7Cheorghiade M, Abraham WT, Albert NM, et al. Relationshipbetween admission serum sodium concentration and clinical outomes in Patients hospitalized for heart failure: an analysis from the OPTIMIZE-HF registry. Eur Heart J,2007,28 (8) :980-988.
8van denBroek SA,van Veldhuisen DJ,de Graeff PA,et al.Comparison between New York Heart Association classification andpeak oxygen consumption in the assessment of functional status andprognosis in patients with mild to moderate chronic congestive heartfailure secondary to either ischemic or idiopathic dilatedcardiomyopathy[J].Am J Cardiol,1992,70(3):359-363.