Compression therapy primarily helps in which of the following aspects?

Compression therapy is specifically designed to promote venous blood flow, making it the correct answer. The application of graduated compression helps to reduce venous reflux and improve the overall circulation in the legs. By applying pressure to the lower limbs, compression therapy enhances the movement of blood back towards the heart, thus facilitating better venous return and decreasing the likelihood of blood pooling in the veins. This is particularly beneficial for patients suffering from conditions such as chronic venous insufficiency or varicose veins, where venous flow is compromised.

While other answers mention effects related to varicose veins and lymphatic drainage, they do not capture the primary mechanism and purpose of compression therapy as accurately as promoting venous blood flow does. Increasing heart rate is also unrelated to the direct effects of compression therapy. Therefore, emphasizing the promotion of venous blood flow highlights the crucial role that compression garments play in managing venous disorders.