Hypertension or high blood pressure, which can lead to heart attack and stroke, the two top causes of death in the United States, is one of the most widespread chronic illnesses in America, afflicting nearly half of adults. In a recent Annenberg Public Policy Center (APPC) health survey, 35% of respondents report having been diagnosed with high blood pressure and two-thirds of this group say they’re somewhat or very worried about having high blood pressure. But the survey finds that few U.S. adults – including those who have been diagnosed with high blood pressure – can correctly identify what blood pressure reading…