Oral Sildenafil and Intravenous Milrinone on Postoperative Pulmonary Hypertension
Status:
Completed
Trial end date:
2015-10-01
Target enrollment:
Participant gender:
Summary
Pulmonary hypertension (PH) is a consequence of an increase in pulmonary vascular resistance
(PVR), pulmonary blood flow, pulmonary venous pressure, or a combination of these elements.
Pulmonary arterial hypertension is a frequent complication of congenital heart disease,
particularly in patients with systemic-to-pulmonary shunts. Persistent exposure o f the
pulmonary vasculature to increased blood flow and pressure may result in vascular remodeling
and dysfunction. This leads to increased pulmonary vascular resistance and, ultimately, to
reversal of the shunt and development of Eisenmenger's syndrome. It may be more appropriate
to define pulmonary hypertension according to the ratio of MPAP to mean systemic arterial
pressure (MPAP/MAP) because children may have a low mean systemic blood pressure. MPAP/MAP
ratio of < 0.25 is normal, a ratio of 0.33-0.5 indicates moderate pulmonary hypertension, and
a ratio of > 0.5 is indicative of severe pulmonary hypertension