Abstract
We examined serial exercise test performance in children with congenital aortic stenosis (AS) treated surgically compared to that of nonoperated children with mild to moderate AS. Maximal treadmill exercise data were assessed in 21 children 5.5 ± 3.8 years after aortic valve (AO) surgery. Patients had undergone the Ross procedure (n = 6) or previous aortic valvotomy, balloon valvuloplasty, or neonatal aortic valvotomy (n = 15). Follow-up treadmill tests were conducted 3.7 ± 2.8 years later. Data were compared to those of 19 nonoperated AS patients (mean gradient by echocardiogram <50 mmHg). These patients were exercised 3.6 ± 3.2 years apart. Endurance time, heart rate, systemic blood pressure, and electrocardiogram were compared as repeated measures between tests and to age- and sex-matched normative data. Postsurgical children with AS had normal endurance times despite low peak heart rates on the initial test, and they maintained endurance over time. Nonoperated children with mean AO gradients <50 mmHg also had normal endurance times on the initial test but increased endurance over 3.6 years. Children with operated and nonoperated AS were able to reach or exceed normal endurance times, which may make it difficult to achieve compliance to imposed activity restrictions in this population.
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Acknowledgements
We thank Drs. Tom Weigel, Carl Backer, and Constantine Mavroudis for their assistance with the project and manuscript preparation. This work was supported in part by a grant from the Dr. Scholl Foundation.
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Mitchell, B., Strasburger, J., Hubbard, J. et al. Serial Exercise Performance in Children with Surgically Corrected Congenital Aortic Stenosis . Pediatr Cardiol 24, 319–324 (2003). https://doi.org/10.1007/s00246-002-0281-6
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DOI: https://doi.org/10.1007/s00246-002-0281-6