title: Substitute hearts.
mesh_terms: D003524:Cyclosporins / Q000627:therapeutic use; D005260:Female; D016027:Heart Transplantation; D006354:Heart, Artificial / Q000639:trends; D006801:Humans; D008297:Male; D009927:Tissue and Organ Procurement / Q000331:legislation & jurisprudence; D014481:United States