Continuous long-term monitoring of a subject

An apparatus comprising:

• a memory;
• and
• a processor coupled to the memory;
• the processor being configured:
• to obtain monitoring data recorded by a first device and a second device, the first device being attached to a subject at a first site and the second device being attached to the subject at a second site different than the first site, the monitoring data comprising a first set of one or more signals associated with at least one physiological parameter of the subject obtained from the monitoring data recorded by the first device and a second set of one or more signals associated with said at least one physiological parameter of the subject obtained from the monitoring data recorded by the second device;
• to extract, from the monitored data, one or more features of the first set of one or more signals recorded by the first device and the second set of one or more signals recorded by the second device during a transitionary period when the first device and the second device are simultaneously monitoring said at least one physiological parameter of the subject
• to generate at least one correlation parameter by analyzing the extracted features of the first set of one or more signals recorded by the first device and the second set of one or more signals recorded by the second device for at least a portion of the transitionary period, said at least one correlation parameter when applied to the second set of one or more signals recorded by the second device at least partially compensating for changes in the second set of one or more signals recorded by the second device relative to the first set of one or more signals recorded by the first device;
• and
• to apply said at least one correlation parameter to the second set of one or more signals recorded by the second device;
• wherein said at least one physiologic parameter comprises an electrocardiogram (ECG) measurement, and generating said at least one correlation parameter comprises:
• extracting wave component features from a first set of one or more ECG signals recorded by the first device and a second set of one or more ECG signals recorded by the second device;
• correlating changes in one or more of the wave component features of the first set of one or more ECG signals recorded by the first device with corresponding wave component features of the second set of one or more ECG signals recorded by the second device during at least a portion of the transitionary period;
• identifying differences between one or more of the wave component features of the second set of one or more ECG signals recorded by the second device and one or more of the wave component features of the first set of one or more ECG signals recorded by the first device for the correlated changes;
• and
• generating said at least one correlation parameter for application to the second set of one or more ECG signals recorded by the second device that offsets at least a portion of the identified differences.

A non-transitory processor-readable storage medium having stored therein program code of one or more software programs, wherein the program code when executed by at least one processing device causes said at least one processing device:

• to obtain monitoring data recorded by a first device and a second device, the first device being attached to a subject at a first site and the second device being attached to the subject at a second site different than the first site, the monitoring data comprising a first set of one or more signals associated with at least one physiological parameter of the subject obtained from the monitoring data recorded by the first device and a second set of one or more signals associated with said at least one physiological parameter of the subject obtained from the monitoring data recorded by the second device;
• to extract, from the monitored data, one or more features of the first set of one or more signals recorded by the first device and the second set of one or more signals recorded by the second device during a transitionary period when the first device and the second device are simultaneously monitoring said at least one physiological parameter of the subject;
• to generate at least one correlation parameter by analyzing the extracted features of the first set of one or more signals recorded by the first device and the second set of one or more signals recorded by the second device for at least a portion of the transitionary period, said at least one correlation parameter when applied to the second set of one or more signals recorded by the second device at least partially compensating for changes in the second set of one or more signals recorded by the second device relative to the first set of one or more signals recorded by the first device;
• and
• to apply said at least one correlation parameter to the second set of one or more signals recorded by the second device;
• wherein generating said at least one correlation parameter comprises:
• correlating changes in one or more of the extracted features of the first set of one or more signals recorded by the first device with corresponding extracted features of the second set of one or more signals recorded by the second device during at least a portion of the transitionary period;
• identifying differences between the extracted features of the first set of one or more signals recorded by the second device and the extracted features of the second set of one or more signals recorded by the first device for the correlated changes;
• and
• generating said at least one correlation parameter for application to the second set of one or more signals recorded by the second device that offsets at least a portion of the identified differences.