Mili Jimenez GallardoAndrea Castillo SuárezPeng LiRamon C HermidaMichael SmolenskyClaudia Duran-AniotzAndrea SlachevskyDavid AguillonBEHRENS PELLEGRINO, MARIA ISABELMARIA ISABELBEHRENS PELLEGRINOHernando Santamaria-GarciaAdolfo M GarcíaDiana MatallanaAgustín IbáñezKun HuShahab Haghayegh2025-09-022025-09-022025-05Gallardo, M. J., Suárez, A. C., Li, P., Hermida, R. C., Smolensky, M., Duran-Aniotz, C., Slachevsky, A., Behrens, M., Aguillon, D., Santamaria-Garcia, H., García, A. M., Matallana, D., Ibáñez, A., Hu, K., & Haghayegh, S. (2025). 1278 feasibility of 48-h ambulatory bp assessment in latinos with dementia. SLEEP, 48(Supplement_1), A550-A551. https://doi.org/10.1093/sleep/zsaf090.1278https://hdl.handle.net/123456789/1133710.1093/sleep/zsaf090.1278Abstract Introduction Ambulatory blood pressure (BP) monitoring encapsulates 24-h BP patterns across the sleep-wake cycle and provides a comprehensive assessment of BP regulation with certain features, such as sleep-time dipping, that can better predict health outcomes than traditional office BP measurements. However, 24-h BP patterns remain understudied in Latino populations, especially older adults. This pilot study investigated the feasibility of continuously ambulatory BP monitoring blood pressure with portable devices in Latinos with dementia. Methods Eight participants (4 with Alzheimer’s disease, 1 with Frontotemporal dementia, 3 controls; age range 45.8-80.3 years) from the ReDLat cohort (Multi-Partner Consortium to Expand Dementia Research in Latin America) were enrolled for a 48-h ambulatory BP assessment with hourly measurements using a portable arm-cuff device. Participants also answered six questions to evaluate: (1) device adaption, (2) measurement frequency tolerability, (3) study duration acceptability, (4) perceived value of the assessment, (5) willingness to perform the assessment again, and (6) likelihood of recommending the assessment to others. Results The study yielded high-quality recordings with minimal missing BP measurements (range: 0%-14.1%; mean: 8.9%). Device adaptation improved over time, with 75% (6/8) reporting better tolerance on the second day and 25% (2/8) reporting consistently good tolerance across both days. All participants reported that hourly BP measurement was tolerable, and majority (7/8, 87.5%) found 48-h monitoring acceptable. Seven participants (87.5%) believed that the assessment was valuable, were willing to participate again, and likely recommend to others the assessment. Conclusion Our findings demonstrate that 48-hour ambulatory BP monitoring is feasible and well-tolerated among older Latino adults with mild to moderate dementia in Latin American settings. Further feasibility testing should be performed in large samples and other populations, including individuals at later stages of dementia and in different countries.journal-article