Key result
Adolescents with POTS exhibit two subgroups characterized by either high venous pressure with low blood flow or normal venous pressure with high blood flow compared to controls.
Why the study?
What are the reflex vascular defects in adolescents with postural orthostatic tachycardia syndrome during head-up tilt?
Population
22 adolescent patients with postural orthostatic tachycardia syndrome, aged 12-18 years, and 13 normal…
Comparison
70 degrees head-up tilt vs Supine position and normal controls
Design
Case-control
Authors
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May distinguish vascular phenotypes in adolescent POTS; hypothesis-generating and requires prospective validation before clinical adoption.
Case-Control (n=35)
What are the reflex vascular defects in adolescents with postural orthostatic tachycardia syndrome during head-up tilt?
Absolute Event Rate: 30% vs 13%
Adolescents with POTS can be categorized into two distinct pathophysiological subgroups characterized by either high venous pressure with low flow or normal venous pressure with high flow.
Stewart et al. (2001) conducted a case-control in Postural orthostatic tachycardia syndrome (POTS) (n=35). Postural orthostatic tachycardia syndrome (POTS) vs. Normal controls was evaluated on Supine leg venous pressure (Pv) in the high Pv subgroup. Adolescents with POTS exhibit two subgroups characterized by either high venous pressure with low blood flow or normal venous pressure with high blood flow compared to controls.
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