2026. OBSTRUCTIVE SLEEP APNEA AND HEART FAILURE: ECHOCARDIOGRAPHIC PHENOTYPE, HFPEF BURDEN, AND CLINICAL IMPLICATIONS IN A HOSPITAL-BASED OBSERVATIONAL COHORT. Asian Journal of Medical Research and Health Sciences. 4, 01 (Mar. 2026), 517–525. DOI:https://doi.org/10.65605/a-jmrhs.2026.v04.i01.pp517-525.