How is Atrial Fibrillation commonly diagnosed?

• A. Chest X-ray
• B. CT angiogram
• C. Electrocardiogram
• D. Blood test

Answer: (C)

Atrial fibrillation is commonly diagnosed through an electrocardiogram (ECG or EKG), which is a crucial tool for assessing the electrical activity of the heart. This test provides a graphical representation of the heart's rhythm and can quickly reveal irregularities typical of atrial fibrillation, such as an absence of distinct P waves and an irregularly irregular ventricular response.

While other diagnostic methods like chest X-rays, CT angiograms, and blood tests can provide valuable information about the heart and circulatory system, they are not specific for diagnosing atrial fibrillation. A chest X-ray might indicate heart enlargement or fluid in the lungs but does not reflect the rhythm of the heart. A CT angiogram is primarily used to visualize blood vessels and is more targeted towards identifying blockages or other vascular issues. Blood tests can evaluate overall health and check for conditions like thyroid dysfunction, which may contribute to afib but do not determine whether atrial fibrillation is present. Thus, the electrocardiogram stands out as the definitive diagnostic tool for atrial fibrillation.