How do you classify an aortic dissection?

In the Stanford classification of aortic dissection:

1. Type A involves the ascending aorta and may progress to involve the arch and thoracoabdominal aorta.
2. Type B involves the descending thoracic or thoracoabdominal aorta distal to the left subclavian artery without involvement of ascending aorta.

Is aortic arch dissection type A or B?

Aortic dissections that occur in the ascending part of the aorta are called type A; those in the descending aorta are type B. These types of dissections are further classified by two categories: acute and chronic.

How many types of aortic dissection are there?

Aortic dissections are divided into two groups, depending on which part of the aorta is affected: Type A. This more common and dangerous type involves a tear in the part of the aorta where it exits the heart. The tear may also occur in the upper aorta (ascending aorta), which may extend into the abdomen.

What is a type 3 aortic dissection?

A “complicated” Type III aortic dissection is defined as one that causes malperfusion of the viscera, kidneys or lower extremities, or as evidenced by rupture and occurs in 25–40% of cases.

Which classification of aortic dissections is classified as acute or chronic based upon the duration of symptoms at the time of presentation?

One such classification is based on chronicity and labels aortic dissections as hyperacute (<24 hours duration), acute (2–7 days), subacute (8–30 days), and chronic (>30 days). The systems commonly in use are based on either the anatomy of the dissection or the duration of onset of symptoms before the presentation.

Is aortic dissection the same as aortic aneurysm?

An aortic aneurysm occurs when a weak spot in the wall of the aorta begins to bulge, as shown in the image on the left. An aneurysm can occur anywhere in the aorta. Having an aortic aneurysm increases the risk of a tear in the aortic lining (aortic dissection), as shown in the image on the right.

What is aortic dissection type A?

When do you use type B aortic dissection?

INTERVENTION Intervention for acute type B aortic dissection is generally reserved for those who progress from uncomplicated to complicated disease (malperfusion, uncontrollable pain, hypertension, expansion, rupture, or impending rupture).

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.

What is an aortic dissection type B?

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.