In which type of arrhythmia do the atria contract very quickly and "out of sync" with the rest of the heart because of an error in the heart's electrical system?

A. atrial fibrillation
B. atrial flutter
C. ventricular tachycardia
D. Obradyarrhythmia

atrial fibrillation

Explanation:

Atrial fibrillation is an irregular and often rapid heart rate that occurs when the two upper chambers of your heart experience chaotic electrical signals. The result is a fast and irregular heart rhythm. The heart rate in atrial fibrillation may range from 100 to 175 beats a minute

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