SLC5A2 and hydrops fetalis: Baseline characteristics were well balanced between groups except for numerically higher median monthly income and lower mineralocorticoid receptor antagonist/sodium-glucose cotransporter-2 inhibitor prescription in the financial support group.<h4>Conclusions</h4>The FUND-HF pilot trial successfully enrolled a deeply socioeconomically disadvantaged HF with reduced ejection fraction population using a multidomain social determinants of health eligibility framework with comprehensive socioeconomic phenotyping across multiple domains.