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Cardiovascular responses to treadmill exercise testing in anemia

R K Kapoor1, A Kumar, M Chandra

  • 1Department of Pediatrics, King George's Medical College, Lucknow.

Indian Pediatrics
|July 1, 1997
PubMed
Summary

Anemia in children significantly reduces exercise capacity and cardiovascular response. Anemic children showed lower exercise duration and metabolic equivalents compared to healthy peers.

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Area of Science:

  • Pediatric cardiology
  • Exercise physiology

Background:

  • Anemia is a common condition in children.
  • Its impact on exercise performance and cardiovascular responses requires further investigation.

Purpose of the Study:

  • To evaluate exercise performance and cardiovascular responses in anemic children using treadmill testing.
  • To compare these parameters between anemic children and healthy controls.

Main Methods:

  • Prospective case-control study involving 41 anemic children (mild to severe) and 11 healthy children (aged 7-12 years).
  • Subjects underwent exercise testing on a Quinton Model Q5000 treadmill using the Modified Naughton protocol.
  • Parameters measured included heart rate, blood pressure, double product, ECG changes, exercise duration, and metabolic equivalents (METs).

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Main Results:

  • While resting and peak exercise cardiovascular parameters showed no significant differences, anemic children exhibited significantly lower gains in heart rate, double product, exercise duration, and METs compared to controls (p < 0.001).
  • These findings suggest a blunted cardiovascular response to exercise in anemic children.

Conclusions:

  • Anemia in children leads to reduced exercise capacity.
  • The blunted cardiovascular responses are attributed to a depleted cardiac reserve in anemic individuals.