Improving AF Detection in Cryptogenic Stroke

"For the duration of the study, participants in the active arm will be asked to make ECG recordings in three circumstances:~Routinely once per day from the day of randomisation till the 12-month visit after AF Catheter Ablation (they will be encouraged to do so at the same time each day with the option to set a reminder on the watch).~If the AW requests them to do so (the automatic AF-notification algorithm will be active throughout the study period and if AF is suspected based on the tachogram, it will trigger notification for the participant to make an ECG recording). This will be till the 12-month time point.~If the patient has symptoms of palpitations, pre-syncope or syncope. This will be till the 12-month time point. Monitoring should continue even if AF has been diagnosed to characterise arrhythmia burden and profile. Participants will be given the contact details of a dedicated email inbox to which to send ECGs recorded through the AW."