In this Saturday, March 29, 2014 photo, people attend the American College of Cardiology's Annual Scientific Session and Expo in Washington. A large study in Sweden found that a blood test plus the ... more 
In this Saturday, March 29, 2014 photo, people attend the American College of Cardiology's Annual Scientific Session and Expo in Washington. A large study in Sweden found that a blood test plus the usual electrocardiogram of the heartbeat were 99 percent accurate at showing which patients could safely be sent home rather than be admitted for observation and more diagnostics. (AP Photo/Susan Walsh) less 
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Associated Press | Photo By Susan Walsh
Sun, Mar 30, 2014 2:32 PM EDT