A packet of envelopes imodium in pakistan Every year, 500,000 Americans have a heart attack as their first symptom of coronary artery disease (CAD), or atherosclerosis. â?Unfortunately, the first and last symptom of CAD can be a deadly heart attack â? millions of people are walking around with significant plaque buildup and no symptoms,â? says Hecht. â?The coronary calcium scan is a low-dose CT scan of the heart that helps identify asymptomatic patients who are likely to have a heart attack.â?
