It is with great pleasure that I introduce this special issue ofPediatric Physical Therapydevoted to pediatric cardiopulmonary physical therapy. Joan Darbee, the guest editor of this issue, has pulled together an excellent group of articles covering an array of topics in this area. I'm sure this issue will be used as a resource by both cardiopulmonary therapists and pediatric therapists. Each article is an in-depth presentation of clinically significant information on cardiopulmonary conditions seen in the pediatric population. It will be apparent from your readings that the authors have given enough basic information to allow thoughtful questioning and discussion of the advanced information presented. All levels of therapists will find these articles useful. Again I thank each author for her contribution to this issue and Joan Darbee for her leadership in bringing this group together.