Heart disease is the No. 1 cause of death for men and women in the United States. Eating a healthy diet and exercising help keep the heart healthy along with regular checkups with a doctor. While doctors routinely check blood pressure, glucose levels and HDL (“good” cholesterol) and LDL (“bad” cholesterol) levels, there are three heart screenings that many people are not familiar with and can help prevent serious cardiac events even if there aren’t any symptoms.