Acute effects of vasoactive medications in patients with parallel circulation awaiting hybrid or Norwood procedure.

Background: Vasoactive medications are frequently used in the preoperative stage to balance the pulmonary and systemic blood flow. However, not much is known about the effects of these agents during this stage.

Aims: The primary objective of this study was to characterize the acute effects of vasoactive medications in children with parallel circulation before either the hybrid or Norwood procedure.