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Dr. Oz explains heart attack warning signs you need to know

05:44

According to the American Heart Association someone in the U.S. has a heart attack, approximately every 40 seconds. Dr. Mehmet Oz, a cardiothoracic surgeon and host of the "Dr. Oz Show," visits TODAY to explain important warning signs, including abdominal discomfort and shortness of breath. He also talks about the importance of good nutrition, exercise and public service.