Atrial fibrillation is a common cardiac arrhythmia characterized by rapid and irregular beating of the atria, leading to inefficient blood flow and increased risk of stroke. This condition results from chaotic electrical signals in the atria, which disrupt the normal rhythmic contractions of the heart, often causing palpitations, fatigue, and other symptoms. Understanding atrial fibrillation is crucial for interpreting ECGs accurately, as its presence alters the typical waveform patterns observed in electrocardiography.
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