REN and hydrops fetalis: The present work demonstrated that the addition of low-dose dopamine in acute HF patients treated with iv furosemide was not associated with beneficial renoprotective (i.e., urea, creatinine, worsening renal-function events) and neurohormonal (i.e., adrenaline, noradrenaline, renin, angiotensin, aldosterone, troponin, and natriuretic peptides) effects.