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Conventional active 10-min standing test recordings in a 27-year-old female patient (Patient 10) with myalgic encephalomyelitis. The patient completed the 10-min standing test under normal hemodynamics with fatigue (Upper). However, in a test 6 months later, she failed to keep standing during the test due to dyspnea after 5 min with postural orthostatic tachycardia syndrome (Lower). BP, blood pressure; HR, heart rate.
