Distributed cardiac activity monitoring with selective filtering

A cardiac monitoring apparatus comprising:

• a communications interface;
• a real-time heart beat detector;
• a T wave filter frequency domain;
• and
• a selector that activates the T wave filter frequency domain with respect to the real-time heart beat detector in response to a message, wherein the activated T wave filter frequency domain preprocesses a cardiac signal provided to the real-time heart beat detector.

A method comprising:

• receiving at least a portion of a sensed cardiac signal from a monitoring apparatus in contact with a living being under active cardiac monitoring;
• identify an abnormal T wave in the received cardiac signal;
• and
• sending a message to the monitoring apparatus over a communications channel, the message causing the monitoring apparatus to activate a T wave filter frequency domain used in identifying heart beats of the living being under active cardiac monitoring.

A system comprising:

• means for identifying heart beats in a sensed cardiac signal;
• means for filtering the sensed cardiac signal to reduce T waves in the sensed cardiac signal;
• and
• means for selectively activating the means for filtering in response to discovery of a predetermined characteristic in the sensed cardiac signal.