Respiratory Training Late After Fontan Intervention: Impact on Cardiorespiratory Performance

Area of Science:

• Pediatric Cardiology
• Cardiorespiratory Physiology
• Rehabilitation Medicine

Background:

• Fontan palliation enables single ventricle patients to reach adulthood but often results in reduced exercise tolerance.
• Optimizing cardiorespiratory function is crucial for improving quality of life in these individuals.

Purpose of the Study:

• To evaluate the effectiveness of controlled respiratory training (CRT) in enhancing cardiorespiratory performance in adolescent Fontan patients.
• To assess the impact of CRT on exercise capacity and physiological responses.

Main Methods:

• A cohort of 16 adolescent Fontan patients was divided into a CRT group (n=10) and a control group (n=6).
• Maximal cardiopulmonary tests (CPTs) were conducted before and after CRT in the intervention group.
• The control group underwent CPTs after a 3-month period.

Main Results:

• The CRT group demonstrated significant improvements in cardiovascular and respiratory responses to exercise post-training.
• Key findings included decreased breathing respiratory reserve, increased respiratory rate peak, and elevated ventilation peak.
• Furthermore, the CRT group showed significant increases in predicted VO2, peak VO2, and VO2 workslope, alongside a doubling of exercise endurance time.

Conclusions:

• Controlled respiratory training is an effective intervention for improving cardiorespiratory performance in post-Fontan patients.
• CRT leads to enhanced aerobic capacity and exercise endurance, suggesting its potential role in rehabilitation strategies for this population.