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Overlapping causes of symptomatic nOH (Venn diagram): 1) autonomic failure of NE pathways upon standing; 2) dopaminergic and other medications causing lower SBP; and 3) suboptimal hydration leading to reduced circulating blood volume.
Note: *Medications include dopaminergic, diuretics, central adrenergic inhibitors, alpha-1 antagonists, nitrates.
Abbreviations: nOH, neurogenic orthostatic hypotension; SBP, systolic blood pressure; s-SBP, standing SBP.
