Haemodynamics of (pre)syncope during carotid sinus massage: a beat-to-beat analysis of haemodynamic parameters during carotid sinus massage. - de Lange FJ; Gagaouzova BS; Thijs RD; van Rossum IA; van Dijk JG; de Jong JSY (Clinical autonomic research : official journal of the Clinical Autonomic Research Society, 2026)