What is a Type A dissection?

What is a Type A dissection?

Type A dissection occurs when the tear develops in the ascending part of the aorta just as it branches off the heart, while Type B dissection involves the lower aorta. While Type A dissection is the more dangerous form, chances of survival are significantly improved with early detection and management.

What is the difference between Type A and Type B dissection?

Aortic dissections are classified into two types: type B dissection involves a tear in the descending part of the aorta and may extend into the abdomen, whereas type A dissection develops in the ascending part of the aorta just as it branches off the heart.

What is a type A dissection repair?

A Type A aortic dissection is a medical emergency and requires surgery to repair the tear before further damage occurs. The most typical surgery for aortic dissection is valve sparing root replacement, or the David procedure.

Why is type A dissection an emergency?

An aortic dissection is a serious condition in which a tear occurs in the inner layer of the body’s main artery (aorta). Blood rushes through the tear, causing the inner and middle layers of the aorta to split (dissect). If the blood goes through the outside aortic wall, aortic dissection is often deadly.

What is a Type A and Type B aortic dissection?

In the Stanford classification of aortic dissection: Type A involves the ascending aorta and may progress to involve the arch and thoracoabdominal aorta. Type B involves the descending thoracic or thoracoabdominal aorta distal to the left subclavian artery without involvement of ascending aorta.

Where is a type A aortic dissection?

Type A aortic dissection occurs in the ascending aorta, which is the curved part of the aorta that extends upward from the heart. This tear may extend along the upper part of the aorta and down toward the abdomen. Type A is the most common type of aortic dissection and is more likely to be acute than chronic.

What is Type A and Type B aortic dissection?

Can you have a Type A and Type B dissection?

Type A which is the more common and dangerous of the two and involves a tear in the part of the aorta where it exits the heart or a tear in the upper, or ascending aorta, which may extend into the abdomen. Type B which involves a tear in the lower, or descending, aorta only, which may also extend into the abdomen.

Is type A or B dissection worse?

Type A is the most common type of aortic dissection and is more likely to be acute than chronic. This makes it more dangerous than type B dissections because it is more likely to cause the aorta to rupture, leading to a potentially fatal heart condition.

Why is type A aortic dissection worse?

Type A Aortic Dissection Type A is the most common type of aortic dissection and is more likely to be acute than chronic. This makes it more dangerous than type B dissections because it is more likely to cause the aorta to rupture, leading to a potentially fatal heart condition.

Is Type A or Type B aortic dissection worse?

What is type B dissection?

Type B aortic dissection – Aortic dissection is defined as a tear in the innermost layer of the aortic wall (ie, intima), which results in high-pressure blood flow between the layers of the aorta, creating a true and false lumen.

How common is type A aortic dissection?

Aortic dissection is rare, affecting about 30 in 1 million people each year. But knowing the symptoms and risk factors — a genetic predisposition in particular — can be lifesaving. There are two types of aortic dissection.

What is a Type B dissection of aorta?

INTRODUCTION. Chronic type B aortic dissection is defined as one in which the tear originates in the descending thoracic aorta and which has been present for more than 90 days.

Why is type A dissection worse?

Does ECG show aortic dissection?

An electrocardiogram (ECG) may show complications of dissection, including a heart attack. The chest x-ray may show an enlarged aorta. However, both the ECG and chest x-ray may be completely normal in aortic dissection and cannot diagnose or exclude aortic dissection.

Why is there a BP difference in aortic dissection?

Most aortic dissections occur because high blood pressure causes the artery’s wall to deteriorate. People have sudden, excruciating pain, most commonly across the chest but also in the back between the shoulder blades.

How long can you live with an aortic dissection?

Short-term and long-term survival rates after acute type A aortic dissection (TA-AAD) are unknown. Previous studies have reported survival rates between 52% and 94% at 1 year and between 45% and 88% at 5 years.

Which arm BP is lower in aortic dissection?

The group with inter-arm BP difference of ≥14.5 mmHg had a lower systolic blood pressure on arrival at the ED, possibly because of the cardiac output being influenced after dissection.