Question

Based on the provided ECG description (Atrial Fibrillation), which of the following statements is correct?

A) The P wave is absent, and there are no QRS complexes following the P waves, indicating irregular electrical activity in the atria and a narrow complex rhythm.

B) The P wave is present, and there are narrow complex QRS complexes following the P waves, indicating normal atrial depolarization.

C) The PR interval is unable to be determined, suggesting a potential conduction abnormality in the atria.

D) The rhythm is regular, and the rate is 70 beats per minute, indicating a stable and normal heart rate.

Answer 1

The correct statement for atrial fibrillation in an ECG reading is that the P wave is absent and there are no regular QRS complexes following the P waves, indicating irregular atrial activity.

Step-by-step explanation:

Based on the description of atrial fibrillation (AFib) in an ECG, the correct statement is: The P wave is absent, and there are irregular intervals between QRS complexes, indicative of irregular atrial activity and a narrow complex rhythm. This aligns with option A, which states that the P wave is absent and there are no QRS complexes following the P waves, indicating irregular electrical activity in the atria and a narrow complex rhythm. Atrial fibrillation is characterized by a lack of distinct P waves due to erratic electrical impulses in the atria, causing an irregular heartbeat. The PR interval is indeed unable to be determined due to the absence of discernible P waves. In AFib, the atrial depolarization is not orderly leading to an inconsistent and often rapid ventricular response.