Heart rate information is used at least in part to obtain one or more parameters for inducing respiration. In various implementations, respiratory parameters, such as a target breathing rate or a target tidal volume may be delivered by an implantable device to a patient during periods of altered respiration,...http://www.google.com.hk/patents/US7467012?utm_source=gb-gplus-share專利 US7467012 - Respiration parameters controlled by heart rate
