What is the primary reason for using a 12-lead ECG?

The primary reason for using a 12-lead ECG is to provide a comprehensive view of the heart's electrical activity. This method captures the electrical impulses of the heart from multiple angles and perspectives, allowing for a detailed assessment of the heart's rhythm, size, position, and any potential abnormalities affecting the myocardial tissue. By utilizing multiple leads, healthcare professionals can detect various cardiac conditions, including ischemia, infarction, and conduction abnormalities, which may not be visible with fewer leads. This broad perspective is essential for accurate interpretation and effective diagnosis of cardiac issues, ultimately guiding treatment decisions.