Increased Myocardial Performance Index Correlates With Biopsy-Proven Rejection in Pediatric Heart Transplant Recipients

In this series, increased LVMPI correlated with biopsy-proven rejection, and frequent serial assessments using this technique may provide a relatively sensitive non-invasive means of rejection surveillance after pediatric cardiac transplantation. False positive results may be encountered, likely due to alterations in diastolic function that have been previously observed in transplant recipients.