Spironolactone Versus Spironolactone Plus Furosemide (SVSSF)

Patients in arm A will receive potassium canrenoate at the initial dose of 200 mg/day, then increased up to 400 mg/day. Non responders will be treated with 400 mg/day of potassium canrenoate and furosemide at an initial dose of 50 mg/day, then increased up to 150 mg/day.

Patients in arm B will receive at first 200 mg/day of potassium canrenoate and 50 mg/day of furosemide, then increased up to 400 mg/day and 150 mg/day, respectively.