Optimal Diuretic Therapies for Acute Heart Failure With Volume Overload

1\. 500 mg IV bolus of acetazolamide at randomization (day 0) and repeated the next 3 mornings (day 1, day 2 and day 3). This arm will also receive a placebo- Metolazone tablet together with each acetazolamide-injection.

2\. 2.5 mg oral Metolazone at randomization (day 0) and repeated the next 3 mornings (day 1, day 2 and day 3). This arm will also receive a placebo- acetazolamide injection together with each metolazone-tablet.

This arm will also receive both a placebo-acetazolamide injection together with a placebo-metolazone-tablet at randomization and repeated the next 3 mornings (day 1, day 2 and day 3).