Patent ID: 7920912
Filing Date: 2011-04-05
Classification: A61B

Abstract:
1. A system for selectively triggering a device in response to an electrocardiogram signal comprising: a microprocessor comprising a microprocessor digital input and a microprocessor control output; a peak detector comprising a peak detector input and a peak detector output; and a trigger circuit having a peak detection control input, a microprocessor control input and trigger output, the peak detection control input in communication with the peak detector output and the microprocessor control input in communication with the microprocessor control output, wherein said trigger circuit generates an output signal on the trigger output in response to a peak detection control input signal from the peak detector output and a microprocessor control input signal from the microprocessor control output, wherein the microprocessor control input signal inhibits the trigger output signal if the electrocardiogram signal has one of either a predetermined number of decreasing values in a positive R-wave or a predetermined number of increasing values in a negative R-wave and permits the trigger output signal in response to detecting two successive peaks in a differentiated single heartbeat if the electrocardiogram signal has a duration of between seven and seventy milliseconds between a predetermined threshold and a detected peak of the differentiated electrocardiogram signal, and wherein such detection is in response to a validation of at least two QRS complexes.