Calculate PESI score to risk-stratify confirmed PE. Base score = age in years. Add: male +10, cancer +30, heart failure +10, chronic lung disease +10, HR >= 110 +20, SBP < 100 +30, RR >= 30 +20, temp < 36 C +20, altered mentation +60, SpO2 < 90% +20. Class I <= 65 = very low 30-day mortality (1.6%).
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