Newly emerging clinical evidence showed glucocorticoids, when added to best conventional therapy, could produce potent diuretic effects, and improve renal functions in patients with decompensated congestive heart failure. It holds ture even in the patients who failed to respond to high dose of furosemide (>200mg/day). The present study is to confirm the clinical efficacy of glucocorticoids on cardiovascular mortality in patients with decompensated congestive heart failure who are on best conventional therapy.