Aortic dissection is a life-threatening emergency that requires immediate care. It happens when a tear develops in the inner lining of the aorta, letting blood flow between layers of the vessel wall. Fast recognition and treatment can save lives. At Cape Fear Valley, emergency, cardiac, and vascular specialists work together to diagnose and treat aortic dissection quickly and safely.
Overview of Aortic Dissection
The aorta is the body’s main artery, carrying blood from the heart to all organs. In an aortic dissection, a tear in the inner lining (intima) allows blood to enter the middle layer (media), creating a false channel that can block blood flow, weaken the aorta, or cause rupture. This is sometimes referred to as aortic artery dissection in clinical notes.
Two anatomic types guide treatment:
- Stanford Type A: Involves the ascending aorta (the portion leaving the heart) and is a surgical emergency.
- Stanford Type B: Involves only the descending aorta and may be managed with medication and/or endovascular repair depending on complications.
Dissections are also described by timing: acute (within 14 days) and chronic (more than 14 days). Acute dissections carry the highest immediate risk. Aortic dissection can be confused in wording as “a aortic dissection,” but the condition is the same urgent entity regardless of phrasing.
Aortic dissection is uncommon, affecting an estimated 2 to 4 people per 100,000 each year. It occurs more often in adults over 60 and in men more than women, but younger individuals with underlying conditions can be affected. Aortic dissection causes often relate to damage or weakness of the aortic wall. Risk factors include uncontrolled high blood pressure, atherosclerosis, connective tissue disorders (such as Marfan or Loeys-Dietz syndromes), bicuspid aortic valve, prior cardiac surgery, family history of aortic disease, stimulant use (for example, cocaine), pregnancy or postpartum in rare cases, and significant trauma. Smoking and high cholesterol further damage the aortic wall and increase risk. Understanding these aortic dissection causes helps guide prevention and screening for those at higher risk.
Symptoms and Warning Signs for Aortic Dissection
The hallmark symptom is sudden, severe pain often described as tearing, ripping, or stabbing. Pain typically begins abruptly, reaches maximum intensity within minutes, and may start in the chest and move to the back, between the shoulder blades, abdomen, neck, or jaw. Some people, especially with Type B dissections, may have primarily back or abdominal pain. In any suspected aortic artery dissection, these features are red flags.
Other signs can include fainting, shortness of breath, sweating, or nausea. Differences in blood pressure or pulse between arms, a new heart murmur, hoarseness, or leg pain may occur. If blood flow to the brain or spinal cord is affected, neurological symptoms such as weakness, difficulty speaking, or sudden leg weakness can appear. Reduced blood flow to organs may cause kidney problems, abdominal pain, or limb ischemia.
Seek emergency care immediately for sudden severe chest, back, or abdominal pain, especially if it feels tearing, is accompanied by fainting, shortness of breath, neurological changes, or you have a known aneurysm or connective tissue disorder. Call 911; do not drive yourself. Early treatment for aortic dissection dramatically improves survival.
Diagnosis and Tests for Aortic Dissection
Rapid imaging is essential to confirm the diagnosis and plan treatment for aortic dissection.
| Test | Key Role | Typical Use |
|---|---|---|
| CT angiography (CTA) | Shows the intimal flap, true and false lumens, and branch vessel involvement with speed and high detail. | Most common emergency test. |
| Transesophageal echocardiography (TEE) | Bedside assessment for unstable patients; evaluates aortic regurgitation and pericardial effusion. | Useful when Type A dissection is suspected. |
| MRI angiography | Excellent detail without radiation. | Less available emergently; used for follow-up or stable patients. |
| Chest X-ray | May show a widened mediastinum or pleural effusion. | Cannot rule out dissection. |
Blood tests evaluate organ function and consider other causes of chest pain. Troponin helps assess for heart attack. D-dimer may support the diagnosis in some settings but is not definitive.
Clinicians check vital signs, pulses, and blood pressure in both arms, listen for new murmurs, and look for signs of organ ischemia. Because symptoms can overlap with heart attack, an electrocardiogram and cardiac enzymes are obtained. Features that heighten concern for aortic artery dissection include abrupt tearing pain, pulse deficits, blood pressure differences between arms, neurological symptoms, and signs of aortic regurgitation. Myocardial infarction can coexist with Type A dissection, so careful evaluation is crucial.
Initial management begins immediately while imaging is underway. This includes oxygen, IV access, pain control, and careful lowering of blood pressure and heart rate—often with IV beta-blockers and vasodilators—to reduce stress on the aortic wall in suspected aortic dissection.
Treatment, Recovery, and Prevention for Aortic Dissection
The goals of treatment are to prevent rupture, restore blood flow to organs, and reduce aortic wall stress. The approach depends on dissection type and complications:
- Type A dissection: Urgent open heart surgery is standard, often replacing the ascending aorta and repairing or replacing the aortic valve if needed.
- Type B dissection: Medical therapy alone for uncomplicated cases; endovascular repair (thoracic endovascular aortic repair, TEVAR) is often used if there is organ malperfusion, persistent pain, uncontrolled hypertension, or signs of impending rupture.
Recovery varies with the procedure and overall health. After surgery or TEVAR, patients typically spend time in the ICU for close monitoring, then move to step-down care. Pain management, early mobilization, respiratory therapy, and meticulous blood pressure control are essential. Discharge plans often include beta-blockers and other blood pressure medications, activity guidance, and referral to cardiac rehabilitation when appropriate.