The United States what do cetirizine pills look like Every year, 500,000 Americans have a heart attack as their first symptom of coronary artery disease (CAD), or atherosclerosis. âUnfortunately, 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. âThe 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
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