Predicting Peak VO2 in Adults with Congenital Heart Disease
Author Information
Author(s): Thomas Simon FitzMaurice, Scott Hawkes, Yuen Liao, Damien Cullington, Angella Bryan, James Redfern, Reza Ashrafi
Primary Institution: Liverpool Heart and Chest Hospital NHS Foundation Trust
Hypothesis
Can oxygen uptake efficiency slope at anaerobic threshold predict peak VO2 in adults with congenital heart disease?
Conclusion
Oxygen uptake efficiency slope at anaerobic threshold can be used to calculate peak VO2 in adults with congenital heart disease.
Supporting Evidence
- OUES at VAT was strongly correlated with PVO2 at various percentages of maximum exercise.
- The study included a large cohort of adults with diverse congenital heart conditions.
- Linear regression modeling was used to create a predictive equation for PVO2.
- Mean peak VO2 was 23.3 ml/min/kg in the study population.
- VAT was found to be 66.5% of the achieved PVO2 on average.
- OUES provides a submaximal measure of cardiovascular fitness.
- The predictive model showed no significant difference between calculated and actual PVO2 values.
- OUES can be measured even in patients who cannot perform maximal exercise tests.
Takeaway
This study shows that a specific measurement during exercise can help doctors figure out how fit someone with heart problems is, even if they can't do a full exercise test.
Methodology
The study involved analyzing data from patients who completed maximal cardiopulmonary exercise testing, focusing on the relationship between oxygen uptake efficiency slope and peak VO2.
Potential Biases
Selection bias may exist as individuals unable to complete a maximal exercise test were excluded.
Limitations
The study was single-centre and did not include non-CHD healthy comparators, which may limit generalizability.
Participant Demographics
391 adults with congenital heart disease, 177 female, average age 32 years.
Statistical Information
P-Value
<0.001
Confidence Interval
−306 to −356
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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