The naturopathic doctors and functional medicine practitioners at Neurvana utilize heart rate variability (HRV) training, which can be used to control anxiety, asthma, irregular heartbeat, and chronic obstructive pulmonary (COPD) symptoms, as well as neurofeedback or electroencephalography (EEG). Also called neuro-biofeedback, EEG measures brain waves to treat cognitive issues, ADHD, sleep disturbances, and more.