Standard troponin assays can be a crucial tool in diagnosing myocardial infarction, but have also been criticized for their low specificity at the time of presentation. Will newer, more sensitive troponin assays improve early detection and diagnostic accuracy for MI? Even with use of the newer assays, Dr. David Morrow, associate professor of medicine at Harvard Medical School, warns that elevated troponin may not necessarily indicate myocardial infarction. What other clinical evidence can physicians use to assess for an acute coronary syndrome? Dr. Janet Wright hosts.