Compliance of the Valsalva Graft's Pseudosinuses at Midterm Follow-Up With Cardiovascular Magnetic Resonance

Abstract

In previous studies, the Valsalva graft's compliance at the level of the Dacron pseudosinuses was found similar to that of normal sinuses shortly (2±1 months) after the operation. We sought to investigate with cardiac magnetic resonance the compliance of the Valsalva graft pseudosinuses at midterm follow-up. Seven patients (group A) and 7 age-matched controls (group B) were studied with steady-state free precession and phase-contrast cardiac magnetic resonance for aortic root and ascending aorta evaluation. Blood pressure was measured during phase-contrast acquisition to derive the following mechanical properties of the vascular prosthesis: pulsatility, compliance, distensibility, and elastic modulus. Mean postoperative follow-up was 55±9.84 months. Mean age was 69.2±4.98 years in group A, and 65.7±7.16 years in group B. All the studied variables were coherent in showing a significant difference between the two groups, and between aortic root (skirt portion of the graft) and ascending aorta (tubular part of the graft) in group A. The presence of periaortic fibrosis did not show any correlation with the ascending aorta's mechanical properties. At midterm follow-up, the pseudosinuses compliance of the Valsalva graft is still appreciable and significantly greater than the tubular portion.