To take an ECG reading from the Apple Watch, users will need to place a finger on the Digital Crown while wearing the watch. The reading is completed in just 30 seconds, allowing users to determine whether their hearts are beating in a regular pattern or if there are signs of atrial fibrillation, which can be an indicator of serious health problems.
應該要另一隻手按住個digital crown去close circuit 先出到心電圖,都make sense
如果佢長期mon住,粒電都唔知玩唔玩到幾個鐘