• Paolo Rusconi, James D Wilkinson, Lynn A Sleeper, Minmin Lu, Gerald F Cox, Jeffrey A Towbin, Steven D Colan, Steven A Webber, Charles E Canter, Stephanie M Ware, Daphne T Hsu, Wendy K Chung, John L Jefferies, Christina Cordero, Steven E Lipshultz, and Pediatric Cardiomyopathy Registry Investigators.
• From the Department of Pediatrics, Miller School of Medicine, University of Miami, FL (P.R., S.E.L.); Department of Pediatrics, Wayne State University School of Medicine, Children's Hospital of Michigan, Detroit (J.D.W., S.E.L.); Sanofi Genzyme Corporation, Boston, MA (G.F.C.); The Heart Institute, Le Bonheur Children's Hospital, Memphis, TN (J.A.T.); The Heart Institute, Cincinnati Children's Hospital Medical Center, OH (J.L.J.); Department of Cardiology, Boston Children's Hospital, MA (L.A.S., M.L., S.D.C.); Department of Pediatrics, Vanderbilt University School of Medicine, Monroe Carell Jr. Children's Hospital at Vanderbilt, Nashville, TN (S.A.W.); Department of Pediatrics, Washington University School of Medicine, St. Louis, MO (C.E.C.); Indiana University School of Medicine, Indianapolis (S.M.W.); Department of Pediatrics, Albert Einstein College of Medicine, The Children's Hospital at Montefiore, Bronx, NY (D.T.H.); Department of Pediatrics, Columbia University Medical Center, New York, NY (W.K.C.); and University of North Carolina at Chapel Hill (C.C.).
• Circ Heart Fail. 2017 Feb 1; 10 (2).

BackgroundResearch comparing the survival of children with familial dilated cardiomyopathy (FDCM) to that of children with idiopathic dilated cardiomyopathy (IDCM) has produced conflicting results.Methods And ResultsWe analyzed data from children with FDCM or IDCM using the National Heart, Lung, and Blood Institute-funded Pediatric Cardiomyopathy Registry. Compared to children with IDCM (n=647), children with FDCM (n=223) were older (mean 6.2 versus 4.5 years, P<0.001), less often had heart failure (64% versus 78%, P<0.001), had less-depressed mean left ventricular fractional shortening z scores (-7.85±3.98 versus -9.06±3.89, P<0.001) and lower end-diastolic dimension z scores (4.12±2.61 versus 4.91±2.57, P<0.001) at diagnosis. The cumulative incidence of death was lower for patients with FDCM compared with IDCM (P=0.04; hazard ratio 0.64, P=0.06), but no difference in risk of transplant or the combined death or transplant outcome. There was no difference in the proportion of children with echocardiographic normalization at 3 years of follow-up (FDCM, 30% versus IDCM, 26%; P=0.33). Multivariable analysis showed no difference in outcomes between FDCM and IDCM but for both groups older age, congestive heart failure, and increased left ventricular end-systolic dimension zscore at diagnosis were independently associated with an increased risk of death or heart transplantation (all Ps<0.001).ConclusionsThere was no survival difference between FDCM and IDCM after adjustment for other factors. Older age, congestive heart failure, and greater left ventricular dilation at diagnosis were independently associated with increased risk of the combined end point of death or transplantation.Clinical Trial RegistrationURL: https://clinicaltrials.gov. Unique identifier: NCT00005391.© 2017 American Heart Association, Inc.

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