Apparatus and methods for determining the precise times of occurrence of R-waves in an ECG signal of a patient. Samples of the patient's ECG signal are accumulated and an ECG window comprising a predetermined number of the samples is defined. In accordance with one embodiment of the invention, the patient's...http://www.google.es/patents/US5984954?utm_source=gb-gplus-sharePatente US5984954 - Methods and apparatus for R-wave detection
