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Functional single ventricle: cardiorespiratory response to exercise.

D J Driscoll, B A Staats, C T Heise

    Journal of the American College of Cardiology
    |August 1, 1984
    PubMed
    Summary
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    Children with functional single ventricle experience reduced exercise capacity, with performance worsening with age. This highlights the need for early surgical intervention in these patients.

    Area of Science:

    • Pediatric Cardiology
    • Exercise Physiology

    Background:

    • Functional single ventricle (FSV) physiology presents unique challenges in pediatric populations.
    • Understanding the cardiorespiratory response to exercise is crucial for managing these patients.

    Purpose of the Study:

    • To quantify the exercise intolerance in children with functional single ventricle.
    • To investigate the relationship between age and exercise performance in this cohort.

    Main Methods:

    • Cardiorespiratory exercise testing was performed on 27 children diagnosed with functional single ventricle.
    • Key parameters including exercise time, work performed, heart rate, oxygen uptake, and arterial oxygen saturation were measured.

    Main Results:

    • All patients exhibited significantly reduced exercise time, work performed, maximal heart rate, and maximal oxygen uptake.

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  • Systemic arterial blood oxygen saturation was also notably diminished across the cohort.
  • Exercise intolerance progressively worsened with increasing age, alongside excessive ventilation at rest and during exercise.

    • Conclusions:

    • Patients with functional single ventricle demonstrate significant exercise intolerance.
    • The age-dependent decline in exercise performance suggests that surgical correction should be considered before or during adolescence.