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Treadnull tests were perfonned in 48 patients wilh rheutnatic tnitral regurgitation ranging in agefron 9 to I8 1'ears, cotrsisted oJ 17 bo1's and 3 1 girls. The ilethod used was Bruce protocol. Patients with heartfailure or other valvular defects were excluded frotn this stud)t. Thirty-eight (79.2%) patients, 15 bol,s and 23 girls, could reach stage 4 or ,ilore. Shorter endurance titne was associated with increasing age and larger bod1, surface area, both itt bo1's and girls. In the group of parients with cardiotnegall, in their x-ra1, photos, 83.3% of the boys and 70.0% of the girls could reach stage 4 or nore in, while in those v,irhout cardiotnegall, IOO% of the boys and 76.1% of the girls could achieve stage 4 or nrore. Patients with LVH on their ECGs could reach stage 4 or nore in 87.5% of the boys and 85.7Vo of the girls, while patients v,ithout LVH could reach stage 4 or nore in 88.8% of the bol's and 70.0% of the girls. We conclude that: (l) treadtnill test is quite safefor children u,ith tuild and tnoderate rheunatic uitral regurgitation; (2) older age and larger body surface area are associated with low,er endurance, (3) cardiouegaly on chest X-ray c4, be used as a guidefor e.rercise restrictiott itt that group, but this is,lot true with ECG-LVH.

Treadmill test in patients with rheumatic mitral regurgitation