Clinical Question: What is the risk of ischemic stroke and recurrent intracranial hemorrhage (ICH) associated with anticoagulation (AC) resumption in patients with mechanical heart valves (MHVs) who had intracranial hemorrhage, and what is the optimal timing for resuming AC?
Background: Among patients with MHVs, AC interruption after ICH requires balancing thromboembolic risks such as acute ischemic stroke (AIS) or valve thrombosis against the risk of recurrent hemorrhage, yet the optimal timing for resumption of AC remains unclear.
Study Design: Systematic review and meta-analysis
Setting: Nine observational studies conducted across multiple international healthcare settings
Synopsis: 435 patients with MHVs and ICH who resumed AC were included from the late 1970s to 2022. After the ICH event, AC suspension occurred for a range of 1 to more than 19 days, while AC resumption was generally within two weeks. About 21 (6%) AIS and 9 (3%) valve thromboses occurred during AC suspension. There was no significant association between the number of days off AC and the risk of AIS (P=0.6123). Meanwhile, 45 (11.4%) recurrent ICH events were observed after AC resumption. There was a significant inverse association between the number of days off AC and the risk of recurrent ICH (P=0.0345), indicating that each day without AC was associated with a statistically significant reduction in the odds of recurrence.
Estimated risk of ICH recurrence at 3.4 days was 75%, followed by 50% at 7.9 days, then 25% at 14.9 days. Conversely, the estimated risk of AIS at day zero was 4%, with a 25% increase at six days, 50% at 11 days, and 75% at 15.2 days.
Bottom Line: A temporal window approximately 10 to 15 days before resuming AC may offer the optimal balance between hemorrhagic and thromboembolic risk in patients with MHVs after ICH.
Citation: D’Anna L, et al. Timing and safety of anticoagulation reinitiation after intracranial hemorrhage in patients with mechanical valves: a meta-analysis. Neurology. 2025;105(8):e214184. doi:10.1212/WNL.0000000000214184.
Dr. Guirguis
Dr. Guirguis is an assistant clinical professor of medicine at UC San Diego and a hospitalist at UC San Diego Health, both in San Diego.