Objective: Repetitive transcranial magnetic stimulation (rTMS) is a promising approach in improving swallowing function after stroke. However, comparative efficacy of different rTMS protocols for poststroke dysphagia (PSD) remains unclear.
Data Sources: PubMed, Embase, and Cochrane database were systematically searched for eligible random controlled trials (RCTs) from inception to August 30, 2024.
Study Selection: RCTs comparing rTMS with control or head-to-head comparisons of 2 rTMS protocols in patients with PSD.
Data Extraction: Data were extracted by 2 independent reviewers. A network meta-analysis combining direct and indirect evidence was conducted to assess the pooled findings of RCTs with standard mean difference (SMD) with 95% credible interval (CrI).
Data Synthesis: Eighteen RCTs involving 760 participants (mean age of 62.4 [range 49.7-74.7] years; 45.7% women) were included. Pooled data showed that high frequency (HF)/ipsilesional hemisphere (ipsi-hemi) (SMD, -0.94; 95% CrI, -1.51 to -0.44), HF/bilateral hemisphere (bi-hemi) (SMD, -2.59; 95% CrI, -3.50 to -1.72), HF/ipsilesional cerebellar (ipsi-CRB) (SMD, -0.79; 95% CrI, -1.55 to -0.10), HF/bilateral cerebellar (bi-CRB) (SMD, -1.02; 95% CrI, -1.83 to -0.29), and HF/ipsi-hemi + low frequency (LF)/contralesional hemisphere (contra-hemi) (SMD, -2.72; 95% CrI, -4.12 to -1.41) rTMS all significantly improved swallowing function compared with control. For patients with acute stroke, HF/ipsi-hemi rTMS had a positive effect (SMD, -1.36; 95% CrI, -2.86 to -0.02); in subacute stage, HF/ipsi-hemi + LF/contra-hemi rTMS showed the best efficacy (SMD, -2.68; 95% CrI, -4.26 to -1.26). However, rTMS failed to improve swallowing function in chronic stage.
Conclusions: This network meta-analysis showed that most of the rTMS protocols (HF/ipsi-hemi, HF/bi-hemi, HF/ipsi-CRB, HF/bi-CRB, and HF/ipsi-hemi + LF/contra-hemi) may improve swallowing function in patients with PSD. The HF/ipsi-hemi rTMS had a positive effect in acute stage and the HF/ipsi-hemi + LF/contra-hemi protocol seemed to have the best efficacy when applied in subacute stroke.
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