Coarctation in children. Controlled hypotension using labetalol and halothane

Area of Science:

• Cardiovascular Surgery
• Pediatric Anesthesiology
• Pharmacology

Background:

• Postductal coarctation of the aorta is a congenital heart defect requiring surgical correction.
• Intraoperative hypotension management is critical in pediatric cardiac surgery.
• Labetalol, an alpha and beta-adrenergic blocker, is used for blood pressure control.

Purpose of the Study:

• To evaluate the efficacy and safety of labetalol in inducing hypotension during surgery for postductal coarctation of the aorta in children.
• To assess the impact of labetalol on mean arterial pressure and heart rate.
• To determine the suitability of labetalol for intraoperative use in this pediatric surgical population.

Main Methods:

• Nine children undergoing surgery for postductal coarctation of the aorta were included.
• Hypotension was induced using halothane and labetalol.
• Mean arterial pressure and heart rate were monitored throughout the procedure.

Main Results:

• Labetalol administration resulted in a mean arterial pressure decrease of 30%.
• Halothane concentration (1%) required reduction in six patients during labetalol infusion.
• Heart rate decreased by an average of 8%, with no profound beta-blockade observed.
• Operating conditions were deemed satisfactory.

Conclusions:

• Labetalol effectively induced controlled hypotension in pediatric patients undergoing coarctation of the aorta repair.
• The drug demonstrated a favorable safety profile with acceptable hemodynamic effects.
• Labetalol may be a valuable agent for managing blood pressure during and after such surgeries.