Why the study?
Does hypovolemia increase the incidence of vasovagal response during head-up tilt in patients with history of syncope or presyncope?
Population
45 patients with history of syncope or presyncope. 30 patients had hypovolemia, and 15 patients were…
Comparison
Hypovolemia vs Normovolemia
Design
Cohort
Authors
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Supine hypovolemia was not associated with vasovagal response during HUT; leaves open volume repletion as a syncope target in prospective studies.
Does hypovolemia increase the incidence of vasovagal response during head-up tilt in patients with history of syncope or presyncope?
Supine total blood volume does not predict the occurrence of vasovagal response to head-up tilt, although accentuated orthostatic tachycardia is more prevalent in hypovolemic patients.
Jaeger et al. (1993) studied this question.
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