Cardiopulmonary Exercise Testing
A comprehensive evaluation combining exercise stress testing with respiratory gas analysis to assess functional capacity and exercise limitations in congenital heart patients.
Full Definition
Cardiopulmonary exercise testing (CPET) is a noninvasive diagnostic tool that provides comprehensive assessment of cardiovascular, pulmonary, and metabolic responses to exercise. The test involves continuous monitoring of oxygen consumption, carbon dioxide production, ventilation, and cardiovascular parameters during graded exercise on a treadmill or cycle ergometer. In congenital cardiology, CPET is invaluable for objectively quantifying functional capacity, identifying exercise limitations, guiding activity recommendations, and monitoring disease progression or treatment response. Key parameters include peak oxygen consumption (VO₂ max), anaerobic threshold, ventilatory equivalents, and chronotropic response, which help differentiate cardiac from pulmonary causes of exercise intolerance.
Usage
Usage note: Distinguish from simple exercise stress testing, which does not include gas exchange analysis.
In Context
- "Cardiopulmonary exercise testing revealed reduced peak oxygen consumption consistent with exercise intolerance in this Fontan patient." — Exercise physiology report
- "Serial cardiopulmonary exercise testing demonstrated improved functional capacity following cardiac rehabilitation." — Follow-up clinic note