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Table 1 Comparison between heparin and low molecular weight heparin (LMWH) size and anticoagulant activity

From: Arterial indications for the low molecular weight heparins

  Heparin LMWH
Mean molecular weight 12,000–15,000 4000–6500
Saccharide units (mean) 40–50 13–22
Anti-Xa : anti-IIa activity 1:1 2:1–4:1
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