title: Assistor for direct mechanical heart massage.
mesh_terms: D000818:Animals; D001698:Biomedical Engineering; D004285:Dogs; D004582:Electronics, Medical / Q000295:instrumentation*; D006323:Heart Arrest / Q000628:therapy; D006336:Heart Massage / Q000295:instrumentation*; D006801:Humans; D008722:Methods; D014586:USSR