Conclusions
Tilt-positive patients who develop reflex syncope have statistically highly significantly lower systolic and diastolic blood pressure and heart rate, albeit small in clinical terms, compared with tilt-negative patients. Advanced age and hypertension, independent of therapy, are two important factors diminishing hypotensive susceptibility to tilt-induced reflex syncope. These hemodynamic differences in reflex syncope susceptibility may be considered as contributing to the understanding of hypotensive susceptibility within the phenomenon of vasovagal syncope.