Valve-Sparing Root Replacement Versus Composite Valve Grafting in Aortic Root Dilation: A Meta-Analysis

Area of Science:

• Cardiovascular Surgery
• Thoracic Surgery
• Medical Devices

Background:

• Aortic valve-sparing operations may reduce stroke and bleeding complications but potentially increase late reoperation risk compared to composite valve grafts.
• This meta-analysis compares aortic valve-sparing (reimplantation and remodelling) with composite valve-grafting (bioprosthetic and mechanical) procedures.

Purpose of the Study:

• To compare early and long-term outcomes of aortic valve-sparing procedures versus composite valve grafting.
• To evaluate mortality, reoperation, bleeding, myocardial infarction, and thromboembolic/stroke complications.

Main Methods:

• Meta-analysis of observational studies comparing aortic valve-sparing and composite valve-grafting procedures.
• Included 3794 patients for composite valve grafting and 2424 for aortic valve-sparing.
• Excluded studies focused solely on dissection or pediatric populations.

Main Results:

• No significant difference in early mortality, bleeding, myocardial infarction, or thromboembolic complications between the two groups.
• Aortic valve-sparing was associated with significantly lower late mortality (IRR 0.68; 95% CI 0.54-0.87).
• Lower risks of late thromboembolism/stroke (IRR 0.36; 95% CI 0.22-0.60) and bleeding (IRR 0.21; 95% CI 0.11-0.42) were observed with valve-sparing. Late reintervention rates were similar.

Conclusions:

• Aortic valve-sparing surgery is safe and linked to decreased late mortality, thromboembolism/stroke, and bleeding compared to composite valve grafting.
• The long-term durability of aortic valve-sparing procedures is equivalent to composite valve grafts.
• Consider aortic valve-sparing in patients with favorable aortic valve morphology.