Aortic Dissection: Causes, Symptoms, Diagnosis, and Treatment Everything You Need to Know

There are medical emergencies that give you hours to respond. And then there are the ones that give you minutes.

It is one of the most catastrophic cardiovascular events a human body can experience, sudden, violent in its onset, and fatal in a significant number of cases before the patient ever reaches a hospital. Yet for all its severity, aortic dissection remains poorly understood by the general public. Most people have never heard of it until it happens to someone they know.

This guide changes that. If you live with high blood pressure, have a family history of aortic disease, or simply want to understand one of the most serious conditions in cardiovascular medicine read this carefully.

At Felix Hospital, is one of the leading cardiology hospitals in Noida, our cardiovascular team manages complex cardiac emergencies including aortic dissection with a protocol-driven, time-critical approach. Knowing what aortic dissection is, what it feels like, and what to do about it could be the difference between life and death for you or someone near you.

What Is Aortic Dissection?

The aorta is the largest artery in the human body. It originates directly from the left ventricle of the heart, arches upward through the chest, and then descends through the abdomen before branching into the arteries that supply the legs. Every heartbeat pushes blood through it at significant pressure. Over a lifetime, the aortic wall handles billions of such pulses.

That wall is made of three layers: the intima (innermost), the media (middle, muscular layer), and the adventitia (outermost). In a healthy aorta, these layers move together as one.

In an aortic dissection, a tear forms in the innermost layer the intima. Blood under high arterial pressure surges through that tear and forces its way between the intima and the media, creating a false channel called a false lumen running alongside the true lumen. As blood continues to pump into this false channel with every heartbeat, the dissection propagates sometimes within seconds along the length of the aorta.

The consequences depend on how far the dissection travels and which vessels it compromises. If it cuts off blood supply to the coronary arteries, the result is a heart attack. If it reaches the arteries supplying the brain, stroke follows. If it ruptures through the outer wall of the aorta entirely, massive internal haemorrhage usually fatal occurs.

This is why aortic dissection is a true surgical emergency. Every minute matters.
 

Types of Aortic Dissection

Aortic dissections are classified using two primary systems: the Stanford Classification and the DeBakey Classification. Stanford is more commonly used in clinical practice today.

Stanford Classification

Type A Involves the ascending aorta This is the more dangerous and more common type. The tear originates in or extends into the ascending aorta, the portion of the aorta that rises from the heart before the arch. Type A dissections carry a mortality rate of approximately 1 to 2 percent per hour in the first 24 to 48 hours without surgical treatment. Emergency open-heart surgery is almost always required.

Type B Involves the descending aorta only The tear is confined to the descending aorta beyond the left subclavian artery and does not involve the ascending aorta. Type B dissections are typically managed medically in the first instance, though complicated cases (involving organ ischaemia, rupture, or rapid expansion) require endovascular or surgical intervention.

DeBakey Classification

• Type I Originates in the ascending aorta and extends to the descending aorta (or beyond)

• Type II Confined to the ascending aorta

• Type III Originates in the descending thoracic aorta (IIIa: confined to thorax; IIIb: extends to abdomen)

Understanding which type a patient has is the first critical step in determining their treatment pathway and it must happen fast.

Causes of Aortic Dissection

Aortic dissection does not happen randomly to otherwise healthy arteries. In virtually every case, there is an underlying reason why the aortic wall was vulnerable enough to tear.

Chronic hypertension (high blood pressure) is by far the most common cause. Sustained high pressure especially when poorly controlled progressively degenerates the media layer of the aortic wall over years. When the wall weakens sufficiently, even a normal blood pressure spike can trigger a tear. Approximately 70 to 80 percent of aortic dissection patients have a history of hypertension.

Connective tissue disorders particularly Marfan syndrome and Ehlers-Danlos syndrome directly affect the structural integrity of the aortic wall. People with Marfan syndrome are tall, long-limbed, have a characteristic appearance, and carry a significantly elevated lifetime risk of aortic dissection, often at a younger age. This is the group in whom dissections occur in their 30s and 40s, sometimes without warning.

Bicuspid aortic valve a congenital abnormality where the aortic valve has two leaflets instead of the normal three is associated with abnormal aortic wall structure and an increased risk of both aortic aneurysm and dissection.

Aortic aneurysm a persistent bulging and dilation of the aortic wall is itself a precursor to dissection. The larger the aneurysm, the greater the wall tension and the higher the risk of dissection or rupture.

Blunt chest trauma severe injuries to the chest, such as those sustained in high-speed road accidents, can cause acute aortic injury including dissection.

Cocaine and stimulants use these to cause sudden, dramatic spikes in blood pressure and heart rate that can stress even a relatively healthy aortic wall enough to cause a tear.

Pregnancy aortic dissection during pregnancy is rare but recognised, particularly in the third trimester and peripartum period, and is more common in women with underlying connective tissue disorders.

Inflammatory aortitis including giant cell arteritis and Takayasu arteritis can weaken the aortic wall structurally.
Previous aortic surgery or cardiac catheterisation iatrogenic dissection, though uncommon, is a recognised complication of procedures involving the aorta.

Risk Factors for Aortic Dissection

Understanding who is at risk allows for targeted screening, lifestyle modification, and preventive medical therapy all of which genuinely reduce the risk of an event.

The key risk factors include:

• Uncontrolled or poorly controlled hypertension the single largest modifiable risk factor

• Age incidence peaks between 60 and 70 years in patients without connective tissue disease

• Male sex men are affected approximately two to three times more frequently than women

• Family history of aortic dissection or aortic aneurysm

• Marfan syndrome, Ehlers-Danlos syndrome, Loeys-Dietz syndrome, or other connective tissue disorders

• Bicuspid aortic valve a congenital abnormality present from birth

• Pre-existing aortic aneurysm particularly when the aortic diameter exceeds 5 to 5.5 cm

• Atherosclerosis plaque buildup in the aortic wall disrupts wall integrity

• Turner syndrome a chromosomal condition in females associated with aortic abnormalities
• History of cardiac surgery prior aortic procedures alter the wall's structural behaviour
• Smoking damages arterial wall structure and accelerates atherosclerosis
• Heavy weightlifting or extreme physical exertion causes acute pressure surges
• Stimulant drug use cocaine, amphetamines

If you carry two or more of these risk factors particularly hypertension alongside a connective tissue disorder or family history a cardiovascular evaluation at a specialist centre is not optional. It is a priority.

Symptoms of Aortic Dissection

Symptoms of Aortic Dissection

If there is one thing about aortic dissection symptoms that every person should know, it is this: the pain is unlike anything else.

Patients and physicians who have seen aortic dissection consistently describe the presenting pain the same way: sudden, severe, tearing or ripping in character, felt in the chest, the back between the shoulder blades, or both simultaneously. It often begins at maximum intensity immediately, not building gradually like a muscle cramp or a typical headache, but arriving at full force in an instant.

This "thunderclap" quality of onset is one of the most important clinical features. When someone describes chest or back pain that began with this sudden, maximal quality especially in a person with known hypertension or a connective tissue disorder aortic dissection must be considered until proven otherwise.

Common symptoms include:

• Sudden, severe chest pain often described as tearing, ripping, or stabbing; felt in the front of the chest in Type A dissections
• Sudden, severe back pain particularly between the shoulder blades; more common in Type B dissections
• Pain that migrates moving from the chest downward to the abdomen and legs as the dissection propagates
• Unequal blood pressure or pulse between the two arms a classic sign that occurs when the dissection compromises a subclavian artery
• Shortness of breath if the dissection causes aortic valve regurgitation or haemothorax
• Loss of consciousness or fainting when blood supply to the brain is compromised
• Stroke symptoms sudden weakness, facial drooping, speech difficulty, if the carotid arteries are involved
• Leg weakness, numbness, or loss of pulse if the dissection extends into the abdominal aorta and iliac arteries
• Sudden inability to urinate, severe abdominal pain when renal or mesenteric arteries are affected
• A sense of impending doom reported frequently by patients; not a vague symptom but a recognised clinical indicator of severe cardiovascular events

What aortic dissection does not typically feel like and this distinction matters is a gradual, dull ache. This is not a pain that builds over hours. When it arrives, it announces itself fully and immediately.

How Is Aortic Dissection Diagnosed?

Speed and accuracy are equally important in diagnosing aortic dissection. The clinical picture and imaging must align fast enough to guide a treatment decision surgical or medical within the first hour of presentation whenever possible.

Clinical assessment: The history particularly the sudden, severe, tearing quality of the pain and the presence of risk factors guides immediate suspicion. A blood pressure differential between arms, a new aortic regurgitation murmur, or neurological signs all heighten clinical concern.

ECG: An electrocardiogram is done immediately primarily to distinguish aortic dissection from acute myocardial infarction (heart attack), since both can present with severe chest pain. 

The critical difference: most aortic dissections do not show the typical ST-elevation of a heart attack. Treating a dissection with thrombolytics (clot-busting drugs given for heart attacks) can be catastrophic.

Chest X-ray: May show a widened mediastinum (the space in the centre of the chest), a classic though not universally present finding. A normal chest X-ray does not rule out dissection.

CT Angiography (CTA) of the aorta: This is the investigation of choice in most emergency settings. A contrast-enhanced CT scan of the entire aorta from the chest to the pelvis can visualise the intimal flap, the true and false lumens, the extent of the dissection, and involvement of branch vessels. It is fast, highly accurate, and widely available. At Felix Hospital, CT angiography is available around the clock.

MRI of the aorta: Offers the best anatomical detail and no radiation exposure, but takes longer than CT making it less practical in acute settings. More useful for follow-up imaging.

Transoesophageal Echocardiography (TOE/TEE): An ultrasound probe passed into the oesophagus gives excellent views of the ascending aorta and aortic valve. Particularly useful in haemodynamically unstable patients who cannot be moved to the CT scanner, or when CT findings are equivocal.

D-dimer blood test: A normal D-dimer level has a high negative predictive value and can help rule out dissection in low-to-intermediate probability cases though it cannot confirm the diagnosis.

Emergency Treatment and Management of Aortic Dissection

Aortic dissection is a race against time. Treatment begins the moment the diagnosis is suspected not after it is confirmed.

Immediate Medical Stabilisation (for all types)

Regardless of whether surgery is planned, the first priority is to reduce the heart rate and blood pressure as rapidly as possible. This reduces the force of each heartbeat against the torn wall and slows the propagation of the dissection.

• IV beta-blockers (typically labetalol or esmolol) are the cornerstone of initial medical management they simultaneously reduce heart rate and blood pressure
• Target heart rate: below 60 beats per minute
• Target systolic blood pressure: 100 to 120 mmHg
• IV vasodilators (sodium nitroprusside) may be added if blood pressure remains elevated despite beta-blockade but never given alone (they can reflexively increase heart rate)
• Adequate IV access, oxygen, continuous cardiac monitoring, and preparation for emergency surgery are initiated simultaneously
• Pain control morphine or other opiates reduce pain and the sympathetic response that drives blood pressure up

Type A Dissection Emergency Surgery

Type A aortic dissection requires emergency open-heart surgery in virtually all cases. This is not a decision that waits for the morning, for a specialist to arrive, or for the patient's condition to stabilise. Surgery involves:

• Replacement of the ascending aorta with a synthetic graft
• Repair or replacement of the aortic valve if it has been damaged by the dissection
• Coronary artery reimplantation if the coronary ostia are involved
• Cardiopulmonary bypass is used throughout the procedure

Surgical mortality for Type A dissection has improved significantly with advances in technique and anaesthesia, but it remains a high-risk operation reflecting the severity of the underlying event.

Type B Dissection Medical Management First

Uncomplicated Type B dissections where there is no evidence of organ ischaemia, rupture, or rapid aortic expansion are initially managed medically with strict blood pressure and heart rate control. Patients are admitted to the intensive care unit and monitored closely.

Complicated Type B dissections involving malperfusion of organs, threatened rupture, uncontrolled pain, or haemodynamic instability require intervention:

• TEVAR (Thoracic Endovascular Aortic Repair): A minimally invasive procedure where a stent-graft is deployed inside the aorta through a small groin incision, sealing the tear in the intima and redirecting blood into the true lumen. TEVAR has largely replaced open surgery for Type B dissections requiring intervention.
• Open surgical repair remains an option when endovascular repair is anatomically not feasible.

Medications and Other Medical Options

Beyond the acute emergency, medications play a critical role in long-term management both for patients who undergo surgery and for those managed non-operatively.

Beta-blockers remain the cornerstone of long-term medical therapy. They reduce aortic wall stress with every heartbeat and have been shown to slow aortic dilation over time. Patients with Marfan syndrome are often started on beta-blockers proactively even before any dissection event occurs.

Angiotensin receptor blockers (ARBs) particularly losartan have shown benefit in Marfan syndrome patients, reducing the rate of aortic root dilation. ARBs are increasingly used alongside or instead of beta-blockers in genetically mediated aortic conditions.

Calcium channel blockers used when beta-blockers are not tolerated help control blood pressure and heart rate.

ACE inhibitors may be used for blood pressure control in Type B patients, particularly those with hypertension as the primary risk factor.

Statins while primarily used for cholesterol, statins have anti-inflammatory effects on the arterial wall and are frequently part of the long-term management plan in patients with aortic disease.

Strict blood pressure targets are non-negotiable for life. Every patient who has experienced an aortic dissection regardless of whether they had surgery must maintain blood pressure consistently below 130/80 mmHg, with many guidelines recommending even lower targets. Home blood pressure monitoring, regular follow-up, and medication compliance are not optional extras. They are core to survival.

Lifelong imaging surveillance typically CT or MRI of the aorta at regular intervals is required to monitor for aneurysm formation, disease progression, or late complications. The frequency of imaging is determined by the treating cardiovascular team.

Lifestyle and Prevention Tips

Prevention is always preferable to emergency and in aortic dissection, the steps that reduce risk are the same steps that improve overall cardiovascular health.

Control blood pressure rigorously and consistently. This is the single most important thing a person can do. Not occasionally, not when they remember, but every day. Take prescribed medications without gaps. Monitor blood pressure at home regularly. Know your numbers. If your blood pressure runs high even "borderline" high treat it seriously.

Do not smoke. Smoking damages the structural integrity of arterial walls throughout the body, including the aorta. It accelerates atherosclerosis and is an independent risk factor for aortic disease. Quitting smoking regardless of how long or how much reduces cardiovascular risk measurably within months.

Manage weight and diet. Excess weight elevates blood pressure. A diet high in sodium drives blood pressure up. A heart-healthy diet low in processed foods, high in vegetables, fruits, whole grains, and lean proteins is protective. Reducing sodium intake to below 2 grams per day is specifically recommended for people with hypertension.

Exercise wisely. Regular moderate aerobic exercise (walking, swimming, cycling) is beneficial for blood pressure control and cardiovascular health. However, heavy isometric exercise particularly heavy weightlifting and competitive powerlifting generates acute blood pressure spikes of extreme magnitude (systolic pressures exceeding 300 mmHg have been recorded during maximal lifts). For people with known aortic disease or connective tissue disorders, this type of exercise carries real risk and should be discussed with a cardiologist before continuing.

Know your family history. If a first-degree relative parent, sibling, child has had an aortic aneurysm or dissection, your personal risk is meaningfully elevated. A proactive echocardiogram or aortic imaging study to assess your baseline aortic dimensions is a sensible step. This is particularly important for people with Marfan syndrome or other connective tissue disorders, where surveillance imaging is standard practice.

Attend regular cardiovascular check-ups. Blood pressure, cholesterol, blood sugar these do not produce symptoms when they are quietly damaging your blood vessels. A routine annual cardiovascular review catches the conditions that, left untreated, eventually produce events like aortic dissection.

If you are on medication take it. The number of cardiovascular events that occur in patients who were prescribed medication but stopped taking it is, from a clinical standpoint, heartbreaking. Antihypertensive medications are not a course of treatment with an end date. For most people, they are lifelong protection.

When to Go to the Emergency Department Immediately

If you or someone near you develops any of the following, call an ambulance or get to the nearest emergency department immediately. Do not drive yourself. Do not wait to see if it passes.

• Sudden, severe chest or back pain especially if it feels like tearing or ripping
• Sudden severe pain anywhere in the trunk that begins at maximum intensity
• Chest pain accompanied by unequal blood pressure in both arms
• Sudden collapse or loss of consciousness
• Sudden stroke symptoms (face drooping, arm weakness, speech difficulty) in combination with chest or back pain
• Abdominal pain with absence of a pulse in one leg

Time is tissue. In aortic dissection, the window for surgical survival narrows by the minute.

Cardiology Care at Felix Hospital, Noida

Felix Hospital, is among the best cardiology hospitals in Noida equipped with a full-service cardiac centre capable of managing complex cardiovascular emergencies including aortic disease.

Our cardiovascular team offers:

• 24/7 cardiac emergency services including emergency echocardiography and CT angiography
• Interventional cardiology for coronary and vascular interventions
• Cardiovascular surgery for open cardiac and aortic procedures
• Endovascular services including TEVAR for aortic conditions
• ICU-level monitoring for haemodynamically unstable patients
• Outpatient cardiology consultations for hypertension management, aortic surveillance, risk factor control, and genetic cardiovascular counselling

If you have a history of high blood pressure, a known connective tissue disorder, a family history of aortic disease, or a previously identified aortic aneurysm speak to our cardiology team before an emergency forces the conversation.

Call Felix Hospital: +91 9667064100 

A consultation today is considerably easier than an emergency tomorrow.