v2, or the second limb lead in an electrocardiogram (ECG), is a crucial lead placement that helps in monitoring the heart's electrical activity, specifically over the precordial region. It is positioned in the fourth intercostal space at the left sternal border, allowing for effective visualization of the anterior and septal walls of the heart. The data gathered from v2 plays an important role in diagnosing various cardiac conditions and understanding overall heart function.
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