Heparin therapy should be monitored with intermittent estimation of:
aPTT is maintained 1.5 - 2 times the normal mean aPTT value. Clotting time is maintained at 1.8 - 2.5 times the normal mean aPTT value. From medical pharmacology padmaja 4th edition Page no 335
Bleeding time
aPTT
Prothrombin time
All of the above
Hematology