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Throughout the United States, and especially in big cities and rural areas, tens of thousands of people with hearts that should be good __________ to keep them alive die each year for lack of adequate first aid. In New York City, for example, a new study has shown that only one person in 100 outside of hospitals _____ _____after the heart suddenly stops pumping . In contrast, in Seattle, the survival _____ _____ after such heart attacks is one in five. The difference can be traced _____ _____the effectiveness of the chain of survival, Dr. Joseph P. Ornato said. Each link in the __________ must be strong enough for many lives to be __________. The chain begins with an immediate telephone__________ for emergency help and the start within four minutes of the process needed for restarting the _____ _____working, by a family member or bystander . It continues with the prompt arrival-within eight __________ ten minutes of a rescuer equipped with a special instrument that can shock the heart back to a normal rhythm. And it ends with the administration of advanced emergency care by nurses to maintain the hearts ability to survive until the doctors at the hospitals can take __________. When one or more links in this chain fail or function too slowly, the __________ of a victim surviving heart attack falls rapidly. Because of widespread weaknesses in the chain of __________, experts in emergency heart care estimate that 20,000 to 80,000 people __________ needlessly of heart attack each year, a number comparable to the 55,000 killed annually in automobile __________. | 
