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Figure 1 Heart rate and blood pressure changes during the control and saline tilt sequences. Heart rate increased markedly (A) and blood pressure (B) decreased early during the control tilt. A significant decrease in blood pressure presaged syncope; this occurred first and was subsequently accompanied by a significant decrease in heart rate. The hemodynamic changes were comparatively attenuated during the saline tilt. A small increase in heart rate between the early tilt and late tilt period was observed. #p < 0.05, early tilt or midtilt vs. supine. *p < 0.05, midtilt or late tilt vs. early tilt. +p < 0.05 faint/late tilt vs. midtilt.
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