Valve-sparing aortic root replacement using a straight tube graft (David I procedure)

Area of Science:

• Cardiovascular Surgery
• Thoracic Surgery
• Aortic Surgery

Background:

• Aortic root aneurysm and dissection are serious conditions requiring surgical intervention.
• Valve-sparing aortic root replacement aims to preserve native valve function.
• The David-I procedure utilizes a straight tube graft for aortic root reconstruction.

Purpose of the Study:

• To evaluate the 25-year experience with the David-I valve-sparing aortic root replacement.
• To assess the perioperative outcomes, long-term survival, and reoperation rates.
• To identify risk factors for aortic valve-related reoperation.

Main Methods:

• A retrospective analysis of 677 patients undergoing the David-I procedure between 1993 and 2019.
• Data collected included patient demographics, comorbidities, surgical details, and outcomes.
• Multivariate Cox regression analysis was used to identify independent risk factors.

Main Results:

• Overall in-hospital mortality was 4.0%, with a 3.8% perioperative stroke rate.
• Excellent short- and long-term results were observed, with 20-year survival at 50% and freedom from reoperation at 80%.
• Independent risk factors for reoperation included younger age, less experienced surgeons, and residual postoperative aortic insufficiency.

Conclusions:

• The David-I procedure is associated with very low perioperative morbidity and mortality.
• Excellent short- and long-term outcomes are achievable with this valve-sparing technique.
• The procedure is reproducible and the straight tube graft does not increase leaflet erosion.