The purpose of the present study was to noninvasively compare ascending aortic blood
flow and cross-sectional area (CSA) variations versus time in Mustard or Senning repaired
(MSR) patients against those of healthy volunteers at rest. Velocity-encoded MR imaging
was performed in 10 male patients (age range 18–24 years, median age 20.5 years) late
after a Mustard or Senning correction, and in 10 male healthy volunteers (age range
21–25 years, median age 22.5 years), at the upper part of the ascending aorta. Both
aortic CSA and blood-flow variations were recorded over a complete cardiac cycle,
with a 30-ms time of resolution. The body-surface area (BSA), the mean CSA over the
systolic phase, and the BSA-normalized systemic ventricle power and work were significantly
lower in the patient series compared with those of the volunteer series. The BSA-normalized
right ventricle (RV) power and work of MSR patients were equal to 87 and 83% on average
of those of the left ventricle (LV) of healthy volunteers. We conclude that, at rest,
the mechanical performance of the systemic RV in MSR patients is significantly lower
than that of the LV in healthy volunteers. Furthermore, the significantly lower aortic
CSA found in MSR patients than in healthy volunteers may reveal an increase in the
vasomotor tone.
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Publication history
Published online: October 05, 2004
Identification
Copyright
© 2004 Published by Elsevier Inc.
