Valve-Sparing Versus Composite Graft Aortic Root Replacement in Acute Type A Aortic Dissection with Standardized...

Area of Science:

• Cardiovascular Surgery
• Thoracic Surgery
• Aortic Surgery

Background:

• Acute type A aortic dissection (ATAAD) is a life-threatening condition requiring prompt surgical intervention.
• Surgical repair of ATAAD often involves aortic root replacement and hemiarch replacement.
• Two primary techniques for aortic root replacement are the valve-sparing reimplantation (David procedure) and composite graft replacement (Bentall procedure).

Purpose of the Study:

• To compare the short- and long-term outcomes of the David I procedure versus the Bentall procedure for aortic root replacement in patients with ATAAD.
• To evaluate outcomes following standardized hemiarch replacement in conjunction with these aortic root repair techniques.
• To provide insights for surgical decision-making in emergency ATAAD settings.

Main Methods:

• A retrospective analysis of 154 patients undergoing emergency surgical repair for ATAAD between 2001 and 2023.
• Patients were divided into two groups: David procedure (n=59) and Bentall procedure (n=95), both combined with hemiarch replacement.
• 1:1 propensity score matching was employed to minimize confounding variables in this non-randomized study.

Main Results:

• Propensity score matching revealed no significant differences in intra-operative variables or hospital outcomes between the David and Bentall groups.
• In-hospital mortality rates were comparable: 15% for David plus Hemiarch vs. 24% for Bentall plus Hemiarch (p=0.40).
• Long-term survival analyses demonstrated no significant differences between the two surgical approaches.

Conclusions:

• Standardized hemiarch replacement in ATAAD repair yields similar short- and long-term outcomes for both valve-sparing (David) and composite graft (Bentall) aortic root replacement.
• The choice between David and Bentall procedures in ATAAD patients undergoing hemiarch replacement should be based on surgeon expertise and comfort.
• This study offers valuable clinical insights for emergency surgical decision-making in ATAAD management.