Every one has a physiologic response to upright tilt. A normal response to upright tilt is shown. There is an increase in heart rate on the order of 15 beats per minute during the first 10 minutes of orthostasis.
Heart rate continues to rise slowly thereafter.
The upper limit for the heart rate increase is 30 beats per minute during the first 10 minutes in adults and somewhat greater in adolescents. There is a large increase in diastolic blood pressure so that the pulse pressure is typically decreased. This goes along with a decrease in cardiac stroke volume.