[Guidance to the Interpretation of Cardiopulmonary Exercise Testing]

Area of Science:

• Cardiology
• Pulmonology
• Exercise Physiology

Background:

• Cardiorespiratory fitness is a key predictor of morbidity and mortality.
• Patient-reported exercise intolerance often poorly correlates with resting tests.
• Cardiopulmonary exercise testing (CPET) provides a comprehensive assessment of exercise response.

Purpose of the Study:

• To describe the physiological principles underlying CPET.
• To provide guidance on CPET indications, methodology, and interpretation.
• To promote wider utilization of CPET in clinical practice.

Main Methods:

• Review of physiological principles of cardiopulmonary responses during exercise.
• Compilation of established guidelines for CPET indications.
• Description of standardized CPET methodology and interpretation strategies.

Main Results:

• CPET integrates cardiocirculatory, pulmonary, and metabolic assessments.
• It identifies causes of exercise limitation, monitors disease, and predicts prognosis.
• Despite its value, CPET is underutilized due to cost, reimbursement, and expertise barriers.

Conclusions:

• CPET is the gold standard for evaluating exercise limitation and prognosis.
• This review aims to demystify CPET, making it more accessible to clinicians.
• Simplified guidance can overcome barriers to CPET utilization.