Patent ID: 6208899
Filing Date: 2001-03-27
Classification: A61N

Abstract:
An implantable cardiac stimulator configured to detect the presence of a normal sinus rhythm or an abnormal cardiac condition of a patient's heart in response to a signal from a lead coupled to the patients heart, the stimulator comprising:an amplifier for receiving and amplifying a signal from the lead in the patient's heart;a variable bandpass filter for receiving the amplified signal, the filter having a filter center frequency dynamically configurable to facilitate passing a filtered signal corresponding to a normal sinus rhythm or an abnormal cardiac condition;a signal processor for processing the filtered signal to generate a detected output signal corresponding to the presence of a normal sinus rhythm or an abnormal cardiac condition; anda control circuit for adjusting the center frequency of the variable bandpass filter in response to the detected output signal of the signal processor to facilitate detection of an abnormal cardiac condition.