Apple Watch provides potentially life-saving benefits

The Apple Watch can provide monitoring of various health markers, during rest, exercise and even sleep. This can provide various clues to potential health issues.

As the below linked article indicates, this is exactly what the Watch provided. An “Apple Watch user in Washington has credited his Apple Watch with alerting him that his atrial fibrillation had returned.” Because of this history of health markers that the Watch provided, his doctor was then able to put him on blood thinners to prevent a possible stroke.