“…With an analogy to auditory noise cancellation, the device is cancelling the variations in tidal volume but the driving "noise," the high loop gain-based periodic breathing, continues unabated. Moreover, adaptive ventilation can cause substantial patientventilatory desynchrony, 17 which remains unidentified. In the SERVE-HF trial, up to a device detected AHI TIDAL 10 events/h of use was taken as a success, which likely overlooked a large degree of ongoing unrecognized periodic breathing, in addition to the basic scoring issues already mentioned.…”