Abstract A041: Recurrent Symptomatic Hemorrhage after Discontinuation of Atorvastatin versus Placebo in Randomized Trial of Hemorrhagic Cerebral Cavernous Malformations

Background: There is much interest in drug development to prevent rebleeding after symptomatic hemorrhage (SH) in cerebral cavernous malformations (CCM) and its neurologic sequelae. A recent randomized prospective controlled trial (AT CASH EPOC clinicaltrials.gov NCT02603328) demonstrated that atorvastatin for up to 2 years was safe but did not significantly alter CCM iron deposition or SH rates. However, the consequences of discontinuing atorvastatin in CCM patients remain unknown. Given reports of rebound effects with discontinuation of statins, we here hypothesize that SH recurs more frequently in hemorrhagic CCMs after discontinuation of atorvastatin than placebo. Methods: We conducted 12-month (±1 month) post-treatment follow-up of all 80 patients randomized in the AT CASH EPOC trial (41 atorvastatin, 39 placebo) to identify potential recurrent SH from the date of trial drug discontinuation. Every SH was adjudicated by review of imaging and corresponding symptoms. Patients were excluded for < 90% compliance with study drug or its discontinuation