Key result
Radiofrequency ablation lowers resting LVOT gradient by ~58 mmHg in hypertrophic obstructive cardiomyopathy.
Why the study?
Radiofrequency ablation is a minimally invasive alternative treatment for hypertrophic obstructive cardiomyopathy, but its efficacy and safety require systematic evaluation.
Does radiofrequency ablation reduce LVOT gradients and improve symptoms in patients with hypertrophic obstructive cardiomyopathy?
Meta-Analysis (n=727)
Yes
Does radiofrequency ablation reduce LVOT gradients and improve symptoms in patients with hypertrophic obstructive cardiomyopathy?
Radiofrequency ablation is an effective minimally invasive treatment that significantly reduces resting and provoked LVOT gradients and improves NYHA functional class in patients with hypertrophic obstructive cardiomyopathy.
Answers are grounded in this paper and cite their sources.
RFA was associated with LVOT gradient reduction and NYHA improvement in HOCM; leaves open direct comparison to myectomy or alcohol ablation.
Background Hypertrophic obstructive cardiomyopathy (HOCM) is a genetic heart disease leading to obstructive hypertrophy. Radiofrequency ablation (RFA) is a minimally invasive alternative to traditional treatments. This review evaluates RFA’s effectiveness and safety for HOCM.Methods A systematic review and meta-analysis were performed on studies from PubMed, Cochrane, and clinicaltrials.gov up to August 2024. Studies comparing RFA outcomes before and after the procedure were included. Data were analyzed through Revman software, using random-effects models. The funnel plots and Egger test were used for publication bias. Subgroup analysis and sensitivity analysis were also performed.Results This meta-analysis included 16 cohort studies and 2 case series, encompassing 727 patients with ages ranging from 10.4 to 62 years. The studies were conducted in various countries, including China, the USA, Germany, the UK, India, and Brazil. The analysis revealed significant improvements following radiofrequency ablation (RFA): the LVOT gradient at rest was reduced by MD −58.2 (CI: −71.2 to −56.93, p < 0.00001), and the provoked gradient decreased by MD −81.05 (CI: −97.67 to −64.42, p < 0.00001).Conclusion RFA effectively reduces both LVOT gradients at rest and provoked, improves NYHA functional class, and decreases septal size in HOCM patients.
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Hashim et al. (2025) conducted a meta-analysis in Hypertrophic obstructive cardiomyopathy (n=727). Radiofrequency ablation vs. Before procedure was evaluated on LVOT gradient at rest (MD -58.2, 95% CI -71.2 to -56.93, p=<0.00001). Radiofrequency ablation significantly reduced the resting LVOT gradient (MD -58.2; 95% CI -71.2 to -56.93; p<0.00001) and provoked gradient in patients with hypertrophic obstructive cardiomyopathy.
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