This could be big...

https://medicine.wustl.edu/news/radi...gular-rhythms/

Radiation therapy reprograms heart muscle cells to younger state

New research from Washington University School of Medicine in St. Louis suggests that radiation therapy can reprogram heart muscle cells to what appears to be a younger state, fixing electrical problems that cause a life-threatening arrhythmia without the need for a long-used, invasive procedure.

In that invasive procedure — catheter ablation — a catheter is threaded into the heart, and the tissue that triggers the life-threatening irregular heart rhythm — ventricular tachycardia — is burned, creating scars that block the errant signals. The new study, however, shows that noninvasive radiation therapy normally used to treat cancer can reprogram the heart muscle cells to a younger and perhaps healthier state, fixing the electrical problem in the cells themselves without needing scar tissue to block the overactive circuits. The study also suggests that the same cellular reprogramming effect could be achieved with lower doses of radiation, opening the door to the possibility of wider uses for radiation therapy in different types of cardiac arrhythmias.
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