FOX10 first shared Rowe’s story in which she declares it was the Apple Watch that prevented her from experiencing a life-threatening stroke. As someone living with asthma, Rowe dismissed shortness of breath when walking around her home as her condition worsening.

Anne Rowe’s husband gifted her with an Apple Watch at Christmas, however, so she thought to give the watch’s ECG app a try. Apple Watch Series 4 (review) launched last fall with a built-in electrical heart rate sensor that can capture an electrocardiogram reading through the wrist and fingertip using Apple’s ECG app.

Users without AFib typically see a cardiac rhythm called sinus rhythm, but Rowe’s Apple Watch detect AFib due to an irregular heartbeat. The Mayo Clinic describes AFib as an “irregular and often rapid heart rate that can increase your risk of strokes, heart failure and other heart-related complications.”