Atrial fibrillation (AFib) is a heart rhythm disorder that begins in the atria, which are the heart’s upper chambers. It affects millions of people in the country but often goes unnoticed until major complications arise. This article sheds light on the subtle warning signs of atrial fibrillation, allowing individuals to recognize them early and seek medical attention promptly. One can take proactive steps to safeguard heart health by understanding these indicators. Here are the warning signs of atrial fibrillation: Unpredictable heartbeats:  One of the primary indicators of atrial fibrillation is irregular heartbeats. In a healthy heart, the atria (upper chambers) and ventricles (lower chambers) work harmoniously, contracting and relaxing rhythmically. However, in AFib, the atria quiver chaotically, leading to an irregular and often rapid heartbeat. This erratic pulsing, known as palpitations, can indicate something is amiss with the heart’s electrical system. Fatigue and lethargy:  Persistent fatigue and unexplained tiredness can be early warning signs of atrial fibrillation. When the heart beats irregularly, it may not pump enough blood to meet the body’s needs. This reduced blood flow can leave individuals feeling drained and sluggish, even after a full night’s rest. Shortness of breath: Atrial fibrillation can lead to a sensation of breathlessness, even during routine activities.