Few medical emergencies unfold as fast — or as quietly — as an aortic dissection. It is a sudden tear in the wall of the aorta, the body's largest artery, and without rapid treatment it can be fatal within hours. Recognizing the warning signs early and getting immediate care is often the difference between life and death. Here is what every adult should understand about aortic dissection: the symptoms, who is at risk, and what to do.
What is an aortic dissection?
Your aorta is the large artery that carries blood from your heart to the rest of your body, and its wall has three layers. In an aortic dissection, a tear develops in the innermost layer and blood surges into the wall itself — forcing the layers apart and creating a second, “false” channel. This weakens the aorta, can block blood flow to vital organs, and can lead to a catastrophic rupture. It is a true emergency: for the most dangerous type, the risk of death rises with every hour it goes untreated.
Type A vs. Type B — why location matters
Doctors classify dissections by where they occur:
- Type A involves the ascending aorta (the part closest to the heart). This is the more dangerous form and almost always requires emergency surgery.
- Type B involves only the descending aorta. Many Type B dissections can be managed with medication to control blood pressure, though some require a procedure.
Warning signs and symptoms
The classic symptom is sudden, severe pain — often described as tearing, ripping, or stabbing — in the chest or upper back, sometimes moving as the tear extends. Symptoms can vary and may include:
- Sudden, intense chest or back pain, often between the shoulder blades
- A tearing or ripping sensation
- Pain that migrates or spreads
- Shortness of breath
- Fainting or lightheadedness
- Sudden weakness or numbness on one side, or trouble speaking (stroke-like symptoms)
- A weak or absent pulse, or very different blood pressure, in one arm versus the other
Because it can mimic a heart attack, dissection is sometimes missed. If you or someone near you has sudden, severe, tearing chest or back pain, call 911 immediately.
Who is at risk?
The single biggest risk factor is chronic high blood pressure, which stresses the aortic wall over time. Other important risk factors include:
- An existing aortic aneurysm (a bulge in the aorta)
- Inherited connective-tissue conditions such as Marfan syndrome, Loeys-Dietz syndrome, or vascular Ehlers-Danlos syndrome
- A bicuspid aortic valve (a valve with two leaflets instead of three)
- A family history of aortic dissection or aneurysm
- Older age, and being male
- Smoking, and in some cases cocaine or other stimulant use
- Serious chest trauma
- Pregnancy, particularly in women with underlying aortic disease
How it is diagnosed
When a dissection is suspected, imaging must be fast. A CT angiogram is the most common test — it produces detailed pictures of the aorta in minutes. A transesophageal echocardiogram (a specialized ultrasound) or an MRI may also be used depending on the situation.
How it is treated
Aortic dissection is treated by surgeons, and which specialist leads depends on the type:
- Type A dissections are surgical emergencies handled by cardiac (cardiothoracic) surgeons, who repair or replace the damaged section of the ascending aorta — sometimes along with the aortic valve.
- Type B dissections without complications are often managed first with medication — especially beta-blockers — to lower blood pressure and heart rate and reduce stress on the aorta. When a procedure is needed, vascular surgeons typically treat the descending aorta, often with a minimally invasive stent-graft (TEVAR).
A cardiologist frequently plays a central role before and after treatment — identifying who is at risk, controlling blood pressure, coordinating imaging, and providing the lifelong follow-up these patients need.
Can aortic dissection be prevented?
Not every dissection is preventable, but you can meaningfully lower your risk:
- Keep your blood pressure under control — the most important step.
- Do not smoke.
- If you have an aortic aneurysm, follow your cardiologist's monitoring schedule; aneurysms can often be repaired electively before they dissect.
- If aortic disease runs in your family, or you have a connective-tissue condition or a bicuspid valve, ask about screening imaging and, when appropriate, genetic evaluation.
Regular check-ups matter — many people do not know they have high blood pressure or an aneurysm until a problem occurs. A cardiologist can assess your risk and, when needed, image your aorta with an echocardiogram or CT scan.
When to call 911
Aortic dissection is not something to “wait out.” Call 911 right away for:
- Sudden, severe, tearing or ripping chest or upper-back pain
- Chest pain with fainting, shortness of breath, or stroke-like symptoms
- Severe pain that moves or spreads
Every minute counts — prompt treatment saves lives.
Frequently asked questions
What does aortic dissection pain feel like?
Most people describe a sudden, severe tearing or ripping pain in the chest or upper back that may move as the tear extends. It typically comes on abruptly and intensely, unlike the gradual buildup of many other conditions.
Can you survive an aortic dissection?
Yes. With rapid diagnosis and treatment, survival is possible and many people recover well. The key is speed — Type A dissections in particular are emergencies where every hour matters, so call 911 immediately.
What is the main cause of aortic dissection?
Chronic high blood pressure is the most common contributor, because it stresses and weakens the aortic wall over time. Aneurysms, inherited connective-tissue conditions, and a bicuspid aortic valve also raise the risk.
Is an aortic dissection the same as a heart attack?
No. A heart attack is a blockage of blood flow to the heart muscle, while an aortic dissection is a tear in the wall of the aorta. They can feel similar, which is why sudden, severe chest pain always needs emergency evaluation.
How can I lower my risk of aortic dissection?
Control your blood pressure, do not smoke, and — if you have an aneurysm, a family history of aortic disease, or a connective-tissue condition — stay on top of screening and monitoring with your cardiologist.