Patent ID: 6584344
Filing Date: 2003-06-24
Classification: A61B

Abstract:
A method for detecting a heart beat and calculating heart rate on the basis of the detected heart beats, the method comprising:forming an EKG signal on the basis of signals measured from the skin of a person, detecting from the EKG signal a heart beat candidate to which a rationality analysis is performed, in which rationality analysis: the time difference between the heart beat candidate and the heart beat detection preceding it is calculated and on the basis of the time difference, a momentary heart rate value is calculated, the calculated momentary heart rate value is compared with a median value of the heart rate, which is a median of two or more earlier heart rate values, the heart beat candidate is accepted as a heart beat detection, if the momentary heart rate value calculated on the basis of the heart beat candidate is, when compared with the median value, within threshold values of the median value, and updating as the heart rate value the momentary heart rate value calculated on the basis of the accepted heart beat detection.