- Academic Editor
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Background: Pulse pressure variation (PPV) is based on heart-lung
interaction and its association with the imbalance between pulmonary and systemic
blood flow (Qp:Qs) has been understudied. We hypothesized that (1) baseline PPV
(after induction of anesthesia) is different in a mixed congenital heart disease
population with different Qp:Qs, (2) baseline PPV is different between a pooled
group with high Qp:Qs and one with low Qp:Qs, and (3) a systemic-pulmonary shunt
procedure results in reduced PPV compared to baseline. Methods: We
retrospectively reviewed the medical charts of children who presented to the
operating room for cardiac surgery between 2010 and 2018. General patient
characteristics, PPV, and other hemodynamic parameters following the induction of
general anesthesia were retrieved. Patients were grouped according to the type of
congenital heart disease, and whether the Qp:Qs ratio was higher or lower than 1.
We also identified patients who received a systemic-pulmonary shunt in order to
evaluate changes in PPV. Results: A total of 1253 patients were included
in the study. Baseline PPV differed significantly according to the type of
congenital heart disease, with atrial septal defect showing the lowest PPV (9.5