What Is Atrial Fibrillation (AFib)? Symptoms and Risks
Atrial fibrillation (AFib) is a condition where the atria contract irregularly and chaotically — instead of beating steadily, the atria "fibrillate." It is the most common heart rhythm disorder, affecting about 1–2% of the population. The greatest danger is that AFib causes blood to pool in the heart, forming clots and raising stroke risk 5-fold. Many people have AFib without obvious symptoms.
Reference ranges
* Reference values only. Consult a doctor for personalized advice.
Common AFib symptoms
Palpitations or an irregular heartbeat (sensation of fluttering, skipping); unusual fatigue with mild exertion; shortness of breath without physical effort; dizziness or lightheadedness; chest pain or pressure. Alarmingly, about 30% of AFib cases have no symptoms at all ("silent AFib") — detectable only through continuous heart rate monitoring.
Who is at high risk for AFib?
People over 60 (risk increases with age); those with high blood pressure, coronary heart disease, or heart failure; diabetics; obese individuals; those with a family history of AFib. Heavy alcohol use, excessive caffeine, chronic poor sleep, and prolonged stress are also AFib triggers.
Why 24/7 heart rate monitoring matters for AFib
AFib often occurs in episodes (paroxysmal AFib) — appearing and disappearing, sometimes lasting only minutes. A single ECG at a clinic frequently misses it. Continuous 24/7 heart rate monitoring helps detect abnormal episodes even when they occur at midnight or while you sleep. If H-Core detects persistently irregular heart rate patterns, this is a signal to visit a doctor for an ECG or Holter monitor.
Monitor Heart Rate Monitoring 24/7 with H-Core
Smart ring — no monthly fee.