12213 Is Atrial Fibrillation An Adverse Cardiovascular Effect Of Romosozumab

Abstract Disclosure: S. Martinez: None. D. Anez: None. M. Shahid: None. Osteoporosis and cardiovascular disease are both common in older populations. Therefore, it is not uncommon to find the two disorders in a single individual and yet it may be difficult to establish whether the diseases are coincident or the result of complex hormonal processes interacting with multiple systems, including possibly sclerostin. Indeed, pre-existent cardiovascular disease predisposes to osteoporotic bone loss and increased fracture risk. To date, a number of studies have linked the incidence of major adverse cardiovascular events (MACE) with various osteoporosis treatments while other treatments have demonstrated no associated or a reduced cardiovascular risk. Here we discuss the possibility of romosozumab-induced sudden, new onset atrial fibrillation (a fib) in a 70-year-old female with no known risk factors other than age. A 70-year-old female with a 20-year history of osteoporosis presented to establish care. After 5 years of alendronate therapy, she was switched to denosumab injections, 60 mg every 6 months. During Covid the patient’s physicians closed their office and denosumab therapy was interrupted for approximately 18 months. Therefore, when the patient established care with a new rheumatologist she was started on romosozumab. After 6 months of romosozumab the patient developed new onset atrial fibrillation. The cardiovascular safety of romosozumab, in particular, has been adjudicated in two large trials describing predominantly major cardiovascular events such as myocardial infarction, stroke, heart failure and cardiovascular death. In one of those trials, two reports of atrial fibrillation were also included in the adverse events but further details were not available. These increased MACEs prompted a safety warning from the FDA such that use of romosozumab in patients who have experienced a myocardial infarction or stroke within the year prior to its use is contraindicated. Recently atrial fibrillation and congestive heart failure were documented in 78-year-old woman who had been receiving romosozumab for three months for the treatment of osteoporosis. Our case represents a second report of a temporal relationship between the initiation of romosozumab and the onset of atrial fibrillation raising the question of a possible cause and effect. Disclaimer: This research was supported (in whole or in part) by HCA Healthcare and/or an HCA Healthcare affiliated entity. The views expressed in this publication represent those of the author(s) and do not necessarily represent the official views of HCA Healthcare or any of its affiliated entities. Presentation: 6/3/2024