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Cardiology Emergency Medicine

Aortic Dissection Detection Risk Score (ADD-RS)

Risk-stratifies patients with suspected acute aortic dissection. Score 0 = very low risk; allows rule-out without CT.

Marfan syndrome, connective tissue disease, family history of aortic disease, known aortic valve disease, recent aortic manipulation, or known thoracic aortic aneurysm

Chest, back, or abdominal pain described as abrupt onset AND severe/worst-ever/tearing/ripping

Pulse deficit, focal neurological deficit, new aortic regurgitation murmur, or hypotension/shock

Score interpretation

Very Low Risk 0

ADD-RS 0: Very low probability of acute aortic dissection. Consider alternative diagnoses.

→ May proceed with aortic biomarker (D-dimer) testing per ADD-RS low-risk pathway. CT not mandatory if D-dimer negative.

Intermediate Risk 1

ADD-RS 1: Intermediate probability. CT aorta required.

→ Urgent CT angiography of aorta (triple rule-out or ECG-gated chest/abdomen/pelvis CT).

High Risk 2–3

ADD-RS 2–3: High probability of acute aortic dissection.

→ Immediate CT aorta. Activate aortic surgery team. BP control (target SBP 100–120 mmHg). Type and cross-match.

Interpretation bands for the ADD-RS. 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 ADD-RS 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.