Atrial fibrillation in patients with tandem occlusions undergoing mechanical thrombectomy was associated with lower rates of 90-day functional independence (aRR 0.49; 95% CI 0.31-0.76; p=0.001).
Cohort (n=635)
Yes
Does atrial fibrillation worsen functional outcomes and mortality in stroke patients with tandem occlusions treated with mechanical thrombectomy?
In patients with tandem occlusions undergoing mechanical thrombectomy, the presence of atrial fibrillation is associated with significantly worse 90-day functional outcomes and higher mortality despite similar procedural success.
Relative Risk: 0.49 (95% CI 0.31–0.76)
p-value: p=0.001
Background: Tandem occlusions, involving simultaneous extracranial and intracranial artery blockages, represent a complex subtype of acute ischemic stroke treated with mechanical thrombectomy (MT). However, to date, the impact of atrial fibrillation (AF) on outcomes in this population remains unclear. This study aimed to evaluate the safety and efficacy of MT in patients with tandem occlusions, comparing those with AF to their counterparts without AF. Methods: We performed a multicentre, retrospective study using inverse probability weighting (IPW) to evaluate the effect of AF on outcomes in tandem occlusion patients treated with MT across three comprehensive stroke centers. The primary outcome was functional independence at 90 days (modified Rankin Scale mRS 0–2). Secondary outcomes included recanalization success (Treatment in Cerebral Infarction (TICI) ⩾ 2b), intracranial hemorrhage (ICH), symptomatic ICH (sICH), and 90-day mortality. Subgroup analyses assessed the interaction between AF and clinical or procedural factors. Results: Among 635 patients, 164 (25.8%) had AF (Tandem AF ). Tandem AF patients had significantly lower rates of favorable 90-day functional outcomes (adjusted risk ratio aRR = 0.49; 95% confidence interval (CI): 0.31–0.76; p = 0.001) and higher 90-day mortality (aRR 2.29; 95% CI: 1.47–3.55; p < 0.001) compared to non-AF patients. Rates of successful recanalization, ICH, and sICH were similar between groups. Subgroup analysis revealed worse outcomes for Tandem AF patients aged ⩾65 years, with National Institute of Health Stroke Scale (NIHSS) 11–42, and those treated with general anesthesia or intravenous thrombolysis. Conclusions: Patients with tandem occlusion and AF undergoing MT showed significantly worse functional and survival outcomes relative to their non-AF counterparts, despite comparable procedural success rates. These findings highlight the critical need for tailored management strategies to mitigate the unique risks associated with AF in this population. Further research is essential to refine therapeutic approaches and improve outcomes for this high-risk group.
D’Anna et al. (2025) conducted a cohort in Acute ischemic stroke with tandem occlusions (n=635). Atrial fibrillation vs. No atrial fibrillation was evaluated on functional independence at 90 days (modified Rankin Scale [mRS] 0–2) (aRR 0.49, 95% CI 0.31-0.76, p=0.001). Atrial fibrillation in patients with tandem occlusions undergoing mechanical thrombectomy was associated with lower rates of 90-day functional independence (aRR 0.49; 95% CI 0.31-0.76; p=0.001).