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Rapidthoracic aortaaortopathybicuspid aortic valveMarfan syndromeaortic dissection

Thoracic aortic aneurysm

Essential points for quick revision.

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Escalate

Abrupt severe chest, back or interscapular pain, pulse/BP asymmetry, neurological deficit, syncope, acute aortic regurgitation or shock suggests acute aortic syndrome rather than uncomplicated aneurysm: activate the acute aortic pathway and obtain immediate specialist imaging/advice.

Synopsis

Recognise thoracic aortic dilatation, identify heritable and valve-associated disease, plan imaging surveillance and know when urgent or surgical review is needed.

  • Thoracic aortic aneurysm is usually silent and found on echocardiography, CT or MRI; symptoms may reflect compression, valve disease or impending complication.
  • Confirm the involved segment and obtain reproducible orthogonal measurements; echocardiography assesses the root/ascending aorta and valve, while CT or MRI maps the whole thoracic aorta.
  • At diagnosis, look for bicuspid aortic valve, coarctation, syndromic features and a family history of thoracic aneurysm, dissection or sudden unexplained death.

Key red flags

Acute aortic syndrome

Abrupt maximal-at-onset chest/back pain, migrating pain, pulse deficit, focal neurology, syncope, shock or new diastolic murmur requires emergency assessment.

Investigation priorities

01
Transthoracic echocardiographyFirst step

Measure the root/proximal ascending aorta and assess aortic valve morphology, regurgitation and LV response.

Management branches

emergencyPossible acute aortic syndrome

Sudden severe chest/back pain or aneurysm plus neurological, perfusion, valve or shock features.

  1. First: immediate ABC assessment, monitoring, IV access, analgesia and senior cardiothoracic/vascular contact.
  2. Next: urgent ECG-gated CTA from chest through the aorta when feasible; use TOE/MRI only when clinically appropriate and without harmful delay.
surveillanceStable aneurysm follow-up

Below an intervention threshold and without acute features.

Key medicines

Beta-blocker (example: bisoprolol)For the licensed hypertension indication, a typical bisoprolol regimen starts at 5 mg orally once daily; the usual dose is 10 mg once daily and the SmPC maximum is 20 mg once daily. An aortopathy specialist may select a lower start according to heart rate and BP.
Losartan50 mg orally once daily, increased to 100 mg once daily if required and tolerated.
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Sources and review status5 sources · checked 27 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 27 Aug 2026; clinical approval remains outstanding.

Authoring stateRapid draftClinical stateAwaiting reviewJurisdictionUnited Kingdom