Aortic root anatomy after aortic valve reimplantation

Area of Science:

• Cardiovascular Surgery
• Medical Imaging
• Anatomy

Background:

• Concerns exist regarding the anatomical relationships in aortic root reconstruction to improve outcomes.
• Understanding the precise spatial arrangement of the sinotubular junction, ventricular-aortic junction, and virtual basal ring is crucial for successful aortic root repair.

Purpose of the Study:

• To evaluate the in vivo anatomy of the aortic root following Valsalva graft reimplantation.
• To assess the anatomical relationship between the components of the aortic root after this surgical procedure.

Main Methods:

• Analysis of 10 patients undergoing Valsalva graft reimplantation for tricuspid aortic valves.
• Placement of surgical clips as markers at specific anatomical points.
• Electrocardiogram-gated computed tomography scans of the aortic root.
• 3D modeling and measurement of distances between the virtual basal ring and graft landmarks.

Main Results:

• Mean heights of graft basal landmarks from the virtual basal ring varied, with the right-left commissure at 7.1 ± 5.1 mm and the noncoronary sinus at 1.4 ± 1.6 mm.
• Mean planar distances (thickness) also showed variation, e.g., right-left commissure 5.3 ± 3.1 mm and noncoronary sinus 1.5 ± 1.5 mm.
• Slight asymmetry in graft proximal seating was observed, with the graft positioned higher at the right sinus and left/right commissure.

Conclusions:

• Despite complete root dissection, slight asymmetry in proximal graft seating occurs after Valsalva graft reimplantation.
• The Dacron graft's position relative to the virtual basal ring varies in height and thickness circumferentially.
• The overall annular stabilization is not compromised by these observed anatomical variations.