Some patients experience high heart rates and symptoms of light-headedness, fatigue, headache during standing despite well maintained blood pressure. These patient are disabled and can't be in upright position for a longer time. The purpose of this study is to test whether electrical stimulation of a nerve through a skin of the ear may improve heart rate response and reduce disabling symptoms.
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Heart Rate (average of 1 minute)
Timeframe: [-5,0,5,10,15,20,..,50 min] relative time from tilt