworth scale and National Institutes of Health Stroke Scale and higher scores on the modified Tardieu scale, Fugl-Meyer motor assessment, and Brunnstrom index. Furthermore, the Barthel index and stroke-specific quality of life scores were higher in the deep muscle stimulation groups, especially the low-frequency group. No significant differences in nutritional status were observed among the groups post-intervention. In summary, varying frequencies of deep muscle stimulation, alongside whole-course nutrition management, showed potential in reducing lower limb muscle tone and enhancing the quality of life in stroke patients. The therapeutic outcomes in the low-frequency group were more favorable compared to those in the high-frequency group.