Patent ID: 8321001

Claim:
An electromedical implant, comprising at least two electrodes configured to record electric signals that reflect a curve of a far-field electrocardiogram signal of a right and left atria of a heart; a far-field electrocardiogram capturing unit configured to record a first far-field electrocardiogram signal and record a second far-field electrocardiogram signal between different electrodes of said at least two electrodes, wherein said far-field electrocardiogram capturing unit is connected or can be connected to the at least two electrodes; a detection unit, which is configured to detect signal features that characterize atrial cardiac actions in an electrocardiogram signal; an averaging unit, which is connected to the far-field electrocardiogram capturing unit and the detection unit and is configured to average a plurality of signal sections of the first far-field electrocardiogram signal associated with a particular detected atrial cardiac action to generate a first averaged P-wave signal associated with the first far-field electrocardiogram signal; average a plurality of signal sections of the second far-field electrocardiogram signal associated with a particular detected atrial cardiac action to generate a second averaged P-wave signal associated with the first far-field electrocardiogram signal; determine the earliest onset of atrial excitation through a search of said first averaged P-wave signal and said second averaged P-wave signal; and, an evaluation unit, which is connected to the averaging unit and which is configured to determine a duration of an averaged P-wave in a particular averaged P-wave signal based on said earliest onset of said atrial excitation in said first averaged P-wave signal and said second averaged P-wave signal.