Does Repeated Measurement of a 6-Min Walk Test Contribute to Risk Prediction in Children with Dilated Cardiomyopathy?van der Meulen, M. H., den Boer, S., Sarvaas, G. J. D. M., Blom, N. A., Ten Harkel, A. D. J., Breur, H. M. P. J., Rammeloo, L. A. J., Tanke, R., Helbing, W. A., Boersma, E. & Dalinghaus, M., 12-Nov-2019, In : Pediatric cardiology. 7 p.
Research output: Contribution to journal › Article › Academic › peer-review
A single 6-min walk test (6MWT) can be used to identify children with dilated cardiomyopathy (DCM) with a high risk of death or heart transplantation. To determine if repeated 6MWT has added value in addition to a single 6MWT in predicting death or heart transplantation in children with DCM. Prospective multicenter cohort study including ambulatory DCM patients >= 6 years. A 6MWT was performed 1 to 4 times per year. The distance walked was expressed as percentage of predicted (6MWD%). We compared the temporal evolution of 6MWD% in patients with and without the study endpoint (SE: all-cause death or heart transplantation), using a linear mixed effects model. In 57 patients, we obtained a median of 4 (IQR 2-6) 6MWTs per patient during a median of 3.0 years of observation (IQR 1.5-5.1). Fourteen patients reached a SE (3 deaths, 11 heart transplantations). At any time during follow-up, the average estimate of 6MWD% was significantly lower in patients with a SE compared to patients without a SE. In both patients groups, 6MWD% remained constant over time. An absolute 1% lower 6MWD% was associated with an 11% higher risk (hazard) of the SE (HR 0.90, 95% CI 0.86-0.95 p <0.001). Children with DCM who died or underwent heart transplantation had systematically reduced 6MWD%. The performance of all patients was stable over time, so repeated measurement of 6MWT within this time frame had little added value over a single test.
|Number of pages||7|
|Publication status||E-pub ahead of print - 12-Nov-2019|
- Dilated cardiomyopathy, Heart failure, Pediatric cardiology, Risk factors, 6MWT, CHRONIC HEART-FAILURE, TRANSPLANTATION, MANAGEMENT, DISTANCE