Which type of lead configuration is primarily used to target the left ventricle?

The type of lead configuration that is primarily used to target the left ventricle is multipolar leads. Multipolar leads consist of multiple electrodes spaced along the lead body, which allows for more precise delivery of pacing and sensing in the heart. This configuration is especially beneficial for left ventricular pacing, as it enables clinicians to stimulate specific areas of the ventricle and optimize the pacing location. This can enhance the overall effectiveness of cardiac resynchronization therapy (CRT), which is often aimed at improving heart function in patients with heart failure.

In contrast, bipolar leads have two electrodes and are typically used for more traditional pacing applications, but they may not offer the flexibility needed for optimal left ventricular pacing. Unipolar leads, using a single electrode and relying on a return path to a distant electrode, may not provide the desired spatial resolution for effective left ventricular stimulation. Transvenous leads refer to the delivery method rather than the configuration itself and can be either unipolar or bipolar. Therefore, the multipolar lead configuration is specifically designed to maximize the therapeutic effects on the left ventricle, making it the most suitable choice for targeting that area.