How many precordial leads are included in a standard ECG configuration?

A standard electrocardiogram (ECG) configuration typically includes six precordial leads. These leads, designated as V1 through V6, are placed on the chest to provide a comprehensive view of the heart's electrical activity from different angles.

Each precordial lead offers unique information about the heart, particularly regarding the anterior and lateral walls. For instance, leads V1 and V2 are primarily associated with the right side of the heart, while V3 and V4 focus on the anterior wall, and V5 and V6 monitor the left side. This arrangement is crucial for diagnosing various cardiac conditions, as it allows healthcare professionals to pinpoint the location of abnormalities accurately.

In contrast, options that suggest fewer or more than six leads do not align with standard ECG practices. Thus, the configuration of six precordial leads is essential for a complete and effective assessment of cardiac health.