Abstract 4137870: Nasal Etripamil Spray efficacy for Acute Paroxysmal Supraventricular Tachycardia: A Systematic Review, Meta-Analysis and Trial Sequential Analysis.

Background: Acute paroxysmal supraventricular tachycardia (PSVT) is a common arrhythmia. Etripamil, a novel calcium channel blocker via nasal spray, has shown promise for PSVT management. This meta-analysis and trial sequential analysis (TSA) evaluates the efficacy and safety of nasal Etripamil for treating PSVT. Methods: We systematically searched Pubmed, Embase, and Cochrane databases for studies assessing the efficacy and safety of Etripamil for PSVT. The main outcome was conversion to sinus rhythm(CSR) within 15 minutes. Secondary outcomes included adverse events(AE). Meta-analysis was performed using random-effects models, and TSA was employed to assess the robustness of the evidence and required information size. Results: Three randomized controlled trials (RCTs) and two extensive trials involving 1,652 participants were analyzed. Nasal Etripamil significantly increased the CSR within 15 minutes compared to placebo (RR 1.87 95% CI; 1.39-2.52, p <0.001; Figure A). Outcome TSA suggested a low risk of type 1 error; therefore, this result may be conclusive (Figure B). For the AEs both a pairwise and single-arm meta-analysis of studies was performed with 1 AEs being statistically significant in the single-arm plot, Nasal Discomfort (22.11 95% CI; 16.02-29.70 events per 100 observations, p <0.01 Figure C). In the pairwise, the overall was statistically significant and it favored placebo (RR 3.93, 95% CI; 2.46-6.27, p <0.001 Figure D). Conclusion: Nasal Etripamil is effective and safe for the treatment of acute PSVT, offering a non-invasive alternative to traditional therapies. Larger-scale RCTs are warranted to confirm these findings and explore long-term outcomes.