Stereotactic radiotherapy (SRT), a highly successful and effective method in the treatment of solid tumors, is now also being utilized for cardiac arrhythmias resistant to conventional drug and ablation therapies. This innovative approach is particularly valuable when the source of the arrhythmia cannot be precisely accessed via catheter ablation. Through computer-guided 3D imaging, SRT delivers highly precise radiation to the target area, providing an effective treatment for these complex arrhythmias. The application of SRT for rhythm disorders requires meticulous preparation and a collaborative effort between radiation oncologists and cardiologists. This process involves precise mapping to identify the origin of the tachycardia, often originating from scar tissue post-myocardial infarction. The target region is then meticulously confirmed using advanced radiological methods, such as cardiac MRI and computed tomography. After the boundaries of this region are defined and marked by the radiation oncology team, treatment is delivered with highly focused, pinpoint radiation using sophisticated 3D image-guided devices.