Factors that preclude the use of a single-stage arterial switch reconstruction of dextrotransposition of the great vessels include:

A. Age older than 6 weeks with a left ventricular pressure of less than 50% of systemic pressure.
B. Dynamic left ventricular outflow tract obstruction.
C. Intramural coronary artery anatomy.
D. Valvar pulmonic stenosis.
E. Subpulmonary VSD.

Ans: A,D