We all know that a lousy night's sleep can leave us feeling drained the next day. Now a study has found another reason to catch more Z's: poor sleep is tied to significantly higher odds of experiencing atrial fibrillation (A-Fib)—irregular heartbeats that can lead to blood clots, heart failure, stroke and other heart-related problems—the following day. A bad night of sleep was associated with a 15% greater risk of having an A-Fib episode, and continued poor sleep was associated with longer episodes of A-Fib. The researchers noted that it is important to treat underlying disease that may be causing A-Fib,...