So far, fewer than 1 percent of patients taking these medicines — called checkpoint inhibitors — have developed heart trouble. But in those who do, the damage can be severe, and the drugs have led to several deaths by provoking the immune system to attack the heart. The risk appears highest when patients take two different checkpoint inhibitors at once. Read more . . .
Powerful drugs that enlist the immune system to fight cancer can, in rare cases, cause heart damage, doctors are reporting.