title: Sub-optimal vigilance in patients with complete heart block: influence of cardiac pacing and a "nootropic" substance.
mesh_terms: D000328:Adult; D001143:Arousal / Q000187:drug effects; D002304:Cardiac Pacing, Artificial; D005260:Female; D006327:Heart Block / Q000523:psychology*; D006801:Humans; D008297:Male; D008570:Memory, Short-Term / Q000187:drug effects; D008606:Mental Processes / Q000187:drug effects*; D009609:Nitrous Oxide / Q000494:pharmacology*; D014706:Verbal Learning / Q000187:drug effects
chemical_list: D009609:Nitrous Oxide