1Packer M. Beta -adrenergic blockade in chronic heart failure: principles,progress,and practice[J]. Prog Cardiovasc Dis, 1998,48( 1 ) :39
2Cohn JN, Levine B, Olivari MT, et al. Plasma norepinephrine as a guide to prognosis in patients with chronic congestive heart failure[ J]. N Engl J Med.1984.311(4) : 819
3Packer M, Cohn JN. Consensus recommendations for the management of chronic heart failure[ J]. Am J Cardiol, 1999,83 (Suppl 2A) : 1