Atrial fibrillation symptoms often begin subtly, with a fluttering or irregular heartbeat that comes and goes or persists without warning. Many people first learn they have AFib only after a routine check reveals an abnormal pulse or ECG pattern, despite feeling fine. Because the atria — the heart's upper chambers — quiver rather than contract effectively, blood does not move smoothly into the ventricles, creating an irregular heartbeat that feels fast, erratic, or "skippy."
This irregular rhythm has real consequences: it can reduce cardiac output, cause fatigue, dizziness, and significantly increase the risk of stroke. Understanding both the physical sensations and the underlying mechanisms helps people act early. Recognizing how AFib causes conditions like palpitations, breathlessness, and risk of blood clots empowers individuals and caregivers to seek timely evaluation and tailored treatment.
