Combined oral positive inotropic and beta-blocker therapy for treatment of refractory class IV heart failure.
Shakar SF, Abraham WT, Gilbert EM, Robertson AD, Lowes BD, Zisman LS, Ferguson DA, Bristow MR. Combined oral positive inotropic and beta-blocker therapy for treatment of refractory class IV heart failure. J Am Coll Cardiol. 1998 May; 31(6):1336-40.