BACKGROUND: Right-to-left cardiac shunt (RLS) is considered a risk factor for stroke, especially in patients aged <55 years. We aimed to investigate the current management and prognosis in consecutive patients with RLS and otherwise cryptogenic cerebrovascular events. METHODS: In total, 1,126 patients with cryptogenic stroke or TIA were included from 17 German neurology departments. During a mean follow-up of 28.4 months, we assessed current antithrombotic medication, percutaneous device closure (PDC) and recurrent cerebrovascular events in 899 patients (79.8%). Stroke recurrence was compared between 548 patients without RLS and 351 patients with RLS under various prevention regimens. RESULTS: RLS was detected in 35.9% of cryptogenic cerebrovascular patients, but could not be evaluated as an independent predictor for recurrent stroke (adjusted HR 1.6, 95% CI: 0.9-2.7). In RLS-positive patients, the Kaplan-Meier estimate for stroke during the first year was 4.1% (95% CI: 1.9-6.3%) and 1.7% (95% CI: 0.9-2.4%) per year thereafter. At the last follow-up before recurrent stroke or end of study, 117 RLS-positive patients (33.3%) had received a PDC, 154 (43.9%) were receiving antiplatelets, 63 (17.9%) received anticoagulation, and 17 (4.8%) received none of the above. No association with recurrent stroke was found for the secondary preventive regime. CONCLUSION: Our multicenter hospital-based cohort study confirmed low recurrent event rates in RLS patients with otherwise cryptogenic stroke or TIA, as well as a great heterogeneity of current management. Despite the lack of scientific evidence, a substantial number of RLS-positive patients underwent PDC for secondary stroke prevention. Copyright 2009 S. Karger AG, Basel.
BACKGROUND: Right-to-left cardiac shunt (RLS) is considered a risk factor for stroke, especially in patients aged <55 years. We aimed to investigate the current management and prognosis in consecutive patients with RLS and otherwise cryptogenic cerebrovascular events. METHODS: In total, 1,126 patients with cryptogenic stroke or TIA were included from 17 German neurology departments. During a mean follow-up of 28.4 months, we assessed current antithrombotic medication, percutaneous device closure (PDC) and recurrent cerebrovascular events in 899 patients (79.8%). Stroke recurrence was compared between 548 patients without RLS and 351 patients with RLS under various prevention regimens. RESULTS: RLS was detected in 35.9% of cryptogenic cerebrovascular patients, but could not be evaluated as an independent predictor for recurrent stroke (adjusted HR 1.6, 95% CI: 0.9-2.7). In RLS-positive patients, the Kaplan-Meier estimate for stroke during the first year was 4.1% (95% CI: 1.9-6.3%) and 1.7% (95% CI: 0.9-2.4%) per year thereafter. At the last follow-up before recurrent stroke or end of study, 117 RLS-positive patients (33.3%) had received a PDC, 154 (43.9%) were receiving antiplatelets, 63 (17.9%) received anticoagulation, and 17 (4.8%) received none of the above. No association with recurrent stroke was found for the secondary preventive regime. CONCLUSION: Our multicenter hospital-based cohort study confirmed low recurrent event rates in RLS patients with otherwise cryptogenic stroke or TIA, as well as a great heterogeneity of current management. Despite the lack of scientific evidence, a substantial number of RLS-positive patients underwent PDC for secondary stroke prevention. Copyright 2009 S. Karger AG, Basel.
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