Chronic H.F : Rule-out  <125
Acute H.F    : Rule-Out <300
                    Gray Zone 300-450
                    Rule-in     >450
Note : mild increased in : 
         - Female
         - Renal hypofunction

Refrence : <300
Gray Zone : 300-700
probable H.F : >700
Note : mild increased of NT-Pro-BNP in renal hypofunction

Refrence : <300
Gray Zone : 300-900
probable H.F : >900
Note : mild increased of NT-Pro-BNP in renal hypofunction

Refrence : <300
Gray Zone : 300-1200
probable H.F : >1200
Note : mild increased of NT-Pro-BNP in renal hypofunction

Refrence : <300
Gray Zone : 300-1800
probable H.F : >1800
Note : mild increased of NT-Pro-BNP in renal hypofunction