What type of arrhythmia is atrial fibrillation?

• A. A slow and regular heartbeat
• B. A rapid and irregular heartbeat originating from the atria
• C. A consistent and fast heartbeat
• D. A skipped heartbeat pattern

Answer: (B)

Atrial fibrillation is characterized as a rapid and irregular heartbeat that originates from the atria. This arrhythmia occurs when the electrical signals in the atria become disorganized, leading to chaotic impulses that cause the atria to flutter rather than contract effectively. As a result, the heart rate can vary widely and often exceeds 100 beats per minute. The irregularity of the heartbeat is a hallmark feature, distinguishing atrial fibrillation from other arrhythmias that may present as regular or consistently paced rhythms. Additionally, this condition can increase the risk of stroke due to blood clots that may form as a result of the ineffective pumping action of the atria. Understanding the nature of atrial fibrillation as both rapid and irregular is crucial for proper diagnosis and management of the condition.