Cardiopulmonary exercise testing and pulmonary function testing for predicting the severity of CTEPH

Area of Science:

• Cardiopulmonary physiology
• Pulmonary hypertension diagnostics

Background:

• Cardiopulmonary exercise testing (CPET) and pulmonary function testing (PFT) are noninvasive methods for evaluating respiratory and circulatory systems.
• Chronic thromboembolic pulmonary hypertension (CTEPH) requires effective noninvasive monitoring and evaluation methods.

Purpose of the Study:

• To evaluate and monitor CTEPH noninvasively using CPET and PFT.
• To assess the predictive value of CPET and PFT parameters for severe CTEPH.

Main Methods:

• Utilized data from 86 CTEPH patients, divided into test and validation sets.
• Collected and compared clinical, PFT, and CPET data from patients with varying CTEPH severity.
• Employed logistic regression and ROC curve analysis to determine predictive values for severe CTEPH.

Main Results:

• Minute ventilation at anaerobic threshold (VE @ AT) and oxygen uptake at peak (VO2 @ peak) were identified as independent predictors of severe CTEPH.
• The efficacy of VE @ AT (AUC=0.769) and VO2 @ peak (AUC=0.740) in identifying severe CTEPH was moderate.
• Combining VE @ AT and VO2 @ peak demonstrated a moderate utility (AUC=0.843) for predicting severe CTEPH.

Conclusions:

• CPET and PFT offer effective noninvasive methods for evaluating and monitoring CTEPH severity.
• These testing modalities possess predictive value for identifying severe cases of CTEPH.