The development of the defibrillator.
D000818:Animals; D004285:Dogs; D004554:Electric Countershock / Q000266:history / Q000295:instrumentation*; D004566:Electrodes; D000882:Haplorhini; D006336:Heart Massage; D049673:History, 20th Century; D006801:Humans; D008722:Methods; D013903:Thoracic Surgery; D013909:Thorax / Q000601:surgery; D014481:United States