The standard ECG consists of how many leads?

The standard ECG, or electrocardiogram, consists of 12 leads. These leads provide a comprehensive view of the electrical activity of the heart from different angles, which is crucial for accurate diagnosis. The 12 leads include 6 limb leads and 6 precordial (chest) leads.

The limb leads (I, II, III, aVR, aVL, and aVF) are derived from electrodes placed on the arms and legs, while the precordial leads (V1 through V6) are placed across the chest. This configuration allows healthcare professionals to assess various aspects of heart function, including rhythm, heart size, and the presence of any ischemic changes.

This standardization to 12 leads has been well-established in clinical practice, making it a key tool for cardiologists and other healthcare providers in identifying and managing cardiovascular conditions.