Final answer:
To diagnose AFib, healthcare professionals use methods such as an electrocardiogram (ECG) and Holter monitoring. Blood tests may also be performed to check for underlying conditions.
Step-by-step explanation:
To diagnose atrial fibrillation (AFib), healthcare professionals use various methods. One of the common diagnostic tools is an electrocardiogram (ECG or EKG). This test records the electrical activity of the heart and can help identify abnormal rhythms such as AFib. Another method is Holter monitoring, where a portable ECG device is worn by the patient for 24 to 48 hours to capture any irregular heart activity. Additionally, healthcare providers may perform blood tests to check for underlying conditions that could contribute to AFib.