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Does TCPC power loss really affect exercise capacity?
  1. Reza H Khiabani1,
  2. Kevin K Whitehead2,
  3. David Han1,
  4. Maria Restrepo1,
  5. Elaine Tang1,
  6. James Bethel3,
  7. Stephen M Paridon2,
  8. Mark A Fogel2,
  9. Ajit P Yoganathan1
  1. 1 Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology & Emory University, Atlanta, Georgia, USA
  2. 2 Division of Cardiology and Department of Radiology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
  3. 3 Westat, Rockville, Maryland, USA
  1. Correspondence to Dr Ajit P Yoganathan, 387 Technology Circle, Suite 232, Atlanta, GA 30313, USA; ajit.yoganathan{at}

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The Authors’ reply

We read with interest the response1 to our study.2 The authors speculate: “What if indexed power loss (iPL) is dependent on body surface area (BSA)?” We wish to make the following points in response:

  1. The data extracted from our paper2 that includes 30 patients shows no statistically significant correlation (p=0.167) between iPL and BSA (see online supplementary figure). This clarifies the speculation and supports our conclusion: ‘iPL correlates with exercise capacity’. We believe this is not surprising given …

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  • Contributors All authors were fully involved in the study design, data analysis and interpretation of results, preparation of the manuscript, and final approval of the manuscript.

  • Competing interests None.

  • Patient consent Obtained.

  • Ethics approval All the study protocols complied with the Institutional Review Boards of CHOP and the Georgia Institute of Technology.

  • Provenance and peer review Not commissioned; internally peer reviewed.

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