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Cardiology Emergency Medicine

Boston Syncope Criteria

Identifies high-risk syncope features requiring hospital admission.

Used in: Syncope

Sustained SBP <90 mmHg, SOB, HR <50 or >100, chest pain, or radiographic pulmonary oedema

New focal neurological deficit or signs of subarachnoid haemorrhage

New arrhythmia, new ST changes, complete HB, new prolonged QTc, new LBBB or WPW

SBP <90 or HR <40 persisting without clear, reversible cause

Haematocrit <30%, severe diarrhoea/vomiting, blood loss

Score interpretation

Low Risk 0

No Boston high-risk features. Low risk. Consider discharge.

→ Discharge with appropriate follow-up.

High Risk — Admit 1–6

≥1 Boston criterion present. Admission recommended.

→ Admit for monitoring, further evaluation, and specialist review.

Interpretation bands for the Boston Syncope. Apply clinical judgement and local guidance.

References

Related

Curated clinical cross-links plus same-class fallbacks.

📚 MRCEM Revision

Featured in these MRCEM clinical pathways

The Boston Syncope is covered in detail — with RCEM/NICE evidence base, indications and pitfalls — in the following exam-focused pathways on our sister siteReviseMRCEM.

MRCEM Primary / Intermediate / OSCE candidates: each pathway includes exam-style questions, RCEM/NICE citations, and FAQ summaries.

Decision support only — verify against a current formulary, NICE, or your local guideline before clinical use.