![Apple, J&J to study if Apple Watch app leads to lower stroke risk](http://news.littlecdn.com/600x360/1582651683_5e555923dff126.12256891.jpeg)
Apple, J&J to study if Apple Watch app leads to lower stroke risk
Johnson & Johnson said on Tuesday it would partner with Apple Inc on a study to use an iPhone app and the Apple Watch to study how earlier detection of atrial fibrillation impacts stroke in people aged 65 or older.