Abstract
PURPOSE: Minimally invasive techniques for treatment-resistant migraine have been developed upon recent insights into the peripheral pathogenesis of migraines. Although there is a growing body of evidence supporting these techniques, no study has yet compared the effects of these treatments on headache frequency, severity, duration, and cost. METHODS: PubMed, Embase, and Cochrane Library databases were searched to identify randomized placebo-controlled trials that compared radiofrequency ablation, botulinum toxin-A (BT-A), nerve block, neurostimulation, or migraine surgery to placebo for preventive treatment. Data on changes from baseline to follow-up in headache frequency, severity, duration, and quality of life were analyzed. RESULTS: A total of 30 randomized controlled trials and 2680 patients were included. Compared to placebo, there was a significant decrease in headache frequency in patients with nerve block (p=0.04) and surgery (p<0.001). Headache severity decreased in all treatments. Duration of headaches was significantly reduced in the BT-A (p<0.001) and surgery cohorts (p=0.01). Quality of life improved significantly in patients with BT-A, nerve stimulator, and migraine surgery. Migraine surgery had the longest lasting effects (11.5 months) compared with nerve ablation (6 months), BT-A (3.2 months), and nerve block (11.9 days). CONCLUSION: Migraine surgery is a cost-effective, long-term treatment to reduce headache frequency, severity, and duration without significant risk of complication. BT-A reduces headache severity and duration, but is short lasting and associated with greater adverse events and lifetime cost. Although efficacious, radiofrequency ablation and implanted nerve stimulators have high risks of adverse events and explanation, while benefits of nerve blocks are short in duration.
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