Imagine your heart’s electrical system as a complex circuit that requires stability to function correctly. A lack of sleep is like subjecting that circuit to constant power surges, putting it on a short fuse and making it highly susceptible to malfunctions like irregular heartbeats.
This instability is caused by the disruption of your autonomic nervous system. Sleep deprivation keeps your “fight or flight” (sympathetic) system in overdrive. This system releases adrenaline-like chemicals that can make the heart’s electrical cells more excitable and irritable, leading to extra or skipped beats (palpitations).
For some individuals, this irritability can trigger more sustained and dangerous arrhythmias. Atrial fibrillation (AFib), a condition where the heart’s upper chambers quiver chaotically, is strongly linked to poor sleep and sleep disorders like sleep apnea. AFib is a major risk factor for stroke because it allows blood to pool and clot in the heart.
Protecting your heart’s rhythm requires giving your nervous system the chance to reset each night. Consistent, quality sleep allows the calming “rest and digest” (parasympathetic) system to take over, which stabilizes the heart’s electrical activity. If you’re experiencing frequent palpitations, improving your sleep hygiene should be your first line of defense.