In a list of HF medications, the respondents were asked to mark the essential, frequently used, and less frequently used medications among ACE inhibitors (ACEi), beta-blockers, MRA, ivabradine, hydralazine/isosorbide dinitrate, SGLT2 inhibitors, ARNi, diuretics, and digoxin. The gene discussed is SLC5A2; the disease is hydrops fetalis.