Final answer:
The anterior surface of the heart is best visualized by ECG using the chest leads V1-V4. These leads capture the heart's electrical activity from the front, helping diagnose conditions like infarcts.
Step-by-step explanation:
The anterior surface of the heart is best visualized by ECG leads labeled V1-V4. These leads are specifically positioned on the chest to capture the electrical activity of the heart's anterior aspect. During an ECG, the depolarization vectors, representing changes from positive to negative during the depolarization of the heart muscle, are recorded from various angles by different leads, providing a comprehensive view of the heart's electrical activity. Those leads that are placed across the chest (V1-V4) are most accurate at depicting the anterior part of the heart. Understanding the depolarization vectors and how they are measured by ECG can aid in diagnosing conditions such as infarcts, which are detectable as irregularities in one or more lead potentials. As ECG technology has advanced, these recordings can be taken with portable, and even wearable, devices that provide instant readings and printouts, making cardiac monitoring more accessible than ever before.