![]() ![]() ![]() Cardiac stroke volume reserve was estimated at rest and at anaerobic threshold by using oxygen consumption/pulse and previously validated estimates of the arteriovenous oxygen content difference.Ĭardiopulmonary exercise tests were performed on 40 patients with post-PE dyspnea. Physiological V D/V T was determined at anaerobic threshold from exhaled CO 2 and transcutaneous Pco 2 (validated against Paco 2 measurements). This retrospective study analyzed a consecutive series of incremental symptom-limited cardiopulmonary exercise tests that had been ordered to evaluate persistent dyspnea on exertion following long-term treatment for acute PE. Increased physiological dead space proportion (V D/V T) and decreased cardiac stroke volume reserve may distinguish persistent effects of PE itself from symptoms reflecting comorbid conditions or deconditioning. Many patients with pulmonary embolism (PE) report dyspnea on exertion following long-term treatment. ![]()
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