Aortic dissection reconsidered: type, entry site, malperfusion classification adding clarity and enabling outcome...

Area of Science:

• Cardiovascular Surgery
• Vascular Medicine
• Medical Imaging

Background:

• Aortic dissection is a complex cardiovascular emergency with evolving imaging and treatment strategies.
• Existing classification systems, like the Stanford classification, may lack the granularity needed for modern clinical practice.
• A more differentiated yet pragmatic classification is required to guide management and predict outcomes.

Purpose of the Study:

• To introduce a novel, practical classification system for aortic dissection named TEM (Type, Entry tear location, Malperfusion).
• To enhance the understanding of aortic dissection complexity by incorporating key anatomical and physiological factors.
• To provide a tool for improved clinical decision-making and outcome prediction in patients with aortic dissection.

Main Methods:

• The TEM classification extends the Stanford system by including non-A non-B dissections, primary entry tear location (E0-E3), and malperfusion status (M0-M3).
• Malperfusion is further categorized as clinical (+) or radiological (-).
• The system was retrospectively applied to 357 patients diagnosed with aortic dissection.

Main Results:

• The study population comprised 59% Type A, 31% Type B, and 10% non-A non-B dissections.
• In-hospital mortality rates varied significantly across subtypes (e.g., 16% for A, 5% for B, 8% for non-A non-B).
• Mortality was notably higher in Type A dissections with specific entry tear locations (e.g., 40% for A E2) and postoperative stroke rates were higher in Type A dissections (14%).

Conclusions:

• The TEM classification system offers enhanced clarity regarding the extent and mechanism of aortic dissection.
• It serves as a valuable aid in surgical decision-making and helps anticipate patient prognosis.
• This practical classification system has the potential to refine the management of aortic dissection.