Thrombosis: Obesity and Excess Weight as Modulators of Risk

Ventilation / Perfusion: ~98% sensitive, ~10% specific; high pretest + high probability scan = 96% PPV; low pretest + low probability scan = 96% NPV; all others: need more studies. Electrocardiogram: classic S1 – Q3 – T3 only present in 10-15%; only 30-50% have tachycardia. Tx heparin ................
................