P6630Changes of cerebral oxygen saturation measured by near infra-red spectroscopy in patients with vasovagal syncope during head-up tilt test, considering their age, gender and concomitant diseases. (28th August 2018) - Jedrzejczyk-Spaho, J; Pietrucha, A Z; Bzukala, I; Konduracka, E; Nessler, J