FISDAP Cardiology Practice Test 2025 – The Complete Guide to Mastering Your Cardiology Exam!

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What is the standard lead configuration used in a 12-lead ECG?

5 electrodes placed on the body

8 electrodes placed on the body

10 electrodes placed on the body

The standard lead configuration used in a 12-lead ECG employs 10 electrodes placed on the body. These electrodes consist of 4 limb electrodes and 6 chest electrodes. The limb electrodes are typically placed on the arms and legs, while the chest electrodes are positioned across the chest in specific locations to provide a comprehensive view of the heart's electrical activity from multiple angles.

Each of these electrodes contributes to the creation of 12 different leads, which are derived from the signals produced by the placement of these 10 electrodes. The 12 leads provide vital information about the heart’s rhythm, size, and electrical axis, allowing for thorough assessment and diagnosis of various cardiac conditions. Thus, understanding the arrangement and function of these electrodes is crucial for accurate interpretation of the ECG.

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12 electrodes placed on the body

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