title: Pharmacological blockade.
mesh_terms: D000319:Adrenergic beta-Antagonists; D001340:Autonomic Nerve Block; D005730:Ganglionic Blockers; D006221:Halothane; D006801:Humans; D007023:Hypotension, Controlled; D007384:Intermittent Positive-Pressure Breathing; D011187:Posture
chemical_list: D000319:Adrenergic beta-Antagonists; D005730:Ganglionic Blockers; D006221:Halothane