This is termed “pre-excitation” and results in a shortened PR interval on the ECG. The combination of WPW and atrial fibrillation can potentially be fatal, especially if AV blocking agents are ...

an Apple Watch wearer fired up the ECG app out of sheer curiosity. The app subsequently alerted him that he had signs of atrial fibrillation, which is to say his heart beat was irregular.

The 36-year-old was diagnosed with Wolff-Parkinson-White syndrome and paroxysmal atrial fibrillation in 2015 and had the pacemaker fitted in 2020. Upon finishing the row, he said: "Yes ...