Thoracic Aneurysms
What Is A Thoracic Aneurysm?
A thoracic aortic aneurysm is a potentially life-threatening condition that occurs when a weakened area of the aorta, the main artery carrying blood from the heart to the rest of the body, bulges or expands in the chest cavity. According to the Centers for Disease Control and Prevention (CDC), aortic aneurysms were the primary cause of 9,904 deaths in 2019. Thoracic aortic aneurysms often grow slowly and without symptoms, making them difficult to detect; however, as they expand, they can cause chest or back pain, shortness of breath, hoarseness, coughing or difficulty swallowing.
Thoracic aortic aneurysms are typically caused by high blood pressure, atherosclerosis (hardening of the arteries) or connective tissue disorders such as Marfan syndrome or Ehlers-Danlos syndrome. Treatment options depend on the aneurysm's size and growth rate, and they may include medications to lower blood pressure and reduce the risk of rupture or surgery to repair or replace the weakened section of the aorta. Regular check-ups and imaging tests, such as echocardiograms, CT scans or MRIs, are essential for monitoring the growth of a thoracic aortic aneurysm and determining the most appropriate course of treatment.
At what size does a thoracic aneurysm require surgery?
The size at which a TAA requires surgery can vary depending on several factors. In general, surgery is usually performed when the diameter of the aorta reaches 5.5 cm. However, for patients with connective tissue disorders, the recommended threshold for repair is an aneurysm diameter exceeding 50 mm.
It’s also important to note that symptomatic aneurysms and aneurysms associated with a rapid growth rate of more than 1 cm per year should also be repaired due to an increased risk for rupture.
How Is A Thoracic Aneurysm Treated?
Treatment for a thoracic aortic aneurysm (TAA) typically involves a combination of lifestyle modifications, medication and possibly surgery. The specific treatment plan depends on various factors, including the size and growth rate of the aneurysm.
- Lifestyle modifications: This includes managing risk factors such as high blood pressure and atherosclerosis.
- Medication: Medications may lower blood pressure and reduce the risk of rupture.
- Surgery: Surgical intervention may be necessary if the aneurysm is large or growing rapidly. There are two main types of surgery for TAA: traditional open-chest surgery and a less invasive procedure called endovascular repair.
- Open Thoracic Aneurysm Repair: This traditional surgical method requires a long incision along the side of your chest. The surgeon removes the damaged portion of the aorta and replaces it with a synthetic material known as a graft. This graft is stronger than the weakened aorta, allowing blood to pass through without causing a bulge.
- Thoracic Endovascular Aortic Repair (TEVAR): TEVAR is a minimally invasive procedure. In this procedure, the surgeon reaches the aorta by placing a small, hollow tube, called a catheter, through a blood vessel in your groin. They use the catheter to place a small mesh device, known as a stent, that repairs the diseased portion of the aorta and restores proper blood flow.
Symptoms and Risk Factors of Thoracic Aneurysms
Symptoms of thoracic aortic aneurysms may go unnoticed until the aneurysm grows large enough to cause complications. Common symptoms of a thoracic aneurysm may include:
- Chest pain or discomfort
- Back pain
- Shortness of breath
- Hoarseness
- Coughing
- Difficulty swallowing
Certain risk factors can increase the likelihood of developing a thoracic aortic aneurysm:
- Age: More common in people over 65
- Smoking: Increases risk of aneurysm formation and growth
- High blood pressure: Puts additional stress on the aortic wall
- Genetic disorders: Marfan syndrome, Ehlers-Danlos syndrome and others
- Family history: Having a close relative with an aortic aneurysm
- Atherosclerosis: Plaque buildup in the arteries
Recognizing the symptoms and understanding the risk factors associated with thoracic aortic aneurysms can help individuals seek timely medical attention and receive appropriate treatment to prevent life-threatening complications.
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