Researchers say they may know why a young American man or woman unexpectedly goes into cardiac arrest and dies.A study of more than 6 million U.S. military recruits, including over 100 cases of sudden cardiac death, has found that the primary causes were cardiac arrhythmia and a structural problem in the coronary arteries.Sudden cardiac death is a leading cause of death in the United States, taking more than 400,000 lives each year."This finding is revolutionary,” said lead researcher Dr. Robert E. Eckart, a cardiologist from Brooke Army Medical Center in San Antonio, Texas. “Previously, it was thought the leading cause of sudden cardiac death in younger people was abnormal muscle thickening of the heart.”
