Characterizing Chemo-Radiotherapy Treatment-Related Cardiac Changes

This trial studies cardiac changes after radiation or chemo-radiation for the treatment of lung or esophageal cancer that has not spread to other places in the body (non-metastatic) or has not come back (non-recurrent). Continuous cardiac monitoring with an implanted device may help to identify cardiac changes that would remain unnoticed, and facilitate the treatment of these early cardiac changes as part of standard care.