Abstract: The disclosure relates to a method for determining a QT interval of an electrocardiogram (ECG) signal comprising the steps of: determining a QT interval of an electrocardiogram (ECG) signal comprising the steps of: determining a maximum slope of the ECG signal after a T wave maximum of the ECG signal, and fixing an end of the QT interval by performing, for example, extrapolating the maximum slope to a zero line of the ECG signal.

Abstract: An implantable medical device comprises a sensor device for obtaining a signal indicative of cardiac activity within a patient, and a processor device configured to process said signal obtained using the sensor device. The processor device is configured to detect a peak indicative of a cardiac event in said signal by comparing said signal to a sense threshold. The processor device in addition is configured to adaptively control said sense threshold such that the sense threshold in at least one time period assumes a value which is constant over said at least one time period, wherein the sense threshold is reduced after lapse of said at least one time period.

Abstract: An implantable heart monitoring device including a sensing unit, a signal quality analysis unit, and an evaluation unit. The sensing unit is connected to at least one electrode that picks up electric potentials. The sensing unit processes electrical signals corresponding to the electric potentials, and generates sense signals including events corresponding to myocardial contractions. The signal quality analysis unit determines whether a noise condition (NC) and/or a low signal indication is present for an event and generates an indication signal. The evaluation unit evaluates the sense signals and the indication signals, treats a detected event as non-valid if a NC and/or low signal indication signal is present for that event, and uses only intervals defined by two consecutive events which do not have a NC and/or a low signal indication to determine a rate of events of the sense signal.