How can I help my doctor understand episodes of arrhythmia-related symptoms if they don't occur during clinic visits?

You can record the date, start and end time, activity at the time, heart sensations, and whether there was chest discomfort, shortness of breath, dizziness, or fainting, and save raw recordings from wearable devices for your doctor's reference. Device alerts cannot be used for self-diagnosis; if fainting or severe discomfort occurs, seek help immediately.