Surgery for acute type a aortic dissection: comparison of techniques

Area of Science:

• Cardiovascular Surgery
• Thoracic Surgery
• Aortic Dissection Research

Background:

• Acute ascending aortic dissection presents significant surgical challenges with considerable early mortality.
• Optimal surgical strategies are continuously investigated to improve patient outcomes.

Purpose of the Study:

• To compare the graft inclusion technique with the open resection technique for acute ascending aortic dissection.
• To determine the optimal surgical strategy for improved patient survival and reduced complications.

Main Methods:

• A consecutive series of 193 patients undergoing emergency surgery for acute ascending aortic dissection between 1985 and 1995.
• Comparison of graft inclusion (n=100) versus open resection (n=93) techniques, including graft replacement details and preoperative risk factors.
• Analysis of early mortality, postoperative complications, long-term survival, and reoperation rates.

Main Results:

• Overall early mortality was 24%, with 31% in the graft inclusion group versus 16% in the open resection group (P=0.0154).
• Survival at 8 years was significantly better with the open technique (P=0.0300).
• Pseudoaneurysm formation occurred only after graft inclusion (3%), and graft inclusion independently predicted higher early and late mortality.

Conclusions:

• The open resection technique is the preferred surgical method for acute ascending aortic dissection, demonstrating superior early and late results.
• The graft inclusion technique may be considered in specific high-bleeding risk scenarios, with attention to perigraft-space decompression.
• While late outcomes are generally satisfactory, early mortality remains a concern, highlighting the importance of surgical technique selection.