Background: Late effects of cancer and its treatment include pain, fatigue, stress, and depression all mediated by autonomic dysfunction. Heart Rate Variability (HRV) coherence is an established measure of autonomic dysfunction. Cancer survivors have lower HRV coherence than normal controls. HRV biofeedback (HRV-B) training improves HRV coherence, restores autonomic health, and reduces the above symptoms. This report describes a feasibility study of HRV-B in symptomatic cancer survivors. Methods: In a randomized, waitlist controlled, clinical trial, 179 were screened, 34 enrolled and 31 completed the protocol. Participants in the intervention arm received weekly HRV-B training up to six weeks. Outcome measures assessed at baseline (pre) and after week six (post) included HRV coherence plus Insomnia Symptom Questionnaire (ISQ), Suscro Distress Inventory (SDI), Brief Pain Inventory (BPI), Multi-Dimensional Fatigue Inventory (MFI), Perceived Stress Scale (PSS) and Beck Depression Inventory II (BDI-II). Results: See table below. Conclusions: Delivering HRV Biofeedback training to cancer survivors is feasible at our Cancer Institute. This pilot study provides preliminary evidence that HRV-B for cancer survivors improves HRV coherence and reduces insomnia, pain, fatigue, depression, and stress. The intervention has great potential and further research is indicated.