title: Improvement in ventilation and perfusion.
mesh_terms: D015765:Almitrine; D000697:Central Nervous System Stimulants / Q000627:therapeutic use*; D006801:Humans; D010879:Piperazines / Q000627:therapeutic use*; D014692:Ventilation-Perfusion Ratio / Q000187:drug effects*
chemical_list: D000697:Central Nervous System Stimulants; D010879:Piperazines; D015765:Almitrine