Invited commentary.
Wolfe
L Timothy
LT
Pediatric Cardiology, Penn State Hershey Children's Hospital, The Milton S. Hershey Medical Center, Box 850, 500 University Dr, Hershey, PA 17033-0850, USA. lwolfe1@hmc.psu.edu
Myers
John L
JL
D006348:Cardiac Surgical Procedures; D017548:Echocardiography, Transesophageal / Q000295:instrumentation*; D004867:Equipment Design; D006801:Humans; D007223:Infant; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D008904:Miniaturization; D011446:Prospective Studies