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Figure 1 Percent of change of cardiomotor and vasomotor response to tilt. (A) Percentage change of heart rate, stroke volume and cardiac output from baseline supine to tilt position (70°) in the three groups of subjects: controls, tilt-positive patients and isoproterenol-positive patients. (B) Percentage change in systolic, diastolic and mean blood pressure (BP) and total peripheral resistance from supine to tilt position. *p < 0.05; ***p < 0.001.
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