
Left-Side Sleep Myth Debunked: Heart Health Depends on Sleep Quality, Not Position
A cardiologist says there’s no solid evidence that sleeping on the left side is universally better or worse for the heart; the bigger concern is sleep quality and undiagnosed sleep apnea, which can raise blood pressure and trigger atrial fibrillation. The key to heart health is getting seven to nine hours of good sleep and seeking diagnosis and treatment (like CPAP) if sleep apnea is suspected. Choose the most comfortable sleep position, monitor for apnea symptoms (daytime fatigue, snoring, morning headaches), and focus on overall sleep health rather than any single sleeping posture.











