Key result
LAAO after ICH yields a net clinical benefit of ~12 events per 100 patient-years.
Why the study?
AF after intracerebral hemorrhage creates a conflict between ischemic stroke and recurrent bleeding risks when considering oral anticoagulation. Although left atrial appendage occlusion offers a nonpharmacologic alternative, isolated stroke or bleeding rates do not capture its overall benefit-harm balance.
Does endocardial left atrial appendage occlusion improve net clinical benefit compared to external benchmark rates in patients with atrial fibrillation after intracerebral hemorrhage?
Meta-Analysis
Does endocardial left atrial appendage occlusion improve net clinical benefit compared to external benchmark rates in patients with atrial fibrillation after intracerebral hemorrhage?
Answers are grounded in this paper and cite their sources.
In patients with atrial fibrillation and prior intracerebral hemorrhage, endocardial left atrial appendage occlusion demonstrates a positive net clinical benefit against external benchmarks, though estimates are highly sensitive to comparator selection and endpoint composition.
Background/Objectives: Atrial fibrillation (AF) after intracerebral hemorrhage (ICH) creates a therapeutic conflict: withholding oral anticoagulation may increase ischemic stroke risk, whereas resumption of anticoagulation may increase recurrent ICH. Left atrial appendage occlusion (LAAO) offers a nonpharmacologic alternative, but isolated stroke or bleeding rates do not describe the overall benefit–harm balance. This focused review examines net clinical benefit (NCB) as a decision framework for LAAO after ICH and presents a secondary benchmark-adjusted analysis derived from our prior systemaatic review and meta-analysis. Methods: Thirteen endocardial LAAO cohorts with complete data for ischemic stroke, recurrent ICH, major bleeding, and all-cause death contributed to the analysis. The component event data and prespecified severity weights were carried forward from the prior meta-analysis; the external benchmark comparison, study-level benchmark-adjusted NCB synthesis, and benchmark-sensitivity analyses were not part of that report and constitute the distinct secondary analysis presented here. Results: Prespecified external benchmark rates were 8.0, 2.0, 3.0, and 6.0 events per 100 patient-years, respectively. Unweighted and severity-weighted NCB were evaluated using both pooled-rate and study-level Hartung–Knapp random-effects approaches. Study-level pooled NCB was 12.20 events per 100 patient-years (95% CI, 8.61–15.79; I2 = 96%), and weighted NCB was 14.39 (95% CI, 8.84–19.94; I2 = 94%). Additional two-component analyses using PRESTIGE-AF reference rates yielded unweighted NCB estimates of 5.65 and 2.06 events per 100 patient-years for no-OAC and DOAC comparator scenarios, respectively. Excluding all-cause mortality from the original model yielded an unweighted NCB of 8.41. These exploratory results highlight the sensitivity of NCB estimates to comparator selection and endpoint composition. Conclusions: Contemporary randomized evidence, including PRESTIGE-AF, CLOSURE-AF, and CHAMPION-AF, reinforces that benefit–harm balance is population-, comparator-, endpoint-, and time-horizon-dependent. Accordingly, these NCB estimates should be interpreted as decision-analytic and hypothesis-generating rather than causal treatment effects. ICH-specific randomized comparisons remain essential.
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Kourek et al. (2026) conducted a meta-analysis in Atrial fibrillation after intracerebral hemorrhage. Left atrial appendage occlusion (LAAO) vs. Prespecified external benchmark rates and PRESTIGE-AF reference rates (no-OAC and DOAC scenarios) was evaluated on Net clinical benefit (NCB) integrating ischemic stroke, recurrent intracerebral hemorrhage, major bleeding, and all-cause death (NCB 12.20 events per 100 patient-years, 95% CI 8.61-15.79). Left atrial appendage occlusion after ICH yielded a pooled net clinical benefit of 12.20 events per 100 patient-years (95% CI, 8.61–15.79) against external benchmarks.
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