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Volume depletion was excluded as a cause for hypotension.Our patient showed low plasma catecholamine levels and marked pressor hypersensitivity to norepinephrine infusion.Hypotension and bradycardia were reversed by atropine infusion.The heart rate freed from autonomic influences,ie,after atropine plus propranolol infusion,was normal.In ciguatera fish poisoning, orthostatis hypotension appears to be a result of both parasympathetic excess and sympathetic failure. |
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