Fig. 2.

Proposed approach and future perspectives to prevent cardiac death during marathon. Five runners had their electrocardiogram (ECG) waveform monitored remotely in the central office using an iPhone with Global Positioning System (GPS) information. ECG overview in this trial is shown as representative data, which includes detailed waveform and heart rate trend during marathon. In addition, our future perspectives are indicated following this initial trial. AED, automated external defibrillator.