Key result
CPX testing grades functional capacity, predicts cardiac reserve, and distinguishes cardiac from ventilatory exertional dyspnea.
Why the study?
Noninvasive cardiopulmonary exercise testing provides information beyond myocardial ischemia detection, including assessment of cardiac and ventilatory reserves and functional capacity.
What is the clinical utility of cardiopulmonary exercise testing beyond the detection of myocardial ischemia?
What is the clinical utility of cardiopulmonary exercise testing beyond the detection of myocardial ischemia?
Cardiopulmonary exercise testing is a valuable noninvasive tool for assessing functional capacity, cardiac reserve, and the etiology of exertional dyspnea.
May guide exertional dyspnea evaluation now; leaves open prospective outcome trials.
Noninvasive cardiopulmonary exercise (CPX) testing has proven useful in the assessment of heart and lung disease, including cardiac and ventilatory reserves. CPX includes the monitoring of respiratory gas exchange, O2 uptake the CO2 production, together with minute ventilation and its components--tidal volume and respiratory rate--together with surveillance of electrocardiography and blood pressure during supervised, incremental exercise. Exercise responses in anaerobic threshold and/or maximal O2 uptake are used to grade functional capacity objectively and to predict cardiac reserve (exercise cardiac output), which grades the severity of chronic cardiac or circulatory failure. CPX also serves to distinguish primary cardiac from ventilatory-based exertional dyspnea.
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Karl T. Weber (1997) conducted a review in Heart and lung disease. Cardiopulmonary exercise (CPX) testing was evaluated. Cardiopulmonary exercise testing is useful for grading functional capacity, predicting cardiac reserve, and distinguishing primary cardiac from ventilatory-based exertional dyspnea.
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