Aortic Dissection

📋 Key Information Summary

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Aortic dissection is the most common acute aortic syndrome, with an incidence of approximately 3–4 per 100,000 person-years in Australia; mortality rises ~1–2% per hour if untreated in Type A.
Stanford classification divides dissections into Type A (involving the ascending aorta) and Type B (distal to the left subclavian artery); DeBakey types I, II, and III provide further anatomical detail.
Type A dissection is a surgical emergency — all confirmed cases require emergent open-heart repair at a cardiothoracic centre.
Type B dissection is managed medically in the first instance with strict heart rate (<60 bpm) and systolic BP (<120 mmHg) targets using IV beta-blockers (esmolol, labetalol).
CT angiography of the entire aorta is the first-line diagnostic investigation (sensitivity and specificity >95%); D-dimer has a high negative predictive value and can assist in ruling out dissection in low-risk patients.
Classic presentation is sudden-onset, severe, tearing chest pain radiating to the back, but presentations vary widely; always consider dissection in patients with acute chest pain and neurological deficits, pulse differentials, or new aortic regurgitation.
Pain character and location help differentiate Type A (anterior chest) from Type B (interscapular, back, abdomen).
Complications include cardiac tamponade, aortic regurgitation, malperfusion syndromes (stroke, mesenteric ischaemia, limb ischaemia), and rupture.
TEVAR (thoracic endovascular aortic repair) is indicated for complicated Type B dissections — malperfusion, rupture, refractory pain, or rapid aortic expansion.
Lifelong follow-up with serial cross-sectional imaging (CT or MRA) is essential for both Type A (post-surgical) and Type B patients to detect aneurysmal degeneration and late complications.
Aboriginal and Torres Strait Islander Australians have higher rates of cardiovascular disease and may present later; culturally safe care and access to tertiary centres are critical considerations.

Classification Systems

Accurate classification of aortic dissection guides immediate management decisions and determines whether surgical or medical therapy is appropriate. Two complementary classification systems are used in clinical practice: the Stanford and DeBakey systems.

Stanford Classification

The Stanford system is the most widely used in contemporary practice and is directly linked to management pathways. It divides dissections based on whether the ascending aorta is involved.

Type	Involvement	Approximate Frequency	Management
Stanford Type A	Ascending aorta (with or without descending involvement); any dissection involving the ascending aorta	~60–65%	Surgical emergency
Stanford Type B	Descending aorta only — origin distal to the left subclavian artery	~35–40%	Medical management ± TEVAR

DeBakey Classification

The DeBakey system provides finer anatomical granularity and is often cited alongside the Stanford system in surgical literature.

Type	Anatomy	Stanford Equivalent
DeBakey I	Originates in the ascending aorta, extends to the aortic arch and beyond (descending aorta)	Type A
DeBakey II	Confined to the ascending aorta only	Type A
DeBakey III	Originates distal to the left subclavian artery (IIIa: limited to descending; IIIb: extends below diaphragm)	Type B

Timing Classification

The temporal classification is critical for prognosis, as operative risk and mortality differ significantly by timing of presentation.

Acute

0–14 days from symptom onset

Highest mortality phase. Type A mortality ~1–2% per hour in the first 48 hours without surgery. Acute period further divided into hyperacute (<24 h) and acute (1–14 days).

Setting: Emergency — immediate ICU and surgical assessment

Subacute

15–90 days

Post-inflammatory phase. Intimal healing begins but the aortic wall remains fragile. Operative risk is lower than hyperacute but higher than chronic.

Setting: Planned surgical or TEVAR intervention

Chronic

>90 days from onset

Fibrotic remodelling of the false lumen. Risks include aneurysmal degeneration, late rupture, and malperfusion. Managed with serial imaging and risk-factor modification.

Setting: Outpatient surveillance by cardiothoracic/vascular team

⚠️

Clinical pearl: Any dissection involving the ascending aorta — regardless of extent — is classified as Stanford Type A and mandates urgent surgical consultation. The presence or absence of ascending involvement is the single most important classification criterion determining management.

Clinical Presentation

Aortic dissection is often called "the great masquerader" because of its protean manifestations. A high index of clinical suspicion is essential, particularly in patients presenting with acute chest pain and any high-risk features.

Pain Characteristics

Pain is the presenting symptom in >85% of cases. Its character and location provide important diagnostic clues:

Onset: Sudden, maximal intensity at onset ("thunderclap") — this distinguishes dissection from myocardial infarction, where pain typically crescendos over minutes to hours.
Character: Classically described as tearing or ripping; may also be sharp, stabbing, or pressure-like.
Type A location: Anterior chest pain, often radiating to the neck, jaw, or arms. May mimic acute coronary syndrome.
Type B location: Interscapular back pain, often radiating to the abdomen, flank, or lower extremities.
Migrating pain: Pain that migrates distally along the path of dissection propagation is highly suggestive but present in only ~15–20% of cases.

Physical Examination Findings

A systematic cardiovascular examination is critical and may reveal:

Finding	Mechanism	Significance
Pulse deficit	Dissection flap occluding branch vessel origin	Present in 15–30% of Type A; associated with malperfusion and worse prognosis
Blood pressure differential (>20 mmHg between arms)	Involvement of the brachiocephalic or left subclavian artery	Highly specific for dissection when present; measure in both arms
Wide mediastinum (CXR)	Enlarged aorta or haematoma	Suggestive but not diagnostic; normal CXR does not exclude dissection
New diastolic murmur	Aortic regurgitation from Type A dissection distorting the aortic root	Present in 30–50% of Type A; indicates need for concomitant valve surgery
Cardiac tamponade	Rupture of the ascending aorta into the pericardial space	Major cause of early death in Type A; Beck's triad (hypotension, muffled heart sounds, JVD)
Neurological deficits	Carotid artery malperfusion (stroke); spinal cord ischaemia	Stroke in ~5–10% of Type A; paraplegia in ~2–5% of Type B
Malperfusion syndromes	Branch vessel obstruction by false lumen expansion	Mesenteric (abdominal pain, lactic acidosis), renal (anuria, acute kidney injury), limb (ischaemia)

Complications by Type

Type A Complications

Cardiac tamponade (leading cause of death)
Acute aortic regurgitation (30–50%)
Acute coronary syndrome (right coronary ostium most common)
Stroke / transient ischaemic attack
Superior vena cava obstruction
Aortic rupture (into pleural space or mediastinum)

Type B Complications

Mesenteric ischaemia (high mortality)
Renal ischaemia / acute kidney injury
Lower limb ischaemia
Spinal cord ischaemia / paraplegia
Aortic rupture
Aneurysmal degeneration (late)

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High-risk features that mandate urgent imaging for dissection: Sudden-onset tearing/ripping chest or back pain AND any of: pulse deficit, BP differential >20 mmHg between arms, new aortic regurgitation murmur, wide mediastinum on CXR, focal neurological deficit, or malperfusion signs. Do NOT delay imaging for troponin results — troponin elevation may occur in Type A dissection with coronary involvement and can misdirect management towards PCI.

Diagnostic Imaging

Rapid and accurate diagnostic imaging is the cornerstone of aortic dissection management. The choice of modality depends on patient stability, local availability, and the clinical question.

Imaging Modalities

First-line

CT Angiography (CTA) — Aorta with Arterial Phase

Sensitivity: 95–100%; Specificity: 95–100%
Fast, widely available in Australian EDs 24/7
Provides complete aortic assessment from arch to bifurcation — identifies entry tear, false lumen, branch vessel involvement, and pericardial effusion
MBS Item 57354 (CT aorta — thoracic) and 57355 (abdominal) — Medicare-rebatable
Limitation: IV contrast (renal impairment), radiation exposure; not suitable for unstable patients who cannot be transported to CT

Available

Transoesophageal Echocardiography (TEE)

Sensitivity: 98–99%; Specificity: 95–97% for Type A
Can be performed at the bedside in the ICU — ideal for haemodynamically unstable patients
Excellent for identifying aortic regurgitation, pericardial effusion, and proximal (Type A) dissection
Limitation: Operator-dependent; limited views of the distal ascending aorta and proximal arch (blind spot); not reliable for Type B dissection involving the distal aorta
Requires sedation/intubation — not always feasible in unstable patients

Available

Magnetic Resonance Angiography (MRA)

Sensitivity: 98–100%; Specificity: 98–100%
Gold-standard for chronic dissection surveillance — no radiation, excellent soft-tissue contrast
NOT suitable for acute diagnosis — scan time is long (30–60 min), limited availability out-of-hours, and many patients cannot tolerate prolonged scanning
MBS Item 63501 (MRA thoracic aorta) — available at major tertiary centres
Contraindicated with certain metallic implants (pacemakers, older sternal wires); requires screening

Adjunct

Transthoracic Echocardiography (TTE)

Rapid bedside assessment — can identify pericardial effusion, aortic regurgitation, and proximal ascending aorta dilation
Sensitivity for dissection flap: Only 60–70% (limited acoustic windows)
A normal TTE does NOT exclude aortic dissection
Useful as an initial screening tool in the resuscitation bay while arranging definitive CTA

Role of D-dimer

ℹ️

D-dimer (fibrin degradation product) is elevated in >95% of acute aortic dissections. A negative D-dimer (<500 ng/mL using standard assay) has a high negative predictive value (~95–98%) and may be used to help rule out dissection in low-risk patients presenting within 24 hours of symptom onset.

Important caveats:

D-dimer should NOT be used as a standalone test to exclude dissection — it must be interpreted in the context of clinical pre-test probability.
D-dimer is non-specific — elevated in PE, MI, sepsis, malignancy, surgery, pregnancy, and many other conditions.
Sensitivity decreases with chronic dissection and with presentation >24 hours after onset.
A positive D-dimer in a patient with chest pain should prompt urgent cross-sectional imaging, not further D-dimer serial testing.

Diagnostic Algorithm

1

Clinical suspicion

Sudden severe chest/back pain with high-risk features (pulse deficit, BP differential, neuro deficit, wide mediastinum, new AR murmur)

2

Immediate CTA aorta

If high clinical suspicion — do not delay for D-dimer or troponin. Proceed directly to CT angiography of the entire aorta.

3

Haemodynamically unstable?

If the patient is too unstable for CT, perform bedside TEE in the ICU/OR. Simultaneously activate the cardiothoracic surgical team.

4

Low risk?

In patients with low pre-test probability, a negative D-dimer (<500 ng/mL) within 24 hours of onset may reasonably exclude acute dissection. If positive or indeterminate, proceed to CTA.

Type A Management — Emergency Surgical Repair

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Stanford Type A aortic dissection is a surgical emergency. Mortality increases approximately 1–2% per hour without intervention in the first 48 hours. All confirmed Type A dissections require emergent transfer to a cardiothoracic surgical centre. Medical management alone carries >50% mortality at 48 hours and >90% mortality at 30 days.

Immediate Medical Stabilisation

While arranging emergency surgical transfer, aggressive medical management to reduce aortic wall stress must be initiated simultaneously. The dual goals are heart rate control (<60 bpm) and systolic blood pressure reduction (100–120 mmHg), achieved primarily with IV beta-blockers.

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Esmolol

Brevibloc® · Ultra-short-acting IV beta-1 selective blocker

Adult dose Loading 500 µg/kg IV over 1 min, then infusion 50–200 µg/kg/min (titrate to HR <60 bpm)

Paediatric dose 100–500 µg/kg IV bolus, then 100–500 µg/kg/min infusion

Key advantages Rapid onset (~60 sec), offset within 10–20 min of stopping — easily titratable in unstable patients

Renal adjustment None required — metabolised by RBC esterases

PBS status ✔ PBS General Benefit

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Labetalol

Trandate® · Combined alpha- and beta-blocker (IV)

Adult dose Bolus 20 mg IV over 2 min, then 20–80 mg boluses every 10 min (max 300 mg), OR infusion 0.5–2 mg/min

Key advantages Combined alpha/beta blockade reduces both HR and BP; longer duration than esmolol

Renal adjustment No adjustment required

PBS status ✔ PBS General Benefit

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Sodium Nitroprusside

Nipride® · IV vasodilator (adjunctive only)

Adult dose 0.25–0.5 µg/kg/min IV, titrate by 0.5 µg/kg/min every 5 min (max 8–10 µg/kg/min)

Key consideration Must only be used AFTER adequate beta-blockade. Pure vasodilation without HR control causes reflex tachycardia and increased dP/dt, which worsens dissection propagation.

Monitoring Intra-arterial BP monitoring required; risk of cyanide toxicity with prolonged use (>72 h) or renal impairment

PBS status ✔ PBS General Benefit

⚠️

Avoid pure vasodilators (nitroprusside, GTN, hydralazine) without prior beta-blockade. Reflex tachycardia increases aortic shear stress (dP/dt) and may accelerate dissection propagation. Always initiate beta-blockade first.

Emergency Surgical Repair

The definitive treatment for Type A dissection is open surgical repair, performed via median sternotomy with cardiopulmonary bypass and often hypothermic circulatory arrest. The goals of surgery are to resect the primary entry tear and restore true lumen perfusion.

Surgical Techniques

Procedure	Indication	Description
Ascending aortic replacement (hemiarch)	Most Type A dissections — standard operation	Replace ascending aorta with a Dacron graft; open distal anastomosis during hypothermic circulatory arrest (18–28°C); reimplant coronary buttons
Root replacement (Bentall procedure)	Aortic root dilation or severe aortic regurgitation	Composite valve-graft replacement of the aortic root; mechanical or bioprosthetic valve
Valve-sparing root replacement (David procedure)	Aortic regurgitation with salvageable native valve (young patients)	Reimplant the native aortic valve into a Dacron graft — avoids lifelong anticoagulation
Total arch replacement ± frozen elephant trunk	Arch involvement, DeBakey I with extensive arch tear	Replace the aortic arch with a branched graft; frozen elephant trunk provides a landing zone for future TEVAR if needed

Surgical Outcomes (Australian and International Data)

Operative mortality: 15–25% at 30 days in high-volume centres (lower in experienced aortic centres); up to 30–40% in patients presenting with pre-operative malperfusion or tamponade.
Australian centres: Major aortic surgery is concentrated in tertiary hospitals in capital cities (Royal Prince Alfred, Royal Melbourne, Alfred Hospital, St Vincent's Sydney, Princess Alexandra Brisbane, Royal Adelaide). Transfer protocols exist via state retrieval services (e.g., NSW Health Critical Care, Ambulance Victoria MICA).
5-year survival: 70–85% after successful Type A repair in contemporary series.
Reintervention rate: 10–20% at 10 years — often for residual arch or descending aortic disease requiring TEVAR.

Special Considerations in Type A

ℹ️

Malperfusion syndrome in Type A: Up to 30% of Type A dissections present with malperfusion (coronary, cerebral, mesenteric, renal, or limb). Some centres advocate a "stent-first" approach — TEVAR to restore branch vessel perfusion followed by open ascending repair — though evidence is evolving.

Stroke with Type A: Patients with pre-operative stroke have higher surgical mortality but should generally still proceed to surgery. The stroke is often worsened by untreated dissection rather than by surgery itself. Decisions should be made in conjunction with neurology and neurosurgery.

Tamponade: Pericardiocentesis is generally contraindicated in Type A dissection with tamponade — decompression may worsen bleeding by relieving tamponade physiology. Emergency surgical repair is definitive treatment. Use cautious volume resuscitation and vasopressors as a bridge.

Type B Management

Type B aortic dissection (distal to the left subclavian artery) is managed differently from Type A. The initial approach is medical management with aggressive antihypertensive and heart rate control. Endovascular or open surgical intervention is reserved for complicated presentations.

Uncomplicated Type B — Medical Management

Target

Heart Rate

<60 beats per minute (first priority)

Achieved with IV beta-blockers — esmolol or labetalol

Target

Systolic Blood Pressure

100–120 mmHg (tolerated if end-organ perfusion maintained)

Add vasodilator (nitroprusside) if needed after beta-blockade established

IV Antihypertensive Agents for Acute Type B

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Esmolol

Brevibloc® · First-line IV beta-blocker

Adult dose 500 µg/kg IV bolus, then 50–200 µg/kg/min infusion

PBS status ✔ PBS General Benefit

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Labetalol

Trandate® · Alternative IV beta/alpha blocker

Adult dose 20 mg IV bolus, repeat 20–80 mg every 10 min (max 300 mg) or infusion 0.5–2 mg/min

PBS status ✔ PBS General Benefit

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Sodium Nitroprusside

Nipride® · Second-line IV vasodilator (after beta-blockade)

Adult dose 0.25–0.5 µg/kg/min IV, titrate to effect (max 8–10 µg/kg/min)

Key consideration ONLY after adequate beta-blockade; requires arterial line monitoring; risk of thiocyanate/cyanide toxicity in renal/hepatic impairment

PBS status ✔ PBS General Benefit

Transition to Oral Medications

Once the patient is stabilised (typically 24–48 hours), transition to oral long-acting agents for lifelong blood pressure control:

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Bisoprolol

Cardicor® / Monocor® · Selective beta-1 blocker

Adult dose 2.5–10 mg PO once daily; titrate to HR <60 bpm and SBP <120 mmHg

Renal adjustment Max 10 mg/day if eGFR <20 mL/min

PBS status ✔ PBS General Benefit

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Perindopril

Coversyl® · ACE inhibitor (add-on for BP control)

Adult dose 2.5–10 mg PO once daily

Renal adjustment Start 2.5 mg daily if eGFR <60 mL/min; monitor potassium and creatinine

PBS status ✔ PBS General Benefit

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Amlodipine

Norvasc® · Calcium channel blocker (add-on)

Adult dose 2.5–10 mg PO once daily

Renal adjustment No adjustment required

PBS status ✔ PBS General Benefit

Complicated Type B — Indications for TEVAR

Thoracic endovascular aortic repair (TEVAR) has transformed the management of complicated Type B dissection. It involves deployment of a covered stent-graft across the primary entry tear to redirect flow into the true lumen and promote false lumen thrombosis.

⚠️

Indications for TEVAR in Type B dissection (any of the following constitutes "complicated"):

Malperfusion syndrome: Mesenteric, renal, spinal cord, or lower limb ischaemia
Aortic rupture: Contained (periaortic haematoma) or free rupture
Refractory pain: Ongoing severe pain despite optimal medical therapy — suggests impending rupture or expansion
Rapid aortic expansion: Increase in aortic diameter ≥5 mm during the index admission
Periaortic haematoma: CT evidence of contained leak

TEVAR Procedure

Performed via femoral artery access (percutaneous or cutdown) under general anaesthesia in a hybrid operating theatre.
A covered stent-graft (e.g., Gore TAG®, Medtronic Valiant Captivia®) is deployed across the primary entry tear, typically covering the left subclavian artery origin if necessary.
Left subclavian artery coverage may require prior or concurrent revascularisation (carotid-subclavian bypass or chimney stent) if there is a patent left internal mammary artery graft or vertebrobasilar insufficiency.
Australian availability: TEVAR is available at major tertiary vascular/ cardiothoracic centres in all Australian state capitals. Case volume and outcomes are reported through the Australasian Vascular Audit (AVA).

TEVAR Outcomes

30-day mortality for TEVAR in complicated Type B: 10–15% (compared with 30–40% for open surgical repair).
Spinal cord ischaemia risk: 3–5% — mitigated by cerebrospinal fluid drainage in high-risk cases.
False lumen thrombosis achieved in 70–90% at 1 year.
Reintervention rate: 10–30% at 5 years — most commonly for endoleak or distal stent-induced new entry tears.

Routine Surveillance for Uncomplicated Type B

All patients with Type B dissection — whether managed medically or with TEVAR — require lifelong surveillance for aneurysmal degeneration of the false lumen.

Index admission

Baseline CTA aorta — document maximum aortic diameter, true/false lumen dimensions, entry tear location, and branch vessel patency.

1 month

CTA or MRA — assess early aortic remodelling, false lumen thrombosis, and any signs of expansion.

3 months

CTA or MRA — continue monitoring. Transition from monthly to less frequent scans if stable.

6 months

CTA or MRA — assess interval change. If stable and good false lumen thrombosis, extend interval.

12 months, then annually

Annual MRA (preferred for long-term — no radiation) or CTA. Continue for life. Consider more frequent imaging if false lumen remains patent or aortic diameter is increasing.

ℹ️

MRA vs CTA for surveillance: MRA is preferred for long-term follow-up to minimise cumulative radiation exposure, particularly in younger patients. CTA remains necessary if there are TEVAR stent-grafts (MRI-compatible stent-graft screening is required). Always confirm device MRI compatibility with the manufacturer before ordering MRA.

Special Populations

🤰

Pregnancy

Aortic dissection risk is highest in the third trimester and early postpartum period due to haemodynamic changes and hormonal effects on vascular connective tissue.
Patients with Marfan syndrome, Loeys-Dietz syndrome, or bicuspid aortic valve are at particularly elevated risk.
Diagnosis: CTA involves ionising radiation but should NOT be delayed — the risk of missed dissection outweighs fetal radiation risk. TEE is a reasonable alternative. MRA without gadolinium is the preferred follow-up modality.
Type A in pregnancy: Emergency surgery is indicated regardless of gestational age. Caesarean section may be performed immediately before or concurrently with aortic repair if the fetus is viable (≥28 weeks).
Type B in pregnancy: Medical management as per non-pregnant patients. Labetalol is the preferred beta-blocker in pregnancy. Avoid ACE inhibitors and ARBs (teratogenic). Avoid atenolol (fetal growth restriction concerns). Nitroprusside is contraindicated (fetal cyanide toxicity).
Multidisciplinary team: cardiothoracic surgery, obstetrics, neonatology, anaesthesia, and cardiology.

👶

Paediatrics

Aortic dissection in children is rare and almost always associated with underlying conditions: Marfan syndrome, Turner syndrome, Ehlers-Danlos syndrome, bicuspid aortic valve, or prior cardiac surgery.
Diagnosis is often delayed due to low clinical suspicion — maintain a high index in children with connective tissue disorders presenting with acute chest pain.
Management principles mirror adults: Type A → emergency surgery; Type B → medical management with TEVAR reserved for complicated cases.
Beta-blocker doses should be weight-adjusted. Esmolol 100–500 µg/kg/min infusion. Labetalol 0.2–1 mg/kg/hr IV.
Referral to a paediatric cardiothoracic centre is mandatory. In Australia: Royal Children's Hospital Melbourne, Children's Hospital Westmead, Queensland Children's Hospital.

👴

Elderly

Patients >70 years have significantly higher operative mortality for Type A repair (30–50% vs 15–20% in younger patients). However, conservative management carries near-universal mortality — surgery should still be offered unless significant comorbidities preclude survival.
TEVAR for complicated Type B may be preferred over open repair in the elderly due to lower perioperative morbidity.
Beta-blocker therapy: start at lower doses; increased risk of bradycardia and hypotension. Renally adjust all medications.
Consider frailty assessment, advance care planning, and goals-of-care discussions as part of shared decision-making.

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Renal Impairment

Contrast-induced nephropathy is a significant risk with CTA. Use low-osmolar contrast, pre-hydrate with IV normal saline (1 mL/kg/hr for 6–12 h pre- and post-scan), and minimise contrast volume.
MRA (without gadolinium) is preferred for follow-up imaging in CKD.
Sodium nitroprusside: risk of thiocyanate accumulation with prolonged use in CKD — monitor levels; prefer esmolol (renally independent metabolism).
Malperfusion of the renal arteries from the dissection itself may cause acute kidney injury — this is an indication for intervention (TEVAR or renal artery stenting).

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Hepatic Impairment

Labetalol: use with caution in severe hepatic impairment — reduced first-pass metabolism and risk of hypotension. Reduce dose and monitor closely.
Sodium nitroprusside: metabolised to cyanide then thiocyanate — impaired hepatic cyanide metabolism increases toxicity risk. Avoid in severe liver disease.
Esmolol (metabolised by RBC esterases) is preferred in hepatic impairment.
Coagulopathy from liver disease increases surgical bleeding risk — optimise coagulation pre-operatively with FFP, cryoprecipitate, and platelets as indicated.

🛡️

Connective Tissue Disorders

Marfan syndrome: Highest lifetime risk of dissection. Prophylactic aortic root replacement recommended when diameter ≥45 mm (with risk factors) or ≥50 mm. Lifelong beta-blockade or losartan (emerging evidence for TGF-β inhibition).
Loeys-Dietz syndrome: Aggressive aortopathy — dissection at smaller diameters. Prophylactic surgery at ≥40–42 mm depending on variant.
Vascular Ehlers-Danlos syndrome (type IV): High surgical morbidity due to tissue fragility. Celiprolol (not PBS-listed in Australia) has evidence for reducing vascular events. TEVAR may be considered but vessel access complications are common.
Turner syndrome: Bicuspid aortic valve and aortic dilation are common — regular imaging surveillance from adolescence.
Genetic aortopathy screening: first-degree relatives of patients with non-traumatic Type A dissection should be offered screening (aortic imaging ± genetic testing).

Aboriginal and Torres Strait Islander Health Considerations

Aboriginal and Torres Strait Islander Health

Cardiovascular disease burden

Aboriginal and Torres Strait Islander Australians experience cardiovascular disease at 1.5–2 times the rate of non-Indigenous Australians (AIHW 2023). While aortic dissection-specific data are limited, the higher prevalence of hypertension, smoking, rheumatic heart disease, and late-presenting cardiovascular conditions increases dissection risk and delays in diagnosis.

Hypertension and risk factors

Hypertension is more prevalent and often poorly controlled in remote Indigenous communities. Smoking rates remain 2–3 times higher than the non-Indigenous population. Type 2 diabetes, chronic kidney disease, and rheumatic heart disease — all of which may complicate presentation or management — are significantly more common.

Access to surgical services

Cardiothoracic surgery for Type A dissection is only available in major tertiary centres (all capital cities). For patients in remote and very remote communities, transfer times may be prolonged by many hours. Royal Flying Doctor Service (RFDS) and state retrieval services (e.g., CareFlight, QGAP) are critical. Communication with the receiving surgical team should begin as early as possible — "scoop and run" rather than "stay and play."

Diagnostic delays

Access to CT angiography may be limited in rural and remote hospitals. Point-of-care TTE and telemedicine support from tertiary centres can assist in preliminary assessment. D-dimer testing may be available at regional hospitals and can support decision-making about urgent transfer.

Culturally safe care

Ensure the involvement of Aboriginal and Torres Strait Islander health workers and liaison officers during acute care and follow-up. Respect cultural obligations including sorry business, connection to country, and family decision-making structures. Provide clear, jargon-free communication and consider health literacy when explaining surgical consent. Involve family and community in discharge planning.

Follow-up and medication adherence

Lifelong blood pressure control and imaging surveillance are essential after dissection. Remote patients may face barriers to regular follow-up including distance to specialist services, limited pharmacy access, and competing health priorities. Consider PBS Close the Gap co-payment support to reduce medication costs. Use telehealth and visiting specialist outreach (e.g., via the Outreach Rheumatology and Cardiology programs) to improve follow-up rates.

📚 References

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