Introduction
Aortic dissection occurs when the inner layer of the aortic wall tears and blood forces into the middle layer, creating a false lumen. It is not the same as aortic stenosis (a narrowed valve). Dissection is an acute emergency; delay can lead to rupture and fatal internal bleeding.
Classic pain is sudden, severe chest or back pain—often described as tearing or ripping—that may radiate to the neck, back, or abdomen. Breathlessness, one-sided weakness or paralysis, fainting, and cold or numb limbs can appear depending on which branch arteries lose flow.
Major risks include long-standing high blood pressure, aortic aneurysm, connective-tissue syndromes (Marfan, vascular Ehlers–Danlos, Loeys–Dietz), bicuspid aortic valve, blunt chest trauma, cocaine or stimulants, pregnancy (rare), older age, and male sex.
This page is general education. Sudden tearing chest or back pain needs ambulance or emergency care—do not drive yourself, and do not self-treat as a simple heart attack with aspirin until clinicians evaluate.
Overview
Dissection is a mechanical tear of the aortic wall with a false lumen—seconds-to-minutes matter.
Stanford Type A involves the ascending aorta and usually needs emergency surgery; Type B involves the descending aorta and often starts with blood-pressure control, with endovascular or open repair if complicated.
Survival rises sharply with rapid CT angiography and type-specific treatment.
- Pathology: intimal tear → false lumen (not valve narrowing)
- Classification: Stanford A (ascending) vs B (descending)
- Risks: hypertension, connective-tissue disease, aneurysm, older men
- Symptoms: sudden tearing chest/back pain, dyspnoea, neurologic signs, shock
- Diagnosis: urgent CT angio first-line; TEE/MRI alternatives; ECG to separate MI
- Treatment: Type A → surgery; Type B → BP control ± TEVAR/surgery
What happens in the body
The aorta has three wall layers. High pressure or a weak media lets an intimal tear allow blood to split the layers and extend a flap or false channel. That false lumen can compress branch arteries—coronary, carotid, renal, spinal—causing organ ischaemia.
When the ascending aorta is involved, aortic regurgitation, coronary occlusion, or pericardial tamponade can occur—why untreated Type A has very high mortality. Stenosis is a slow valve-opening problem; dissection is an acute wall tear.
- Intimal tear → expanding false lumen
- Branch occlusion → brain, kidney, or limb ischaemia
- Type A → highest cardiac complication and rupture risk
- Stenosis ≠ dissection: narrowed valve vs torn wall
Signs and symptoms
Features vary with location and extent—treat the following as emergencies:
- Sudden severe chest pain—tearing or ripping quality
- Pain radiating to back, neck, or abdomen
- Shortness of breath
- Fainting or near-fainting
- One-sided weakness, paralysis, or slurred speech
- Cold, numb, or pulse-poor arm or leg
- Very high or low blood pressure, or large arm-to-arm pressure difference
- Sweating, nausea, extreme restlessness
- Stroke-like symptoms when brain flow is compromised
- Severe abdominal pain if the abdominal aorta is involved
- Heart-attack–like chest pain if coronary flow is affected
- Sudden back/leg pain or paralysis from spinal ischaemia
Causes and risk factors
Anything that weakens the wall or sharply raises pressure raises risk:
- Chronic hypertension—the most common modifiable risk
- Aortic aneurysm or prior aortic disease
- Genetic syndromes: Marfan, vascular Ehlers–Danlos, Loeys–Dietz, and related
- Bicuspid aortic valve and other congenital aortic anomalies
- Blunt chest trauma or rare catheter/surgical injury
- Cocaine or other stimulants causing abrupt pressure spikes
- Pregnancy or peripartum pressure stress (uncommon but important)
- Older age, male sex, smoking, and atherosclerosis
Diagnosis and evaluation
Suspicion must trigger fast imaging—symptoms alone are not diagnostic:
- Urgent history and exam: shock, pulse deficit, neurologic signs
- ECG and troponin to evaluate concurrent or mimicking myocardial infarction
- CT angiography—most common rapid confirmatory test
- Transoesophageal echo (TEE) for unstable patients or operating-room settings
- MRI when contrast allergy or selected stable cases require it
- Labs: kidney function, electrolytes, blood count for complications
- Differential: myocardial infarction, pulmonary embolism, aneurysm without dissection, pericarditis
Treatment and management
Type and complications drive care—every minute counts:
- Emergency stabilisation: oxygen, IV access, pain control, monitoring
- Rapid blood-pressure and heart-rate control—beta-blockers usually first-line as directed
- Type A: emergency open surgical repair or graft replacement
- Uncomplicated Type B: medical therapy plus intensive monitoring
- Complicated Type B (malperfusion, rupture threat): TEVAR or surgery
- Organ-specific interventions when branch ischaemia persists
- Post-operative ICU care and lifelong blood-pressure targets
- Genetic counselling and family screening discussion when connective-tissue disease is found
Prevention, self-care, and lifestyle
Not every condition is fully preventable, but the steps below may lower risk or recurrence:
- Measure and treat blood pressure to target—highest-yield prevention
- Stop smoking; avoid cocaine and stimulants
- Heart-healthy diet lower in salt and saturated fat
- Weight control and clinician-approved activity
- Regular imaging follow-up if you have Marfan or known aortic disease
- Do not miss surveillance or treatment appointments for known aneurysm
Possible complications
Delay, missed care, or unsafe self-medication can raise the chance of complications in some cases:
- Aortic rupture—catastrophic internal bleeding and death
- Stroke or spinal-cord ischaemia with lasting neurologic injury
- Kidney failure, bowel ischaemia, or other organ failure
- Aortic regurgitation, tamponade, heart failure (especially Type A)
- Shock and acute kidney injury in the short term
- Chronic hypertension, pain, recurrent dissection, or further surgery long term
When to see a doctor or seek emergency care
Seek prompt medical advice or emergency care if any of the following apply—it is safer not to wait and see:
- Sudden severe tearing chest or back pain
- Loss of consciousness or near-fainting
- Slurred speech, one-sided weakness or paralysis
- Sudden breathlessness or shock signs (cold sweat, weak pulse)
- Large blood-pressure difference between arms or lost pulses
- Known aneurysm or Marfan syndrome with new severe pain
- After aortic surgery: new severe pain or neurologic symptoms—return urgently
Living with the condition
Survivors can live full lives, but blood-pressure control and scheduled imaging follow-up are often lifelong. Avoid heavy lifting or intense straining unless your team clears it.
Take beta-blockers or other prescribed medicines regularly—do not stop abruptly. Stay smoke-free. Teach family emergency symptoms and any genetic risk for relatives.
Anxiety after a near-death event is common; cardiac rehabilitation and counselling help. New chest or back pain is never a “wait and see” moment.
Frequently asked questions
How does aortic dissection differ from stenosis?
Dissection is a tear in the aortic wall—an acute emergency. Stenosis is narrowing of the aortic valve—usually a slowly progressive valve disease. Pain patterns and treatments differ.
How is dissection diagnosed?
When suspected, CT angiography is the usual rapid test; TEE helps unstable patients. ECG helps evaluate heart attack as a mimic or companion problem.
Does every dissection need surgery?
Type A almost always needs emergency surgery. Uncomplicated Type B often starts with medicines to control pressure; stents or surgery are added if complications develop.
Can it run in families?
Connective-tissue syndromes and some familial aortic diseases raise risk—discuss screening if relatives are affected.
What prevention step matters most?
Blood-pressure control and not smoking. Known aneurysm or genetic risk needs scheduled follow-up.
When is emergency help mandatory?
Sudden tearing chest/back pain, fainting, stroke signs, or severe breathlessness require immediate emergency care.
Important caution
This article is general health education in English. It is not a personal emergency protocol.
If aortic dissection is possible, every minute matters—go to emergency care.
Early diagnosis and type-specific treatment markedly improve survival.