SUNRISE
HEARTBEAT CHRONICLES

Have you ever felt your heart flutter for a few seconds and wondered whether it was normal? Or noticed your smartwatch flag an irregular rhythm, only to dismiss it because you felt fine? Most of the time, an odd beat here or there is not a cause for concern. But some irregular heartbeats have a specific pattern behind them, and that pattern has a name worth knowing. This article walks you through what atrial fibrillation is, how it may feel, why it matters, and when a review