Nitroxyl improves cellular heart function by directly enhancing cardiac sarcoplasmic reticulum Ca2+ cycling. by Tocchetti, C, Wang, W, Froehlich, J, Huke, S, Aon, M, Wilson, G, Di Benedetto, G, O'Rourke, B, Gao, W, Wink, D, Toscano, J, Zaccolo, M, Bers, D, Valdivia, H, Cheng, H, Kass, D, Paolocci, N