A method for the detection of subcutaneous cardiac signals and a cardiac device for use in detecting subcutaneous cardiac signals

摘要

A method for the detection of QRS signals within a composite heart signal of a body is provided, comprising the steps of:
- providing at least two input heart signals via at least two separate input channels, each channel connected to external sensing electrodes, wherein each of the at least two input heart signals is recorded by pairs of sensing electrodes that have one electrode in common and provided coincidental in time;
- generating estimated signals from the input heart signals;
- combining the three input heart signals and the estimated signals to a combined input stream (SECG);
- detecting the QRS signal by comparing the combined input stream (SECG) to an adaptive detection threshold (ATHR) which adapts throughout time. A cardiac device for use in detecting QRS signals within a composite heart signal of a body according to this method is also provided.