A heart attack doesn’t always have symptoms, such as pain in your chest or shortness of breath. It’s possible to have a heart attack and not even know it. A silent heart attack can be mistaken for indigestion or a bout with the flu. According to the American Heart Association, upwards of 45 percent of all heart attacks are silent. On the next Mayo Clinic Radio program, cardiologist Dr. Sharonne Hayes will cover the symptoms and warning signs of silent heart attacks and why treatment is critical. Also on the program, parasitologist Dr. Bobbi Pritt explains how the lone star tick can cause a meat allergy. And, neonatologist Dr. Christopher Colby will discuss new research on the connection between swaddling and sudden infant death syndrome (SIDS).