Table 3

Pulmonary Embolism Severity Index

ParameterScoreRisk classTotal points
Demographic features I: very low

II: low

III: intermediate

IV: high

V: very high




 AgeAge in years
 Male sex+10
Comorbid conditions
 Heart failure+10
 Chronic lung disease+10
Clinical findings
 Pulse≥110 bpm+20
 SBP<100 mm Hg+30
 Altered mental status*+60
 Arterial blood oxygen saturation<90%†+20
  • *Defined as disorientation, lethargy, stupor or coma.

  • †With or without the administration of supplemental oxygen.

  • RR, respiratory rate; SBP, systolic blood pressure.