Objectives: • Explain the experience and tasks undertaken by family caregivers of patients with advanced heart failure. • Summarize results and implications of the ENABLE CHF-PC trial for family caregivers. Importance: Family caregivers (CGs) provide high levels of care to persons with advanced heart failure and are at high risk for distress and poor quality of life (QoL). Objective(s): Determine the effect of a nurse-led palliative care telehealth intervention (ENABLE CHF-PC) on advanced heart failure CGs QoL and mood over 16 weeks. Method(s): Intervention versus usual care single-blind randomized controlled trial (August 2016-October 2018; ClinicalTrials.gov: NCT02505425). Family caregivers of patients with NYHA Class III/IV heart failure were recruited from outpatient heart failure clinics at a large academic tertiary care medical center and a Veterans Affairs Medical Center. Intervention-group caregivers received four weekly psychosocial and problem-solving support telephonic sessions facilitated by a trained nurse coach plus monthly follow-up for 48 weeks. The primary outcomes were QoL (Bakas Caregiving Outcomes Scale [BCOS]), mood (Hospital Anxiety and Depression Scale [HADS]), and burden (Montgomery-Borgatta Caregiver Burden scale [MBCB]) over 16 weeks. Results: Of 159 CGs randomized to ENABLE CHF-PC (n=83) or usual care (n=76), mean age was 57.9, 85.4% were female, 51.9% were African American, and 65.2% were the patient's spouse/partner. Over 16 weeks, the mean BCOS score improved 0.7 points (SE=1.7) in the intervention arm and 1.1 points (SE=1.6) in the usual care arm (difference, -0.4; 95% CI, -5.1-4.3; d=-0.03). No relevant between-group differences were observed for HADS-anxiety (d=-0.02), HADS-depression (d=0.03), and the MBCB scale (d range: -0.18-0.0). P-values for all outcomes were >.05. Conclusion(s): This 2-site randomized controlled trial of the ENABLE CHF-PC intervention for family caregivers of advanced heart failure patients, over half of whom were African-Americans and most of whom were not distressed at baseline, did not demonstrate clinically improved QoL, mood, or burden compared to usual care over 16 weeks. Impact: Future interventions should target distressed family caregivers and assess effects on patient outcomes.