Wearable ambulatory medical device with multiple sensing electrodes

A wearable arrhythmia monitoring and treatment device for improving confidence in determined arrhythmias prior to treatment, comprising:

• a plurality of sensing electrodes configured to be disposed at spaced apart positions about a body of a patient;
• one or more therapy electrodes configured to be disposed about the body of the patient;
• an electrode signal acquisition circuit having a plurality of inputs, each respective input of the plurality of inputs being electrically coupled to a respective sensing electrode of the plurality of sensing electrodes, the electrode signal acquisition circuit being configured to sense a respective signal provided by each of a plurality of different pairings of the plurality of sensing electrodes;
• and
• a monitoring and detection circuit, electrically coupled to an output of the electrode signal acquisition circuit, the monitoring and detection circuit including at least one processor configured to
• analyze the respective signals provided by each of the plurality of different pairings of the plurality of sensing electrodes,
• change a confidence level in a determined arrhythmia condition based on the respective signals provided by the plurality of different pairings of the plurality of sensing electrodes, and
• initiate a therapy to the patient via the one or more therapy electrodes based on the confidence level.

A wearable monitoring device, comprising:

• at least two ECG channels corresponding to a plurality of pairings of ECG sensing electrodes disposed at different axial positions around a body of a patient and integrated into a garment such as a shirt or vest that is worn on a torso of the patient;
• a signal acquisition circuit configured to be integrated into the garment, the signal acquisition circuit being configured to be electrically coupled to the ECG sensing electrodes and configured to process ECG signals;
• and
• a processor in communication with the signal acquisition circuit, the processor being configured to
• instruct the signal acquisition circuit to analyze respective signals provided by the at least two ECG channels,
• determine a presence of an arrhythmia condition based on the respective signals from one or more of the at least two ECG channels,
• assess a confidence level in the determined arrhythmia condition based on the respective signals from two or more of the at least two ECG channels, by
• increasing the confidence level in the determined arrhythmia condition in response to determining that the arrhythmia condition is still present or is also present on an ECG channel additional to the one or more of the at least two ECG channels, or
• decreasing the confidence level in the determined arrhythmia condition in response to determining that the arrhythmia condition is not present or is no longer present on an ECG channels additional to the one or more of the at least two ECG channels, and
• execute one or more instructions that result in defibrillation being applied to the body of the patient in response to the confidence level being above a certain threshold.