How does RF ablation generate heat within the tissue?

Radiofrequency (RF) ablation generates heat within the tissue primarily through the movement of ions causing friction. When RF energy is applied to the tissue, it creates an alternating electric field that causes charged particles (ions) within the tissue to move back and forth. This ionic movement results in molecular agitation, leading to friction and, consequently, the generation of heat. The heat produced is what ultimately causes the targeted tissue to coagulate or vaporize, effectively performing the ablation.

This process is distinct from other methods such as laser application, which uses focused light energy to generate heat, or the use of heated instruments, which would introduce heat directly through conduction rather than through the intrinsic properties of the tissue. The movement of ions and the resultant friction is a pivotal mechanism in RF ablation, illustrating why this option is the most accurate representation of the heating mechanism involved.