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Educational draft · awaiting clinical reviewUse Rapid for revision, not patient-care decisions. Check current national and local guidance and the BNF or BNFC before acting.

Acute aortic syndromes

Cardiology · UK scope · Sources checked 25 Aug 2026 · Clinical review pending

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Escalate

Any credible acute aortic syndrome is a time-critical emergency. Call the aortic/cardiothoracic and critical-care teams while arranging ECG-gated CT angiography from neck to pelvis; unstable patients may need bedside TOE. Ascending-aorta involvement is an emergency surgical disease. Do not let analgesia, D-dimer or blood-pressure treatment delay imaging or transfer.

Synopsis

Recognise aortic dissection, intramural haematoma and penetrating aortic ulcer early; obtain definitive imaging; begin safe anti-impulse therapy and trigger immediate aortic-team treatment.

  • Acute aortic syndromes comprise classic dissection, intramural haematoma and penetrating atherosclerotic ulcer; each may rupture or cause branch-vessel malperfusion.
  • Stanford type A involves the ascending aorta; type B does not. The classification predicts the immediate treatment pathway.
  • Think of AAS when severe chest, back or abdominal pain is abrupt and maximal at onset, especially with a pulse/BP deficit, focal neurology, syncope, shock or new aortic regurgitation.
  • Normal ECG, chest radiograph, troponin or D-dimer does not safely exclude AAS when clinical probability is high.
  • Preferred definitive imaging is ECG-gated CTA from neck to pelvis to define the entry tear, full extent, rupture and coronary, cerebral, visceral, renal or limb malperfusion.
  • Begin analgesia and anti-impulse therapy in a monitored setting: typical goals are heart rate 60/min or lower and systolic BP below 120 mmHg, or the lowest pressure that maintains organ perfusion.
  • Control heart rate with an IV beta-blocker before adding a vasodilator; vasodilation alone may provoke reflex tachycardia and increase aortic shear.
  • Type A AAS requires emergency surgical assessment. Complicated type B disease generally requires urgent endovascular repair when anatomy permits; uncomplicated type B begins with optimal medical therapy and close surveillance.
  • Survivors need lifelong BP control and aortic imaging, commonly at 1, 6 and 12 months and then annually if stable.

Key red flags

High-risk pain

Abrupt, severe pain maximal at onset in the chest, interscapular back or abdomen; pain may migrate as dissection extends. Painless presentations occur, especially with syncope or neurological deficit.

High-risk examination

Pulse deficit, inter-arm pressure difference, focal neurological deficit, new early diastolic murmur, shock, tamponade, acute pulmonary oedema or signs of limb/mesenteric/renal ischaemia.

High-risk history

Known aneurysm or aortopathy, bicuspid valve, coarctation, family history of aortic disease, recent aortic/cardiac procedure, pregnancy/postpartum state, cocaine or major deceleration injury.

Complicated type B features

Rupture/impending rupture, organ or limb malperfusion, persistent or recurrent pain, uncontrolled hypertension despite treatment, rapid expansion or shock require urgent aortic-team intervention.

Alternative diagnoses do not exclude AAS

ST changes, troponin elevation, stroke signs or abdominal findings can result from dissection. Thrombolysis or antithrombotic escalation before considering AAS may be catastrophic.

Investigation priorities

01
Immediate ABCDE assessment, both-arm BP and complete pulse/neurological examinationFirst step

Identify shock, tamponade, acute AR and dynamic malperfusion while preparing definitive imaging.

02
ECG-gated CT angiography from neck to pelvisPreferred

Preferred rapid anatomical test in most suspected AAS.

Management branches

Immediate / protocol-dependentSuspected AAS before anatomy is known

Credible high-risk pain, history or examination feature.

  1. Activate emergency, aortic/cardiothoracic, anaesthetic and critical-care pathways; use two large-bore IVs, continuous ECG, oxygen saturation and frequent BP, with an arterial line when expertise is available.
  2. Give titrated IV opioid analgesia and obtain urgent ECG-gated CTA neck-to-pelvis; use bedside TOE if too unstable for CT. Inform the receiving aortic centre early and do not delay transfer for nonessential tests.
  3. Start IV beta-blockade if haemodynamics permit. Target heart rate 60/min or lower, then systolic BP below 120 mmHg or the lowest pressure maintaining organ perfusion.
  4. If BP remains above target after rate control, add a titratable IV vasodilator such as nicardipine. Do not start a vasodilator before controlling tachycardia.
  5. If shock is present, search immediately for rupture, tamponade, severe AR or malperfusion; avoid reflexively lowering BP and expedite operative control.
Preferred interventionStanford type A

Any acute syndrome involving the ascending aorta, including dissection or intramural haematoma.

Key medicines

Labetalol IV50 mg IV over at least 1 minute, often over 1–2 minutes; repeat after 5 minutes if necessary to a usual maximum cumulative 200 mg. A specialist infusion around 15–20 mg/hour may be titrated to target.Avoid or seek senior advice with cardiogenic shock, severe bradycardia, second/third-degree block, decompensated heart failure or active bronchospasm. Severe acute AR and borderline perfusion demand specialist titration.
Esmolol IV500 micrograms/kg/min for 1 minute, then 50 micrograms/kg/min for 4 minutes; if needed repeat the loading dose and increase maintenance stepwise to 100, 150 then 200 micrograms/kg/min at 5-minute intervals.Critical-care use only; bradycardia, block, shock and decompensated heart failure. AAS use and loading strategy should follow the aortic/critical-care protocol.
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Sources and review status7 sources · checked 25 Aug 2026 · clinical review pending+
Sources

Sources and review status

National guidance is shown before implementation-dependent detail. Typical adult dose examples remain subject to patient factors, contraindications and the live BNF or specialist protocol. Source check completed 25 Aug 2026; clinical approval remains outstanding.

  • 2024 ESC Guidelines for peripheral arterial and aortic diseasesPrimary European guidance used where a current NICE acute-aortic-syndrome guideline is absent.
  • EACTS/STS Guidelines for acute and chronic syndromes of the aortic organ
  • British and Irish Hypertension Society position document: hypertensive crisisUK specialty source for acute AAS haemodynamic targets and IV options.
  • Labetalol injection SmPC
  • Esmolol infusion SmPC
  • Nicardipine infusion SmPC
  • Morphine sulfate injection SmPC

Editorial contact: Doctor’s Passport editorial team. Source-check date is separate from clinical approval. Report a content problem · Content changes

Authoring stateRapid draftClinical stateAwaiting reviewJurisdictionUnited Kingdom
Continue analgesia and carefully titrated anti-impulse therapy only while arranging emergency surgery; medical treatment is a bridge, not definitive care.
  • Correct major coagulopathy and prepare blood products without delaying theatre. Coronary, cerebral and visceral malperfusion require a multidisciplinary operative strategy.
  • Pericardiocentesis for tamponade is generally avoided before definitive repair because full decompression can precipitate fatal bleeding; any controlled drainage is an aortic-surgeon decision.