Angioplasty: practice makes "better".
D015906:Angioplasty, Balloon, Coronary / Q000401:mortality / Q000706:statistics & numerical data*; D003327:Coronary Disease / Q000628:therapy*; D017052:Hospital Mortality; D006761:Hospitals / Q000592:standards; D006801:Humans; D017063:Outcome Assessment, Health Care; D014481:United States