584 - TISSUE-SPECIFIC, BUT NOT STRAIN-SPECIFIC, ACCEPTANCE OF CARDIAC ALLOGRAFTS IN NEONATALLY-TOLERIZED MICE IS MEDIATED BY TRANSFERABLE CD4⁺CD45RB^lowCD25⁺ T CELLS
B Hofmann, K Tao, L Mai, LJ West
Toronto, Ontario

585 - QUALITY OF LIFE OUTCOMES IN THE ADOLESCENT HEART TRANSPLANT POPULATION
SJ Anthony, SM Pollock-BarZiv, AI Dipchand, LJ West
Toronto, Ontario

586 - ELIMINATION OF DONOR-SPECIFIC B CELLS AFTER ABO-INCOMPATIBLE INFANT HEART TRANSPLANTATION: NEONATAL IMMUNE TOLERANCE IN HUMANS
LJ West, X Fan, A Ang, AI Dipchand
Toronto, Ontario

587 - USING STRESS ECHOCARDIOGRAPHY TO ASSESS VENTRICULAR FUNCTION, HEMODYNAMICS AND EXERCISE TOLERANCE IN PEDIATRIC HEART TRANSPLANT RECIPIENTS
DG Human, S Junaid, AM De Souza, MT Potts, GG Sandor, JE Potts
Vancouver, British Columbia

588 - AFTER HOMOGRAFT IMPLANTATION, INFANT NORWOOD PATIENTS BECOME SENSITIZED TO DONOR HLA ANTIGENS BUT NOT TOLERANT TO INCOMPATIBLE DONOR ABH ANTIGENS
LJ West, NE Lobach, LK Hornberger, AI Dipchand, JF Smallhorn, G VanArsdell, SM Pollock-BarZiv, N DenHollander
Toronto, Ontario

589 - HIGH INCIDENCE OF AORTIC DILATATION IN FIRST-DEGREE RELATIVES OF INDIVIDUALS WITH LEFT VENTRICULAR OUTFLOW TRACT OBSTRUCTION (LVOTO)
JL Bigras, NS Dahdah, M Prsa, M Bergeron, J Michaud
Montreal, Quebec