Journal
PEDIATRIC CARDIOLOGY
Volume 28, Issue 4, Pages 276-279Publisher
SPRINGER
DOI: 10.1007/s00246-006-0114-0
Keywords
heart rate; exercise test; exercise therapy; rehabilitation
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Funding
- NHLBI NIH HHS [5U01 HL068285] Funding Source: Medline
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We assessed heart rate (HR) recovery following peak exercise before and after a 12-week cardiac rehabilitation program in 14 children, 12.1 +/- 1.8 years of age, with repaired complex congenital heart disease (CHD; 11 with Fontan surgery) and impaired exercise performance. Exercise testing using bicycle ergometry was performed at baseline, after completion of the rehab program and 1.0 +/- 0.2 years after the baseline test. These data were compared to HR recovery in 15 controls (age, 12.7 +/- 2.4 years) with CHD (13 with Fontan surgery) with two serial exercise tests at an interval of 1.1 +/- 0.3 years. There was no change in peak HR between the two serial tests in either group. Peak VO2 improved in the rehab group (26.3 +/- 9.6 ml/kg/min at baseline vs 30.9 +/- 9.6 ml/kg/min after rehab, p = 0.01) but remained unchanged in controls on serial testing. One-minute HR recovery (in beats per minute) improved significantly following completion of the rehab program (27 +/- 15 at baseline vs 40 +/- 23 after rehab, p = 0.01). Partial improvement in 1-minute HR recovery in the rehab group persisted 1 year later (1-minute HR recovery, 35 +/- 19; p = 0.1 compared to baseline). There was no change in 1-minute HR recovery over time in the control group (37 +/- 16 vs 40 +/- 13, p = not significant). In conclusion, HR recovery following peak exercise improves in children with CHD after participation in a cardiac rehab program.
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