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. 2017 Sep 15;56(20):2791–2796. doi: 10.2169/internalmedicine.8758-16

Figure 2.

Figure 2.

The results of an orthostatic tolerance test that was performed in the morning. The horizontal axis represents the time course. The upper panel shows a >30 beat per minute increase in her heart rate without hypotension soon after changing from the supine position to an upright position. This increased heart rate was sustained until she lay down. The lower panel shows the burden of symptoms, including lumbago, headache, and dizziness, which was assessed using subjective symptom rating scales. The symptoms were scored from 0 to 10, with higher scores reflecting worse subjective symptoms. Her symptom scores increased markedly after changing to an upright position.