System and method for monitoring and diagnosing patient condition based on wireless sensor monitoring data

A method of operating a device, the device comprising:

• a first electrode, a second electrode, and a third electrode, each of the electrodes having an end for contacting an area of the skin of the subject, wherein the directional positioning from the end of the second electrode to the end of the first electrode is substantially perpendicular to the directional positioning from the end of the third electrode to the end of the first electrode, and wherein each of the electrodes are configured to obtain two channels of ECG data, the first channel measuring a difference in electric signals between the first electrode and the second electrode, and the second channel between the first electrode and the third electrode,
• the method comprising:
• acquiring a first channel and a second channel of ECG data using the first electrode, the second electrode, and the third electrode;
• and
• combining the first and second channels of ECG data into a third channel using vector mathematics.

A method of managing a heart condition for a subject, comprising:

• (a) detecting intrathoracic electrogram signals of the subject over a first defined period of time by at least one implantable cardiac device having a sensor component implanted in the heart of the subject;
• (b) determining whether the subject is experiencing a heart condition based on the electrogram signals;
• (c) detecting ECG signals of the subject over the first defined period of time by at least one surface sensor attached to the skin of a subject,
• (d) determining whether the subject is experiencing the heart condition based on the ECG signals;
• (e) based upon the results of each of steps (b) and (d), determining whether to perform an action by the implantable cardiac device of a therapy to influence the electrical system of the heart of the subject in order to address the heart condition;
• and
• (f) performing, by the implantable cardiac device, the action if the determination result in step (e) is positive.