Pace pulse detector for an implantable medical device

A method comprising:

• processing electrical signals sensed on an implantable electrical lead coupled to an implantable medical device;
• detecting, based on the processing of the electrical signals sensed on the implantable electrical lead, delivery of pacing pulses from a second implantable medical device, wherein the detecting comprises detecting a first type of pulse having a first set of characteristics and a second type of pulse having a second set of characteristics different than the first set;
• modifying the sensed electrical signal to remove the first type of pulse from the sensed electrical signal;
• and
• modifying a tachyarrhythmia detection algorithm based on the detected pacing pulses.

An extravascular implantable cardioverter-defibrillator (ICD) comprising:

• a sensing module that obtains electrical signals sensed using at least an implantable electrical lead coupled to the ICD;
• a pace detector including:
• a first pace pulse detector that detects, within the obtained electrical signals, a first type of pulses having a first set of characteristics;
• and
• a second pace pulse detector that detects, within the obtained electrical signals, a second type of pulses having a second set of characteristics different than the first set of characteristics.
• a blanking module that holds the sensed electrical signal at a current value to remove the first type of pulse from the sensed electrical signal;
• and
• a control module that modifies a tachyarrhythmia detection algorithm based on the detected pacing pulses.