Cardiopulmonary exercise testing (CPet)
Cardiopulmonary exercise testing may be useful in the evaluation of patients with unexplained dyspnea since there is a characteristic pattern of ventilatory and circulatory response in the presence of pulmonary vascular disease. However, sensitivity and specificity for the diagnosis of pulmonary hypertension are unknown. Moreover, patients often are too severely ill to perform maximal stress testing [8,9].
Therefore, exercise testing is not considered essential in the evaluation of patients with pulmonary hypertension but might be useful in to rule out other diseases responsible for the patients’ dyspnea.