"Low-Dose Dopamine or Low-Dose Nesiritide in Acute Heart Failure With Renal Dysfunction"  
JAMA
http://jama.jamanetwork.com/article.aspx?articleid=1779722
"Conclusion and Relevance  In participants with acute heart failure and renal dysfunction, neither low-dose dopamine nor low-dose nesiritide enhanced decongestion or improved renal function when added to diuretic therapy."